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Scientia Silvae Sinicae 1983 Vol.19 Please wait a minute... For Selected: Download Citations EndNote Reference Manager ProCite BibTeX RefWorks Toggle Thumbnails Select A PRELIMINARY STUDY ON RELATIONSHIP BETWEEN SOILS AND GROWTH VOLUME OF POPLARS IN ALLUVIAL PLAINS OF THE NORTH CHINA AND THE MIDDLE YANGTZE RIVER BASIN Li Yi-quan Chen;Zhang-shui null    1983, 19 (1): 1-13.   Abstract （686）      PDF （901KB）（690）       Knowledge map    Save This paper deals with the relationship between soils and mean annual Increment single poplar tree in the vast plain of eastern China. According to the climate, the geomorphy, the parent materials, and the groundwater level, soils of this region may be divided into ten types. The sequence of their fertility is as follows: grey fluvo-aquic soil, red clayed fluvo-aquic soil, loamy fluvo-aquic soil, fluvo-aquic cinnamon soil, desaline fluvo-aquic soil, carbonate cinnamon soil, shajiang black soil, saline fluvo-aquic, sandy fluvoaquic soil and solonchak. Compared with the forest soil in mountainous region, the organic matter content and total nitrogen content in all plain soils are poor. Except soil available potassium, most plain soils are also poor in available nitrogen and especially available phosphate. Both in the soil or in the ground water all over the plain the calcium is very abundant, it suits poplar-calciphile very well. The datum of mean annual increment of 16 poplar clones and 3 other broad-leaved tree species in different soils have been given in this paper. According to the results of the former study, it is proved that each poplar species has its own suitable site. Related Articles | Metrics Cited: Baidu(3) Select THE NUMERICAL CLASSIFICATION OF FOREST ECOLOGICAL DISTRICTS Yin Tai-long null    1983, 19 (1): 14-24.   Abstract （641）      PDF （584KB）（569）       Knowledge map    Save On the basis of analysing 34 forest ecological factors about climate, soil, landforms and. geology, 42 forest ecological counties are classified with cluster analysis and principal component analysis (PCA) and the reliability of 5 alternative of classification are examined with the method of discriminant analysis. With the aid of said numerical classification, 42 forest ecological counties of Jilin Province has merged into five forest ecological districts.Brief description of each district is given which will provide scientific basis for the conservancy and administration of forest ecological system. Related Articles | Metrics Cited: Baidu(7) Select STUDIES ON DEVELOPMENT OF EMBRYOID FROM THE CULTURE COTYLEDONS OF TUBA SINENSIS L. Yan Mu-qin;Chen Ping null    1983, 19 (1): 25-29.   Abstract （649）      PDF （365KB）（522）       Knowledge map    Save The use of improved ER medium will enable cotyledons basis and cotyledon petiole of the Thea sinensis L. to develop embryoid. The cytohistological and morphological investigations on the changes in developing process of embryoid have been made in detail. Our works reveal that the embryoid of Thea sinensis L. are differentiated from the epidermal cell of cotyledons. The initial separating patterns of the embryogensis in embryo and embryoid are different. But it js more similar in their form-formative processes. We also found that the different kinds exogenous growth regulators and their quantity used for the cultural medium will affect the differentiations of embryoid and the formation of young plants. Related Articles | Metrics Select A PRELIMINARY STUDY ON KOREAN PINE BAST SCALE, MATSUCOCCUS KOBAIBNSIS YOUNG ET HU Hu Yin-yue;Dai Hua-guo;Du Xing-tang;Li Ai-lian null    1983, 19 (1): 30-38.   Abstract （649）      PDF （550KB）（490）       Knowledge map    Save The red pine bast scale, Matsucocous koraiensis Young et Hu, is a pest of Korean pine (Pinus koraiensis) widely distributed over the virgin forests in the eastern mountains of the Heilongjiang and Jilin provinces. In Fenlin district the Korean pine bast scale has one generation a year and overwinters in the 1st instar. After overwintering the 2nd inster larval stage is a chiefly injuring period. The adult emerges in early June and become abundant in mid-June. Reproduction is sexual, but we observed that one of the females produced eggs before copulation. On an average, each female oviosits about 96 eggs. The young larva hatches in the later part of June and becomes abundant in mid-July. The Korean pine bast scale insects mainly in the virgin forest of the Korean pine distributed on the southern or south-western slope. Eight blocks of the younger pine plantation were recently investigated, but no bast scale was found. Some scale insects have been inoculated against the plantation, but whether they could overwinter or not must be determined by further observation. Aphislions and ants are the important natural enemies which considerably control the population density of this pest. Related Articles | Metrics Select THE QUANTIZED MODEL FOR FORECASTING THE GROWTH AND DECLINE OF DNDROLIMUS PUNTATUS WALK. Wu Jing;Hong Wei;Weng Shao-rong;Chi Xin-tian null    1983, 19 (1): 39-45.   Abstract （594）      PDF （334KB）（519）       Knowledge map    Save In order to find out the law of the growth and decline of D.puntatus Walk. and develop a mathematical forecast model, the writers collected the 17 years' historical material of D. puntatus Walk. And the meteorological factors at Lianjiang County in Fujian Province. Twelve main factors were selected and then graded. The calculation method of probability regression in the theory of quantization was used for developing the mathematical forecast model. With this model for forecasting 100% accuracy can be achieved. The predictions of the degree of harmness of this insect in 1978,1979 and 1980 were successful. Related Articles | Metrics Select TWO NEW SPECIES OF TENTHREDINIDAE FROM CHINA (HYMENOPTERA:SYMPHYTA) Xiao Gang-rou;Zhou Shu-zhi;Huang Xiao-yun null    1983, 19 (1): 46-49.   Abstract （644）      PDF （220KB）（542）       Knowledge map    Save Two species of sawflies new to science are described in the present paper. Type specimens are deposited in the insect collection of the Forest Research Institute, the Chinese Academy of Forestry, Beijing, China. 1. Conaspidia kalopanaeis Xiao et Huang sp. nov. This species resembles Conaspidia guttata (Matsumura), but distinguished from it by mesonotum entiraly yellowishbrown, female mesopleura with fewbig shallow punctures, lancet with 21 annuls, each serrula with regular small teeth. Holotype:, Jiangxi province. Allotype:, the same as for the holotype. Paratype; 4,8, the same as for the holotype. 2. Messa taianensis Xiao et Zhou sp. nov. Nearest to Messa leucostoma (Rohwer), but differs from it in antennal segments 1—2 basally and segments 3—4 dorsally black, the rest yellowish brown, ventral surface of antenna yellowish, head black except for clypeus, labrum being yellowish, lancet with 1st serrula with four posterior subbasal teeth, 2—3 serrulae with five posterior subbasal teeth, 4—11 serrulae with 6—8 posterior subbasal teeth. Holotype:, Liaoning province. Allotype:, the same as for the holotype. Paratype: 5, 4, the same as for the holotype. Related Articles | Metrics Cited: Baidu(7) Select STUDIES ON COLLETOTBICHJTM GLOEOSPOBIOIDES OF OLIVE ANTHRACNOSE AND ITS CONTROL Shi Quan-chang;Zheng Wen-feng null    1983, 19 (1): 50-56.   Abstract （641）      PDF （469KB）（539）       Knowledge map    Save Olive anthracnose, Colletotrichum gloeosporioides, was prevalent in the South of Qin-ling in Shanxi. When the disease was serious, it caused 30.4—40.3% decrease in the yield of oil of olive fruits. The pathogen mainly attacks the Olive at asexual stage. The pathogenic fungi are made of 2 types:the mycelial type producing abundant mycelium and few conidia; and the conindial type producing many conidia with seta and very few mycelium. The incubation period is to be 2—7 days. The difference in disease resistance of varieties was notable. It seemed that the structure of the epidermal cells of Olive fruits was relative to the disease resistance. When the disease was prevailing, the control using 800 times 50%Tuzet or 1% Bordeaux mixture resulted in satisfaction. Related Articles | Metrics Select null    1983, 19 (1): 57-63.   Abstract （648）      PDF （673KB）（546）       Knowledge map    Save Related Articles | Metrics Select STUDIES ON THE HEATING PROCESS FOR WOOD PLASTIC COMBINATION Ge Ming-yu;Peng Hai-yuan;Dai Cheng-yue;Li Jian null    1983, 19 (1): 64-72.   Abstract （677）      PDF （449KB）（855）       Knowledge map    Save The process of Wood Plastic Combination (PWC) is discussed in the paper. Timber is injected with polyvinyl element with positive and negative bases of styrene and maeic anhydride mixed with equimolar ratio and PWC is made through proper heating, reacting, heat releasing and self-polymerizing. The mechanical properties and dimensional stability of PWC are significantly improved in comparison with that of plain timber. It is indeed a good method for timber modification and improvement of wood quality for fast-growing species. Related Articles | Metrics Cited: Baidu(9) Select STUDIES ON SELF-DROPOUT FUNCTION OF ECCENTRICALLY LOADING LOG IN LOGDROPOUT SORTING SYSTEM BY GRAVITY WITH COLLAPSED TOGGLES Shi Ji-yan;Xu Heng-qin null    1983, 19 (1): 73-81.   Abstract （713）      PDF （402KB）（518）       Knowledge map    Save Whether the log-dropout sorting system can be adopted or not by gravity for dropping out the logs eccentrically loading on toggles, it is of vital importance to its popularization and development. The theory of this system is discussed in this paper. It is verified by experiment and the formular for calculating the distance from the centre of log to centre Hne of the conveyor is given. Authors of this paper hold that all kinds of log can be successfully dropped themselves out along the ground when their centre of gravity is located inside the guide c (See Fig. 2). Related Articles | Metrics Select null    1983, 19 (1): 82-87.   Abstract （502）      PDF （374KB）（453）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (1): 88-94.   Abstract （560）      PDF （485KB）（663）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (1): 95-97.   Abstract （545）      PDF （213KB）（443）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (1): 98-100.   Abstract （548）      PDF （313KB）（516）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (1): 101-101.   Abstract （527）      PDF （110KB）（467）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (1): 102-108.   Abstract （553）      PDF （419KB）（492）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (1): 109-111.   Abstract （571）      PDF （199KB）（629）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (1): 112-112.   Abstract （561）      PDF （104KB）（534）       Knowledge map    Save Related Articles | Metrics Select STUDIES ON THE NATURE OF BIOLOGY AND PHYSIOLOGY OF MAIN SAND-STABLIZING PLANT IN SHAPOTOU AREA Jiang jin;Dai Feng-nian null    1983, 19 (2): 113-120.   Abstract （612）      PDF （531KB）（549）       Knowledge map    Save The experiments on introduction and plantation were carried out in Shapotou area.The survival rate,preserval rate and the characteristics of thegrowth of plant were observed,and some best sand-stablizing plant species with higher resistant ability and adaptability were selected.On this basis,the mechanism of drought-resistance of these plant species was detailly studied by electric microscope and some analytic methods on the aspect of plantphysiology.Doing so,the scientific evidences on the nature of biology andphysiology will be provided to the introduction of more sand-stablizing plantspecies. On the aspect of morphological structure,by the study,xerophytic succulent Reaumuria soongarica and Calligonum arborescense are characterized by more wax on leaf surface,thicker cuticle and cell wall and by the pittedstoma.But for the xerophytic Caragana korshinskii and Oxytropis aciphylla,their leaf shape is smaller and leaf surface is covered with dense grey floss,covering the stoma,transpiration is then reduced and the leaf-succulent tissue is avoided from burn. On the aspect of physiological nature,these xerophytes are characterized by higher glutinosity of cytoplasm higher elasticity,better permeability,higher capacity for antidetaching of water and heat-resistance,less transpiration,higher content of soluable sugar and higher content of bound water,and higher ratio between bound water and free water,consequently they possess higher capability for the drought-resistance. Related Articles | Metrics Cited: Baidu(8) Select A STUDY OF ULTRASTRUCTURAL CHANGES IN RADICLE-TIP CELLS AND SEED VIGOR OF HOPEA AND VATICA IN LOSING WATER PROCESS Song Xue-zhi;Chen Qing-du;Wang Dong-fu;Yang Jun null    1983, 19 (2): 121-125.   Abstract （679）      PDF （471KB）（560）       Knowledge map    Save After a series of seeds of Hopea hainanensis or Vatica astrotricha were treatedunder artificial drying for different days at 25℃ or 20℃,to reduce theirwater content to what this experiment was designed,two groups of thesetreated seeds were used for comparing their vigor and ultrastructural changes of their radicle-tip cells,respectively.The results obtained are summarized as follows: Following that the water content was reduced continuously,the vigorexpressed as GP(germination percent),GI(germination index)and Ⅵ(vigor index)also decreased obivously for these treated seeds in the germination test.And the morpholgy of embryos and their cotylendons changed todarkening and wilting in different extents. For Hopea hainanensis,when its water content was reduced from 34.9%to 25.6% and GP decreased from 65% to 20%,the ultrastructures ofradicle-tip cells showed significant changes: (1) The cytoplasm formed a lot of vesicles,but the fine structure ofnucleus seemed to be normal. (2) The tonoplast ruptured,the structures in the cell became indistinct. (3) The cytoplasm severely segregated with cell wall,nuclear membrane and nucleolus could not be distinguished. When the seed water content was continuously reduced to 20.3% and they had all died,all the structures in the cell were completely destroyed,cytoplasm was disintegrated.Most of substances in some cells had disappeared;and for a great number of cells,there only the cell wall remained. For Vatica astrotricha,its vigor and ultrastructures in radicle-tip cellschanged similarly in the main as Hopea hainanensis. Related Articles | Metrics Select STUDIES ON THE PROCESS OF GROWTH OF KOREAN PINE(Pinus koraiensis) Li Ke-zhi null    1983, 19 (2): 126-136.   Abstract （718）      PDF （589KB）（584）       Knowledge map    Save This paper presents the results of analysis on the height,d.b.h.andvolume increment of 99 korean pine trees and has found out the conclusionof its growth In Yichun Forest Area,Heilungjiang Province. In the natural stands of korean pine on Ⅱ Ⅲ Ⅳ site classes the maximumannual height growth of these stands in the age of 69,65,and 51 years old,are 0.31,0.28 and 0.23m respectively.The maximum diameterincrements ofthese stands in the age of 100,92 and 93 years old,are 0.44,0.41 and 0.36cm,respectively.The maximum annual volume increments appear in the age of170—180 years old. consequently,We have to pay more attention in managing,korean pinestands during the young stage,say,before 50 years old. Related Articles | Metrics Select SYNTHESIS AND FIELD EXPERIMENT OF SEX ATTRACTANT FOR PINE CATERPILLAR,Dendrolimus Tabulaeformis Meng Xian-zuo;Wang Huai-min null    1983, 19 (2): 137-140.   Abstract （687）      PDF （181KB）（631）       Knowledge map    Save Sex attractant for pine caterpillar(Dendrolimus tabulaeformis Tsai et Liu)—(Z,E)-5,7-dodecadien-1-ol(Ⅰ),(Z,E)-5,7-dodecadien-1-yl acetate(Ⅱ) and(Z,E)-5,7-dodecadien-1-yl propionate (Ⅲ)were synthesized via Wittig condensation reaction. Field trials were undertaken in Chinese pine fields in the suburbs around Beijing in the summer of 1980.The experiments showed that mixture of Ⅰ,Ⅱ and Ⅲ gave strong attractant activity to the male pine caterpillar.Some male moths were attracted to simple Ⅰ,but few males to Ⅱ or Ⅲ. Related Articles | Metrics Select A NEW SPECIES OF THE GENUS AUGOMONOCTENUS (HYMENOPTERA,DIPRIONIDAE) FROM CHINA Xiao Gang-rou Wu Jian null    1983, 19 (2): 141-144.   Abstract （735）      PDF （201KB）（485）       Knowledge map    Save Length 6.0 to 7.5mm．Blue black，strongly shining．Antenna dark brown. Apex of mandible slightly reddish brown；apex of pulpus brown；labrum black or dark brown．Lateral sides of abdomin al tergites 2 to 5 and avterior portions of sterites 1 to 5 yellowish brown．Coxae black，trochanters and dorsal sutrace of femur brown or light dark brown，tibia and tarsus yellowish brown．Wing subhyaline．Venation dark broWN．Head and thorax with grey hairs．Antenna serrate，long，more thall head width，with 12 segments；third segment simple，about 3/4 length of fourth segment；rami each shorter than length of their respective segment；rami of central segments Iongest．OOL: POL：OCL=1：1：2．Anterior margin of clypeus moderately emarginate，arcuate．Clypeus，supraclypeal area and paraantennal area densely punctated；other areas of head and abdomell almost impunctated；thorax with uniform small punctures．Lancet acute trianglar in shape，with 11 annuli，about 1/3 to 1/5 length of annuli extending 0ver virgae；ventral lobes 1 to 4 rather protuberant (fig．A)．Male：Length 5．5 t0 7．0ram．Strongly shining blue black．Labrum slightly reddish brown．Median and lateral portions of abdominal tergites 3 to 4 yellowish brown；lateral sides of abdominal tergites 2，5，6 more or less yellowish; abdominal sternites 1 to 5 mostly deep yellow．Legs beyond black coxae yellow to deep yellow．Anteuna with 12 segments(rarely with 11 segments)，unipectinate．OOL：PoL：0CL=3：3：5．Wing length 4.5 mm．Other characters as for female．Penis valve as in fig．B．Larva：Length 12 to 17ram．Head black．Thorax deep green．Abdomen mostly light green．Dorsal surface of thoracic leg black．Bristles on head surface short，minute and thinly scattered．Preclypeus with 4 thick and longbristles．Antenna with 3 segments，mammillated．Abdominal segmelIt 3 subdivided into 6 annuletst tergum of 1 0th abdominal segment with many short spines． Host：Cones of Cuprassus funebris Endl. Holotype：female，Sichuan(Jintang)，2．N．1982，Li Yuan-xiang．Auotype-male，the same as holotype．Paratypes：5 males，15 females，Sichuan(Jintang，Pengxi)，2．10．11．N．1982，Li Yuan-xiang，Wu Hong—guang．All the type specimens are preserved Intdccollection of the Forest Entomology Division，Forest Research Institute,Chinese Academy of Forestry．The new species may be readily separated from、Augomonctenus libooedrll and A．Talo8u8 the only other two species in the genus by the following characters：Abdomen shining blue black with lateral sides of 2 to 5 tergites and anterior portions of 1 to 5 sternites in female，and median and lateral sides of 3 to 4 tergites in male yellowishbrown anterior margin of clypeus of female moderately emarginated，arcuate．It was compared with a female of Augomonootenu8 libooedrii Rohwer bearing the following data：Larvae coll．Sept．2，1964，adult--July 16，1989：Medford，Oreg．Cones of incense cedar，K．Goedont roared by C．W．Baker：Augomonodenu*liboeedrii Roh．D．R．Smith 82．The species is named for Dr．D．R．Smith． Related Articles | Metrics Select STUDIES ON THE COMBUSTIBILITY OF THE ARTIFICIAL CONIFEROUS FORESTS Zheng Huan-neng;Du Xiu-wen null    1983, 19 (2): 145-152.   Abstract （723）      PDF （453KB）（495）       Knowledge map    Save The present paper points out that the combustibility of forests may be divided by the quantitative method of biomass and energy of forest.A concrete analysis of the artificial coniferous forests such as red pine,scotch pine and larch forests in the north-eastern China was carried out.The results showed that the quantity and energy of the dangerous combustible materials such as surface litter grass,bush,needle,twig will as diameter less than 1cm,dry branch are the most important basis for dividing the combustibility of forests. This paper also puts forward that the main factors influencing quantity and energy of the combustible materials in forests are topography,age of trees and moisture content of soil. Based on these factors the index of the quantity and energy of the combustible materials of various forests are estimated. Related Articles | Metrics Cited: Baidu(56) Select null    1983, 19 (2): 153-167.   Abstract （534）      PDF （822KB）（573）       Knowledge map    Save Related Articles | Metrics Select IMPROVING DURABILITY OF POPLAR PLYWOOD WITH VAPOR PHASE ACETYLATION OF VENEER Yin Si-ci Wang;Wan-hua null    1983, 19 (2): 168-172.   Abstract （699）      PDF （345KB）（516）       Knowledge map    Save Natural durability of poplar wood is very low.The samples of 3 species (Populus deltoides cv."Harvard"(ex.1-63/51),Populus euramericana cv."San Martino"(ex.1-72/58),Populus tomentosa Carr.)were exposed to wood destroying fungus (Lenzites trabea Pers.ex Fr.) for a month and a half in the standard soil block test.The results indicated:1) The mean weight lost of untreated solid wood was around 40 percent,but plywood's about 35 percent that was slightly lower than the wood.2)The mean weight lost of poplar ply wood was threefold as large as ash's and bass's.Therefore,it is very importance for improving the durability of the poplar wood which used as raw material of plywood. Acetylation of poplar veneer in the vapor phase with anhydride has been carried out by using potassium acetate as catalyst and D.M.F.as swelling agent. Acetylation is a effective treatment of nontoxic type against biological deterioration.Before or after decay testing,the weight of the acetylated plywood is much the same.It shows that the acetylation of veneer can bring about marked improvement in durability of poplar plywood. Related Articles | Metrics Select DESIGN AND EXPERIMENT OF U.L.V.SPRAYING HEAD WITH CENTRIFUGAL AND AIR-BLAST ATOMIZATION Zhang Shi-tian null    1983, 19 (2): 173-180.   Abstract （688）      PDF （437KB）（612）       Knowledge map    Save This paper recounts the way for solving two key technological problems of the U.L.V.spraying equipment.The problems are to increase the spraying range and to control the diameter of the droplets by adopting the combined centrifugal and air-blast atomization. Related Articles | Metrics Cited: Baidu(1) Select DISCUSSION ON ECONOMIC ESSENCE OF FOREST PRICE AND THE CALCULATING MODEL OF MAN-MADE FOREST PRICE Liao Shi-yi;Li Zhou;Xu Zhi null    1983, 19 (2): 181-190.   Abstract （717）      PDF （693KB）（546）       Knowledge map    Save This paper discusses the theoretical problems of socialist forest price.In man-made forests,timber forest price is the currency expression of the stumpage value and protection forest price is the currency expression of value of forest colony.Because it is not the product of man-labour,natural forest is valueless,but its price can be calculated in the form of stumpage.The economic essence of forest price is the currency calculating of forest land differential income.Value-forming process and value framework of stumpage of manmade forests are analysed.Various factors constituting forest price and the in terrelations between them are further analysed.At last,the calculating model of forest price is developed. Related Articles | Metrics Cited: Baidu(9) Select null    1983, 19 (2): 191-194.   Abstract （631）      PDF （284KB）（484）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (2): 195-200.   Abstract （592）      PDF （305KB）（546）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (2): 201-208.   Abstract （572）      PDF （458KB）（536）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (2): 209-211.   Abstract （611）      PDF （269KB）（595）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (2): 212-216.   Abstract （604）      PDF （363KB）（546）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (2): 217-218.   Abstract （581）      PDF （111KB）（556）       Knowledge map    Save Related Articles | Metrics Select null    1983, 19 (2): 219-219.   Abstract （567）      PDF （383KB）（511）       Knowledge map    Save Related Articles | Metrics Select THE ADAPTIVE CHARACTER AND SPECIES CHOICE OF MAIN PLANTING TREES OF FARMLAND SHELTERBELT IN THE PEARL RIVER DELTA Xu Yan-qian;Long Wen-bin null    1983, 19 (3): 225-234.   Abstract （692）      PDF （598KB）（539）       Knowledge map    Save An extensive survey was made of the adaptive character and species choice of main planting trees of farmland shelterbelt in the Pearl River Delta.On the basis of investigation and analysis,the acidity of soil,the total content of salt and the height of water level were determined as the main site factor affecting the growth of forest by means of mathematical statisties.The optimum equation was selected by regression: yD(over pH6.1)=8.0927-0.6473x1-0.5059x2 yD(under pH6.1) = 3.7641-16.6671x1-0.0027x2 Taxodium distichum,Taxodium ascendens,Casuarina equisetifolia,and Glyptostrobus pensilis are the main planting tree species of farmland shelterbelts in the Pearl River Delta.pH6.1 is the optimum value of soil acidity suitable to Taxodium distichum and Taxodium ascendens,and pH 7.0—8.0 suitable to Casuarina equisetifolia and Glyptostrobus pensilis.All the 4 species of trees have certain salt-resistant capability,when they are planted on the salinized soil the total salt content of which is 0.38%,they still grow well; but growing speed of Taxodium distichum and Taxodium asoendens shows negative correlation to the total salt content of soil.Water-resistant and moisture-resistant species Taxodium distichum,Taxodium asoendens,and Glyptostrobus pensilis on the planting point,i.e.50cm and 30cm above the water level,show the best performance. 5 site types are classified in the Pearl River Delta,i.e.lower downland leaching type,the plain fresh water type,the network tide-irrigating type,the seashore acid overflówing type and the seashore sandy type.Various tree species suited for planting in the farmland shelterbelt are recommended according to different site types. Related Articles | Metrics Cited: Baidu(5) Select A STUDY ON DEEP PLANTING TECHNIQUE OF POPLAR Zheng Shi-kai;Wang Shi-ji;Liu Ya-rong;Wang Shuang;Dou Zhong-fu null    1983, 19 (3): 235-245.   Abstract （699）      PDF （656KB）（586）       Knowledge map    Save Water is usually the limiting factor for the survival and normal growth of Poplar.The deep planting technique introduced from Italy can be helpful to solve this problem.According to the deep planting experimants thrice in Shansi,Inner Mongolia and Beijing,a survival rate by more than 95% was obtained and the early growth rate of newly planted trees was also increased under the condition.Without irragation deep planted Poplar trees have more and deeper roots and are also able to absorb the ground water directly through the end sections of the sets.This is the reason for high survival rate of the deep planting.The soil temperature of deep layer in the winter satisfies the demand of the sets for slow rooting.The sets deep planted in autumn have already rooted rather profusely before the opening of the buds in next spring.This benefit the survival of young trees planted in autumn. The transpiration rate of deep planted Poplar trees is higher by 2.3—4.4 times and its average daily water consumption of transpiration is higher by 1.83—15.41 times than those of trees planted in the ordinary way.In addition,compared with ordinary planting the deep planted Poplar trees have higher leaves water potential,higher water content and lower water saturated deficit.The active water metabolism shows the superiority of the deep planting technique. Related Articles | Metrics Cited: Baidu(2) Select SYSTEMATIC STUDIES OF SITE CONDITIONS FOR CHINESE FIR AND ITS APPLICATION null null    1983, 19 (3): 246-253.   Abstract （123）      PDF （549KB）（377）       Knowledge map    Save Aimed at improving silviculture practice of Cunninghamia lanceolata by providing a better understanding of site conditions,the present paper offers the recent research finding on systematic geographic regionalization and site classification based on systematic studies of climate (water,heat),topography,bed rock,soil and vegetations associated with chinese fir.3 zones and 5 regions are recognized,with special reference to climate and physiography. The regions are subdivided into subregions.Site types are grouped into groups and distincts based on mesorelief,microrelief (aspect,slope position), soil and vegetations.In addition,the site index table is prepared based upon tree hieght in definite age;another is besed upon relief and soils with method of multi-factor.The application of site classification and site quality evaluation are proposed for silviculture practice. Findings mentioned above provides guide lines for intensive cultivation of chinese fir.It is hoped to be useful to locating commercial production bases,choosing suitable sites and predicting productivity as well as handling silvicultural treatments with the purpose to raise the productivity of Chinese fir plantation. Related Articles | Metrics Cited: Baidu(4) Select THE FOREST SOILS OF WOLONG NATURAL RESERVE AND ITS VERTICAL ZONALTIES DISTRIBUTION Zhang Wan-ru null    1983, 19 (3): 254-268.   Abstract （471）      PDF （984KB）（288）       Knowledge map    Save The Wolong Natural Reserve is situated in the eastern borders of the Qinghai-Xizang Plateau,extending from 102°52' to 103°24' E,and 30°45' to 31°25' N with an area of about 2 thousand Km~2,within this area,peaks rise up as high as 5000—6250m.in altitude.The steep slopes and deep valleys cause all kinds difficuty in transportation.The altitude not less about 500m,some place 200m.Forest soil resources is rich in the Wolong Natural Reserve,and its vertical zonations are quite distinct. On these forest areas,there are mountain yellow soils under evergreen forests,mountain yellow brown forest soils under mixed forest of evergreen and deciduous trees zone,mountain brown forest soils under deciduous and broadleaf forest belts,mountain dark brown forest soils under mixed forest belts of coniferous,deciduous and broadleaf trees mountain brown dark coniferous forest soils under fir forests,subalpine meadow soils,alpine meadow soils under subalpine meadow,alpine meadow zone,alpine desert soils in glacial drift,alpine tundra under ever lasting snow zone. In this paper,the physico-chemical property of main type of forest soils in Wolong Natural Reserve and its vertical distrbution are discussed. Related Articles | Metrics Cited: Baidu(40) Select STUDIES ON SEEDLING GROWTH AND PHOTOSYNTHETIC CHARACTERISTICS OF FOUR POPLAR HYBRIDS Liu Ya-rong;Liu Feng-jue;Wang Shuang;Wang Shi-ji null    1983, 19 (3): 269-276.   Abstract （700）      PDF （438KB）（564）       Knowledge map    Save The growth and photosynthetic characteristics of Populus deltoides Bartr.cv."Lux" (ex.Ⅰ-69/55) and P.×euramericana (Dode) Guinier cv.Ⅰ-214, which are clones of the tribe Algeiros;and P.×Opera Hsü and P.×popularis Hsü which are hybrids of P.Simonii,were studied under the controlled condition both in greenhouse and field during 1979—1981.Special attention was paid to determine their diurnal and seasonal changes of net photosynthetic rates and other related photosynthetic index.The light compensation points in the two clones of Algeiros were 2×103 Lux,the light saturation points were 3—4×104 Lux and the dark respiration rates were 2.87—3.75mg CO2.dm-2.hr-1.While those in the two hybrids of P.simonii were respectively 3—4×103 Lux,4—5×104 Lux and 2.25—2.52mg CO2.dm-2.hr-1.The diurnal changes of net photosynthetic rates of the studied four hybrids showed bimodal curve's patters from July to September,but monomodal patter in October.Their highest net photosyntheic rates appeared in July (15—19mg CO2.dm-2.hr-1),the lower ones appeared in June,August and September (10—15mg CO2.dm-2.hr-1),and the lowest in October (3—7mg CO2.dm-2,hr-1).Under the similar environmental condition,the net photosynthetic rates of the two hybrids of P.simonii were higher than that of the clones of Algeiros.However,the growth rates and biomass of the latter were rather higher than the two hybrids of P.simonii,because of their larger total leaf area.Therefore,it is feasible to determine the growth potantial of Populus seedlings according to the magnitude of both net photosynthetic rate and total leaf area. Related Articles | Metrics Cited: Baidu(36) Select SAWFLIES OF THE GENUS DIPRION FROM CHINA (HYMENOPTERA,SYMPHYTA:DIPRIONIDAE) Xiao Gang-rou;Huang Xiao-yun;Zhou Shu-zhi null    1983, 19 (3): 277-283.   Abstract （603）      PDF （448KB）（571）       Knowledge map    Save The present paper describes five species of sawflies of the genus Diprion from China.Of which four are new to science and one is recorded for the first time in China.All the type-specimens are preserved in the insect collection of the Division of Forest Entomology,Forest Research Institute,Chinese Academy of Forestry. 1. Diprion Liuwanensis Huang et Xiao sp.nov. The new species is closely related to Diprion hutaoharernae Smith;but it differs from the latter in the following points:Apical portion behind pterostigma of fore wing of female infuscated;lancet longer,with 11 annuli; ventral lobes 2—6 rather deeply emarginated,7—11 truncated;scopal pad shorter,not in the shape of sausages. 2. Diprion wenshanicus Xiao et Zhou sp.nov. The new species is close to Diprion hutacharernae Smith;but it distinguished from the latter by lancet with 11 annuli;teeth on annuli smaller;ventral lobe 2 with its hind angle projecting as a mammilla;annuli 3—5 slightly emarginated,scopal pads storter.not sausage-shaped. 3. Diprion tianmunicus Zhou et Huang sp.nov. Body elongate,lancet narrower and longer,distance between annuli 1 and 2 particularly widened,annuli 3 and 4 divergent dorsally,ventral lobe 2 rather deeply emarginated,scopal pads long oval in shape.By the conbination of all above characters the new species may be separated from Diprion similis (Hartig) and from Diprion hutacharernae Smith. 4. Diprion nanhuaensis Xiao sp.nov. The new species is very similar to Diprion hutacharernae Smith,with the following principal exceptions:in the female,most clypeus,supraclypeal area,most mesoscutellum,and metascutellum black;lancet with ventral lobes 2—5 imarginated;scopal pads shorter,not in the shape of sausages;in the male,labrum yellowish brown; abdominal tergite 1 with only median portion punctured;penis valve with apex slightly flat and with ventral side emarginated not as deep as that of Diprion hutacharernae Smith. Related Articles | Metrics Select STUDIES ON THE WOOD PROPERTIES AND USES OF THE GENUS PAULOWNIA Cheng Jun-qing null    1983, 19 (3): 284-291.   Abstract （390）      PDF （590KB）（416）       Knowledge map    Save Paulownia Sieb.et Zucc.is a native genus of Eastern Asia.It has been introduced into Europe,America and Australia.This genus consists of about 9 species and 2 varieties which all of them grow in China.In order that the trees grow very fast,and the timbers provide with excellent physical properties (e.g.,stable in dimension,poor in thermal and electrical conductivity,good in resonance,etc.) and have been utilized universally,we are now making great efforts to plant them in large proper areas as one of the most important commercial timbers. Paulownia timbers have been used extensively through experience to make Chinese string instruments (sounding boards),chests,insulators,carvings and so forth.In ancient times,owing to the scientific research conditions were confined timbers for making wood products were selected only depending on wood craftmen's experience.So that a systematical and comprehensive study on anatomical characters and chemical,physical and mechanical properties of paulownia wood is needed and has been done in this paper.The purposes are: 1. To obtain the scientific experimental data of wood properties; 2. To make verification or clarification of some doubtful or mistaken popular traditions and plagiarized records of wood properties or uses (It is said that paulownia wood possesses the high-classed qualities of resistance of decay and abration,non-permeable to fluid,etc.),but the opposite experimental evidences have been shown from our tests. 3. To propose some desirable timber uses according to the appropriate wood properties. Related Articles | Metrics Select FORESTATION AND PLANT TISSUE CULTURE Wang Huai-zhi null    1983, 19 (3): 292-301.   Abstract （475）      PDF （658KB）（628）       Knowledge map    Save This reivew is a survey in tissue culture of forest trees and the methods of clonal propagation of woody plants.Tissue culture offers an important technique for the rapid clonal propagation of forest trees.So far about 124 species belong to 30 families of woody plants have been regenereted as plantlets.Significant progress has been made in the past six years in vitro propagated conifers.In addition,a list over 70 species of woody plants may be cloned by somatic embryogenesis. The three principal types of clonal propagation of woody plants were discussed:aseptic shoot cuttage,organogenesis and embryogenesis.Eucalyptus (Eucalyptus leickow №1) regenerated in vitro via embrogenesis has been applied to forestation in Guangxi Region of our country. Finally,materials of the woody plants propagation were briefly reviewed in the 5th IAPTC. Related Articles | Metrics Cited: Baidu(9) Select A METHOD OF EVALUATING REGIONAL PLANNING PROJECTS Dong Wen-quan;Shi Zhu-xian null    1983, 19 (3): 302-309.   Abstract （615）      PDF （329KB）（519）       Knowledge map    Save During the planning of regional projects,common problem usually occurred in discussion is how to illustrate differences among them objectively and intuitively.In this paper,solution is attained by the theory of quantification and the computer simulation technique. Related Articles | Metrics