The greenness lndices, albedo and temperature field of underlying surface with different forest cover percent were analysed using 5 channels data by NOAA satellite AVHRR transducer. The results showed, The forest cover percent was positive correlation with greenness indices; The greenness indices was negative correlation with the albedo; The greenness indices was negative correlation with maximum temperature; The albedo was positive correlation with maximum temperature. A new method was provided by using NOAA satellite data for studying the effects of forest on environment in the future.

Based on the analysis of the correlation between diameter and height of forest trees, in consideration of topographical and geomorphic features on flat farmlands, site index table and quantified site index table of Paulownia plantations are worked out respectively, with average DBH as dependent variable of trees within the highest diameter diameter class replacing average height of dominant trees, and with stand average age and some qualitative factors as independent variables, such as soil type, thicknes of soil layers, underground water level, and tree spacing in the row. Further, Paulownia plantations are divided into 14 site types. The results are universal suitable to the method of related management tables, the dividing of site types and the pre-evaluation of stand growth for main tree species on flat farmlands.

The juvenile-mature rank correlation of white elm tree height and DBH increment have been calculated according to the results of provenance test which was carried out for 10 years already. It was shown that phenotypic and genetic correlation was significant at 0.01 level. It suggested that the expression of white elm trees at the 4th year after plantation could be able to detect the expression of trees at the 10th year reliablly. And early selection would be appropriate from the 5th year, which was calcubated from the correlation gain and annual efficiency at different selection ages of white elm trees.

This paper first reports a mathematical statistic method by which selective precision can be increased when breeding population number is less than that of selective characters. By standardized data processing, correlation analysis and selection of variables, the predict contribution of 10 selection breeding objective in new poplar varieties to their economical income has been estimated and evaluated, regression diagnosis has been carried out for abnormal points of original data based on the analysis of residuals. With several policy-making schemes, new poplar variety NL-80105 has been selected whose synthetical characters, such as yield, tree form quality, resistance and wood property in the region of Huang-Huai-Hai have been improved on the highest level. The development of this new variety in Huang-Huai-Hai region will make economical profit of poplar wood to raise thirty-three thousand yuan per ha at 5-year-old.

The paper has made a systematic theoretical analysis and test on the relation of the forest belt line amount, length, the rate of preservation and the forest belt integrality using the way of probability theory. It has advanced that pledging the integrality of the forest belt, continuous forest belt line amount relate with the rate of preservation and forest line length; On the basis of theoretical analysis,the optimum design line amount schedule of the forest belt has been set up; The theoretical basis and concreting way on the design of the forest belt line amount has been proposed.

In order to improve the existing method of Beauveria bassiana Prodution, We made many-sided and explorative experimental researches on the relevant technical problems in the technology of brick type semi-solid fermentation culture method to mechanizedly produce Beauveria bassiana spore powder and deep-level liquid fermentation by means of carrier and achieved some success. The experimental results suggested:FL-85055 and FL-86004 were ideal prescriptions of liquid culture medium and the average spore output was 9.16 hundred million/ml and 8.15 hundred million/ml respectively,which was 1.85 times more than the production by the indigenous method with common 5% wheat skin soak; screened out Number C prescription of semi-solid fermentation culture medium and the average spore output attained 890.7 hundred million/g,which was 7.91 times more than the fungicide by the regular indigenous method with spore output 100 hundred million/g; selected out the ideal carrier FLT-8504 cultured by the semi-solid fermentation; the ratio of optimization combination of the culture medium, carrier and inoculation quantity was 1:3:6.

The sampling method in different forest land where the pests emerged in different times in the same Environment was used on establishing life tables of Saperda populnea L. Seven single generatien life tables were established in one year. This way spent shorter time as compared with the normal method accumulating life tables. The survivalship curves are the same, key factors are the same and the order of lethal ratio of each factor is nearly the same as compared with five tables at the same forest land in five years. This shows that the method accumulating life tables is feasible in practice.

This study deals with the circadian rhythms of sex pheromone production and release in the jujube leafroller moth Ancylis sativa Liu. The methods of extraction of sex pheromone glands (SPG) , vial washing collection and electroantennogram assay were used. The results showed that the sex pheromone production of the female moths were not significantly different in the first six days after adult emergence, and the peak of the content of sex pheromone in the glands was seen around 04:00 hours and the peak time of sex pheromone release was around 07:00 hours. The observation of male moth attracted by virgin female in the field indicated a good coincidence with the sex pheromone production and release in the laboratory.

It reviews the history of the Pinus Koraiensis "have been successful in introduction", "have been settled" in Daxinganling mountains,and of brewing to carry on productive spread, which is caused by error name "Mohe Koeran Pine".It shows that it is necessary to recongnize anew it after correcting the error name. The authors propose that introducing experiments should be carried on actively at present, but talking about success and spread may be not appropriate for such species introduction.

It is found that the internal temperature of the lumber dried by electric heat far infrarea radiation may be higher than the external temperature. The primary analysis is made. Under a particular condition, the rate at which the lumber reaches higher temperature internally than externally depends on its moiscure content (m. c.) and thickness. If the lumber is thick and contains more m. c. , the rate is slow and fast reversely. The rate also varies with lumber's internal structure, the dense wood is slow, and the loose one fast. The temperature between the internal and external wood is different based on the m. c. and thickness of lumber. The thinner the lumber and lower the m. c. , the smaller the temperature difference. Temperature of wet ball is more important in drying.To dry the medium-thick block the temperature is 50-65℃; to thick block, 60-75℃; and to very large square lumber, 70-85℃.

No. 244 and No. 5 open-pollinated seeds in primary seed orchard for Chinese fir (Cunning hamia lanceolata) grafting were used as the test material for studying the relationship between ultrastructural changes and seed vigour during germination. The result showed that No. 244 was high-vigour seed and No. 5 was low one. During germination of Chinese fir seeds, increase of number and rate of development of mitochondria (Mt), golgi body (GB) and rough endoplasmic reticulum (RER)etc. of the high-vigour seeds No. 244 were earlier and faster than that of the lower-vigour seeds No. 5, Resolution power, quantity of starch grain (ST) and quantity of liposome (L) were also more than low one. All these showed that there exist close relationship between changes of cell ultrastructural and seed vigour during germination of Chinese fir seeds.

Research on the rooting properties of 5 new clones of Populus euramericana shows: 1. The clones initiate a great number of root primordia, rooting early and with many lateral roots and long adventitious roots. The rooting percentages of these clones are high. The rooting performance is apparently better than that of the parents, P. deltoides Bartr. Cv. Lux and P. nigra. 2. The high general haritability of rooting percentages shows that rooting properties are mainly controlled by inherity. 3 . Temperatures from 20 to 25℃ are good for rooting. 4. Sufficienc water content of the cuttiug is the necessary condition for rooting, and water decifit is an important faclor of reducing rooting percentage. Whereas water soaking is a simple and effective method for increasing viability of the cutting.

6-8 years old Norway spruce grafting plants from 20-30 years old ortets were grown under either inductive condition, hot and dry (HD) , or non-inductive condition, cool and wet(CW). Next year after treated, 95% of the grafting plants treated under HD condition emerged male cones, 63% of them emerged female cones. While neither male nor famale cones appeared for the CW treated grafting plants. The samples for determination of gibberellins were taken two times. The interval between the two sampling occasions was 8 days. The average amount of GA, in the needles of HD treated plants increased from 6.4ng/g( fresh weight) on the first sampling occasion to 10.9ng by the second occasion, whereas decreased from 4.7ng to 2.7ng for CW treated plants(control). There was a decreasing trend of GA₄ content in both plants HD and CW treated, from 2.3ng and 3.2ng to 0.4ng and 1.7ng respectively. The contents of GA_S and GA₁ was less and only examined in few samples so that any relation between contents of them and flowering was found. The analytical results of GAS contents and its metabolism have been discussed in this paper.

Poplar canker, mainly caused by Dothiorella gregaria Sacc., a pathogenic fungus, which may cause canker diseases on 132 species and cultivars of poplar tree, is a serious disease in Shanxi Province. Twenty-four species and cultivars of poplar seedings coming from three nurseries were applied to the artificial inducing test of latent infection of poplar canker. The results of the experiment showed that among six induced species of fungi (Dothiorella gregaria, Cytospora chrysosperma, Phoma sp., Fusicoccum sp., Pestalotiopsis sp., Sphaeropsis salicicola) D. gregaria possesed the highest latent infection rate. It was proved that the disease development was closely connected with the relative expanding degree of bark and that the most faverable condition for occurrence of the disease was that when the relative expanding degree of bark decreased to 66-68%.

By the test of pine wilt disease dead wood submerged in hot-water, exposed to high temperature, natural drying of dead wood and hot evaporation of vapour etc. . KT50's and the temperature and exposure time required for 100% mortality are reported by the different temperature treatment. The results showed that time/mortality relationships were determined for treatment of pine wood nematode (Bursaphetenchus xylophilus) and the vector of pine sawyer beetle (Monochamus alternatus) in the dead logs (average diameter is 15.99±2.36cm). The thermal death point of the nematodes is 45℃ when the dead logs were submerged in hot-water and its thermal death point is 50℃ while the died wood exposed to high temperature. The died logs submerged in hot-water is more effective than the high temperature treatment and others. The exposure times in notwater were significantly reduced as water temperature above 45℃ (the thermal death point)was increased. When pine wilt disease dead logs submerged in hot-water at 60℃ in large dimension pool and tank treated for 2.30±0.50 hours, the mortality of B.xylophilus, and the vector of M. alternatus,Shirahoshizo insidiosus and Blastophagus piniperda all reached 100%. The methodes of treatment of pine wilt disease died wood exposed to high temperature, drying of wood and hot evaporation of vapour for control of pine wood nematodes and its vectores also vere introduced.

Funnel-shaped traps baited with attractants were employed to attract Monochamus alternatus Hope in the mixed forest in Sun Yat-sen Mausoleum, Nanjing, Jiangsu Province. The attractants were divided into type A and type B, and mainly composed of monoterpenes such as α-pinene, β-pinene and added alcohol etc. Except M. alterntus, many other pine borers, such as Shirahoshizo insidiosus Roelefs, Xyleborus mutilatus Blandford etc. were traped. The M. alternatus traped in the forest were inspected to be carried a lot of Bursaphelenchus xylophilus (Steiner et Buhrer) , It was showed that the attractants of M. alternatus would be used as a means of the integrated control of B. xylophilus disease, they would be applied to monitor the population dynamics of M. alternatus and the occurence, and spread of B. xylophilus disease as well.

This paper deals with the cause of the friction resistance of rafts and its affecting factors and advances the calculate method of the cofficient (Cf) of the friction resistance, which promoted the research on the problem of the runniny water resistance of rafts.