This paper is presented as a summarized conclusion of the discussions on “The Eco-environmental Construction in the Great West Development",which were published in 2 successive issues of “Scientia Silvae Sinicae". In this paper the concept and content of eco-environmental construction and its place and significance in the Great West development strategy are briefly expounded. Six basic principles which should be followed in eco-environmental construction in the Great West are put forward: the eco-environmental construction should be regionally and site specific and oriented to specifics of environmental damages; the natural protection or conservation should be put as the first priority with high respect to the nature; multipul measures chould be implemented with the forest/grassland rehabilitation as the basic measure;the ecological and economical interests should be combined together with the emphasis put on ecological effect; the all round planning should be made with system of coordinated measures to ensure successful improvement; the financial input should be enlarged and the mass participation of the people should be encouraged. In the last section some problems having emerged in the implementation process and some points with diverse opinions were discussed: the management orientation of the “Natural Forest Conservation Project"; the selection of vegetation types in implementing the “Cropland Convesion to Forest/Grassland Project"; the methods and techniques for forest/grassland vegetation construction; the relationship between eco-environmental construction and water resources.

The present study was conducted in the secondary subtropical evergreen broad-leaved forests at altitude 1 650～1 670 m in Mt.Wawushan National Forest Park,southwestern China.In order to understand stand restoration dynamics,the stand structure in three permanent 004hm² plots for 3～4 times were recorded from 1982 to 1997 and expounded the changes in 15 years about tree composition,important value index,several diversity indices,structure and volume productivity of both communities and populations.The results were followed:11 tree species disappeared and about another 10 species entered into tree layer in the stand,keeping tree layer dynamic equilibrium and developing tree species diversity.The dominant species,Castanopsis platyacantha,assumed the superior status,but its important value(Ⅳ)was decreased.The position of secondary dominant species,Schima sinense and Lithocarpus hancei, are gradually enhanced with gradually increased Ⅳ.The changes of densities,DBH and height distribution of tree populations displayed that the secondary evergreen forest was developed from past single or double dominant tree species to double or three dominant trees,from single tree layer to multiple levels in vertical structure.And the resulting community becomes more complicated and more stable.The growth rates of average height and DBH of all main trees were 24～48 cm·a^-1 and 034～110 cm·a^-1,respectively.According to the differentiation of growth,the main trees could be divided into three growth groups of species:fast-growing group including species of Schima sinense and Acanthopanax evodiaefolius var.gracills,slow-growing group of Machilus pingii and Lithocarpus hancei, and the group in between of Castanopsis platyacantha and Cyclobalanopsis myrsinaefolia. Volume productivity of the dominant population increased firstly and then decreased,but the secondary tree population increased quickly all the time.Volume productivity of all tree population in 1997 was up to between 218 m3·hm^-2 and 235 m³·hm^-2,and the change of dominant population was a key for community productivity.The relations of DBH,height growth and volume productivity in various density of the main tree populations indicated that the densities was one of the most important factors in fluencing productivity of tree populations under common environment with the interactions among tree populations.It is suggested that there is no contradiction between tree species diversity conservation and high volume productivity in forest restoration process.

Maowusu sandland is classical one of arid and semi-arid sandland in China.Water is the most limited factor there.The distribution pattern and productivity of terrestrial ecosystem are greatly affected with the future global severer change,especially global precipitation change.It is investigated for the response of physiological ecology of A.ordosica seedlings,a dominant shrub in Maowusu sandland,to the global precipitation change by artificially controlling four water supply gradients.The results show that the diurnal changes of photosynthetic rate,transpiration rate,stomatal conductance,intercellular CO₂ concentration,leaf temperature,solar energy utilization efficiency,and water utilization efficiency of A.ordosica seedlings show significantly different under different water supply treatments.The seedlings have low stomatal conductance and transpiration rate by shutting stomata so as to lower losing water by transpiration,mainly due to severe water stress in the deficit water supply,but high stomatal conductance,intercellular CO₂ concentration,transpiration rate and low leaf temperature by opening stomata so as to increase photosynthesis in full water supply.So the seedlings show different physiological ecological adaptation strategies under different water supply.The fluorescence efficienc increases with the increase of water supply,which explains on mechanism why photosynthesis increases with the increase of water supply treatments.The analyses of backward eliminated variable indicate that the number of main factors which restrict photosynthetic rate of seedlings decrease with the increase of water supply.PAR and leaf temperature are most restricted factor in full water supply,and transpiration rate,intercellular/air CO₂ concentration margin and PAR in middle water supply,but transpiration rate,stomatal conductance,intercellular/air CO₂ concentration margin,leaf/air temperature and air temperature in deficient water supply.

This paper reports the method of partitioning and purifying plasma membrane from roots of woody plants of Paulownia by improving the method of preparing plasma membrane by aqueous two-phase partitioning in herbaceous plants. The main improvements are adding ascorbic acid and increasing an amount of insoluble pvpp(polyvinylpolypyrrolidone) from 0.05%～0.1% of herbaceous plants to 0.6% in this homogenization medium, and then again collecting the plasma membrane from the lower phase after the first aqueous two-phase partitioning. Through determining the different kinds of marker enzymes of plasma membranes and organelles, that plasma membrane preparations of high yield and purity were easily obtained in aqueous polymer two-phase systems mainly constituted by 6.3% Dextran T-500 and 6.3% polyethylene glycol 4000. This method lays the foundations for the studies on the relation between the principles of roots absorption ions and growth, development of a woody plant at cellular and molecular level.

The forest ecosystems of sharptooth oak (Quercus aliena var.acuteserrata Maxim.),Chinese pine(Pinus tabulaeformis Carr.)and Armand pine(P.armandi Franch) in Mt. Qinling including soil layer 0～60cm contained total nutrient elements 29.2500～3901739t·hm^-2,which put in order sharptooth oak>Chinese pine>Armand pine stand,with percentage of soil 9310%～99.39% and of vegetation 057%～300% and of litter 010%～199%.The total nutrient accumulation contents of the ecosystems were Mg>Ca>K>N>P in the sharptooth oak stand,Ca>N>K>Mg>P in the Chinese pine stand and K>N>P>Ca>Mg in the Armand pine stand,but which of vegetation and litter were Ca>N>K>Mg>P in the sharptooth oak stand,N>Ca>K>Mg>P in the Chinese pine stand and N>Ca>K>Mg>P in the Armand pine stand.The average standing crop,average stocked volume and average nutrient accumulation contents of arbor layers among the three stands were 120483t·hm²,129.384m³·hm^-2 and 1226.9kg·hm^-2 respectively,in which the sharptooth oak stand with higher 6020%,35.50% and 7436% respectively than average was the largest and Armand pine stand was the smallest among the three stands.The sharptooth oak stand average production and average volume increment were 7.423t·hm^-2 and 6.743m³·hm^-2,which were higher than average 5420% and 29.58% respectively,among them Armand pine stand was lowest.The different organs among the three stands have different nutrient percentage contents.The nutrient accumulation contents and its' distribution of different organs among different stands have marked difference,those in arbor layer put in order barks>stems>roots>branches>leaves to sharptooth oak stand,branches>needles>roots>stems>barks to Chinese pine stand and branches>needles>barks>stems=roots to Armand pine stand;the nutrient accumulation contents of different organs were sharptooth oak>Armand pine>Chinese pine stand in leaves or needles and roots,Armand pine>Chinese pine>sharptooth oak stand to N,P and Mg and contrary to K and Mg in branches,sharptooth oak>Chinese pine>Armand pine stand to determined elements except to Mg Armand pine>Chinese pine stand in stems,sharptooth oak>Chinese pine or Armand pine stand to determined elements and Armand pine>Chinese pine stand to N and Ca contrary to P and K similar to Mg in barks;the nutrient accumulation contents of Ca took 50% of the total contents in sharptooth oak stand,but took 24% and 28% of those in Chinese pine and Armand pine stand respectively.The average standing crop and its nutrient accumulation contents of underplants among three stands were 1553t·hm^-2 and 531kg·hm^-2 respectively,in which sharptooth oak stand with higher than average 79.65% and 69.49% respectively was the largest and armand pine stand was the smallest among the stands.The average standing crop and average nutrient accumulation contents of litter among the stands were 17.475*!t·hm^-2 and 5025kg·hm^-2 respectively,the former put in order Armand pine>Chinese pine>sharptooth oak stand and the latter Chinese pine>Armand pine>sharptooth oak stand,but sharptooth oak>Armand pine>Chinese pine stand according to annual falling litter and sharptooth oak>Chinese pine>Armand pine stand to nutrient percentage contents.The standing accumulation contents of sharptooth oak,Chinese pine and Armand pine stand in soil layer 0～60cm were 3877657,27788.0 and 20922050kg·hm^-2 respectively,among them have largely difference of different soil layers in the three stands.The annual nutrient uptake,return and store of the sharptooth oak,Chinese pine and Armand pine stand were 3344,147.2 and 2643kg·hm^-2,195.5,66.9 and 841kg·hm^-2 and 138.8,804 and 1802kg·hm^-2 respectively with difference of the determined elements.The total nutrient return rate in the sharptooth oak, Chinese pine and Armand pine stand was 0585,0454 and 0318 respectively.The nutrient contents of Ca in stems of the sharptooth oak stand was near to 4 and 7*!times as in stems of the Chinese pine and Armand pine stand respectively;the nutrient accumulation contents of K,Ca and Mg in barks of the sharptooth oak stand was 4 and 4,19 and 14,5 and 5 times as in barks of the Chinese pine and Armand pine stand respectively,the biomass standing crop and nutrient accumulation contents of stems and barks in the sharptooth oak,Chinese pine and Armand pine stand respectively took 56%,67% and 57%,24% and 53%,28% of the total biomass and accumulation contents of arbor layers,the nutrient loss of the three stands was 1425.6,2044 and 197.5kg·hm^-2 respectively because of felling and using.The larger proportion of nutrient accumulation contents(especially Ca and Mg)in stems and barks of sharptooth oak stand lost by felling and using to might be cause leading to the soil acidification and structure destruction and final fertility decline.

This paper applied the formulas of Penman and the forest ecosystem evapotranspiration which is deduced in terms of theorization to calculate the potential evapotranspiration and the evapotranspiration of the monsoon evergreen broad-leaf forest in Dinghushan, Guangdong Province. The results are given as follows: 1.The annual average potential evapotranspiration of the monsoon evergreen broad-leaf forest in Dinghushan is 987.5 mm and is 47% of the corresponding period rainfall. The highest is in July and the lowest is in February. This is mainly consistent with the variations of temperature, but is detained with the rainfall. 2.The annual average evaporation of free water is 1194.5 mm. The potential evapotranspiration is much smaller than the evaporation of free water in dry season while the both are very close in wet season. So the parallel of both is a referenced index for divieded dry and wet season. 3. The annual average evapotranspiration by theoritic formula is 951.9 mm and is nearly equal to the potential evapotranspiration. It is 45.3% of the corresponding period rainfall. 4. The annual average total runoff the monsoon evergreen broad-leaf forest in Dinghushan is 1103.8*!mm and the coefficient is 0.52. The annual average variation of store water is 38.9 mm. The annual average evapotranspiration by water balance is 960.1 mm and is very close to by theoritic formula. The system error is under 1% in three years. It has a preliminary result that the theoritic formula is worth spreading method for calculating the evapotranspiration of forest ecosystem.

The vertical distribution and seasonal change of leaf area were studied in intensive and extensive culture poplar plantations. The result showed that the cumulative leaf area index(CLAI)of intensive culture trees was obviously higher than that of extensive culture trees during the growing season. According to the sample trees, the weighted mean of leaf area index in two stands was 3.0362 m²/m² and 2.1786 m²/m² respectively. Seen from the seasonal dynamic of leaf area, the intensive ones showed relative longer growing season than extensive ones. The higher leaf area and longer growing season contributed to the higher productivity in the former. The vertical distribution of CLAI in two plantations can be accurately simulated by the relative models according to the observing data. Even in the uniform plantation where the difference of leaf area in different individuals obviously existed, the leaf area appeared positive relation with its diameter at breast height(DBH).

In this paper, 50 species of desert plant in northwest area of China were studied. Applying to the Analytical Hierarchy Process (AHP) method, we constructed the synthetic assessment system conservation grading of Chinese rare and endangered desert plants. In this system, there are 4 assessment indexes: B₁: Distribution, B₂: Taxonomic position, B₃:Biological index, B₄:Available value. The weight of each index is gotten through judged matrix according to AHP. The assessing value of distributive index and taxonomic index are based on each species distribution area and taxonomic position. The biological index assessing value is embodied from each species' belonging: tree, shrub, perennial herb or annual herb. There are 4 index variables to stand for available index assessing value, they are drug value, forage and edible avail, fuel avail and other avail. The quantitative study results indicate: 50 species of desert plants are divided into 4 conservation grading. The species belonging in the first conservation grading are Betula holophila, Ammopiptanthus nanus, Syringa pinnatifolia var.alashanica, Tamarix taklamakanensis, Tetraena mongolica, Colophaca soongoria and Hippolytia kaschgarica,occupying 14% of all 50 species; Gymnocarpos przewalskii and other 21 species are listed in second conservation grading, occupying 44% of the total; Holoxylon ammodendendron and other 18 species are listed in third conservation grading, occupying 38% of the total; Brachanthemum pulrinatum and Halimodendron halodendron are out of grading.

In this paper, the condition of vegetation, the configuration of soil and the feature of earth surface are considered as the three aspects for selecting evaluation indicators of sandy desertified land, and a mathematical evaluation model on sandy desertified land was set up. Meanwhile, considering the ratio of non-desertified land area and different degree sandy desertified land areas, a regional warning model of land desertification level was given out. This warning model is testified to be applicable in 12 provinces of northern China.

The genetic diversity of chestnut was studied by RAPD molecular markers. The RAPD standardized procedure and the fingerprints database of chestnut were established, which was the principal basement of chestnut breeding. The precise and reliable method identified the chestnut variety was supplied.　With the 16 primers, 119 bands were produced. The 69 bands out of the 119 were polymorphic(58%). The fingerprints database of 46 varieties was established and the optimal combination of primers for these varieties identification was summarized. It was shown that the four primers, out of the 16 primers which can produced the polymorphic bands, could be used to distinguish the 46 varieties tested effectively. The optimal combimation of polymorphic loci was detected for variety discrimination. In order to summarize the better combination of primers, the genetic distance matrix was calculated so as to indicate the particularity of primers combination.

Since 1989,FAO project GCP/CPR/009/BEL of the Three North Shelterbelt Programme has assisted in introducting more than 650 poplar clones.This material has been stored in clonal banks,and parts of it is being tested in field clonal trials in different sites of Korqin sandy lands.This paper summarizes the preliminary results from four main trials.23 clones had been selected by multiple evaluation consisted of 5 main tactor indexes and 2 secondary tactor indexes from contrast trials based on primary aelection.The results showed that the growth increment of clones Jian 10^# (P.×euramericana cv' ND182),Xiaohei 8401 (P.simonii-Baicheng × P.nigra-Aertai 8401),Bailin 2^#(P.nigra × P.pyramidalis),Euro-American I-M (P.euramericana cl.“I-M”),Zhonglin 86-22(P.Zhonglin 86-22),Heilin 1^#(P.xiaohei × P.p15A cl.),Liaoza 2^#(P.simonii × Xiaozhuannica cl.Liaoza-2),Nixing × Shanhaiguan (P.nigra × Puplus deltoides cv.“Shanhaiguan”),Zhongchi Heixiao(P.nigra × P.simonii cv Zhongchi'),Faku 1^#(P.simonii × Xiaozhuannica cl.Faku-1),etc.,was obviously beyond Baicheng 41^#(P.sinonii × Xiaozhuannica cl.Baicheng-41)and Baicheng 2^#(P.simonii × Xiaozhuannica cl.'Baicheng-2),which were the local main tree species.Meanwhile,cold resistance,disease and pest resistance,and stem form of these clones also behave prominently.So the above clones are very suitable for planting and extending in Korqin sandy land.

This paper introduces a new method of updating the natural forest resource map and related information data automatically by computer,and it is fit for natural forest management in north China.Using this method,the natural forest resource map and related information data can be updated simultaneously and the problems made by the traditional forest resource information management system can be solved.

Based on the data of forest fire accounting and biomass estimation for every province,and employed emission factor method and emission ratio method,we estimated the amount of CO₂、CO and CH₄ released from forest fires to be 8.96 Tg C/a、1.12 Tg C/a and 0.109 Tg C/a,of which the components of undergrowth and litter contributed 39 %,47 % and 40 %,respectively.For each province,the amounts of CO₂,CO and CH₄ emission were dominantly determined by fire area.The contribution from Heilongjiang,Yunnan and Neimenggu provinces were more than 80*!% where fire occurred very frequently.CO₂ and CH₄ emissions from forest fire accounted for only 1.2 % and 0.35*!% of total national emissions,respectively.CO₂,CO and CH₄　emissions from froest fire in China were 0.3 %,0.5 % and 0.01 % of global emission from forest fires.

The branches of Broussonetia papyrifera Linn. were treated with neem extracts(Neem EC) as the food of the beetle (Apriona germari Hope), the effects of neem extracts on the oviposition and egg hatch of the beetle were investigated. The testing pair beetles were put into the plastic containers with a diameter of 25 cm and of a height 25 cm and covered with iron screen. During 15 days' testing period, the average egg number laid per pair beetles per day in treated group (7 pairs), which were fed on branches treated by neem extracts containing 50×10^-6g/mL azadiractin was 2.00±1.56 and that in the control group (7 pairs) was 10.33±3.33. T-test showed significant difference in the values of the average egg number laid between treated and control groups. In the test with a dosage of the neem extracts containing 100×10^-6g/mL azadirachtin, in the treated group (7 pairs), the beetles began to die on the fifth day and all the beetles were died on the eighth day, their average egg number laid per pair for the living beetle pairs per day, was 1.00±1.41 and that for the control group was 13.73±2.90. T-test showed the difference between the two values was significant. The hatching rate of the eggs laid by the beetles, which had fed on the treated branches with a dosage of neem extracts containing 50×10^-6g/mL azadirachtin, reached 33.3% at the nineteenth day. However, that of eggs laid by the control beetles was 98.9% on the ninth day. During a 24 days' choice test of feeding, the branches were treated with a dosage of the neem extracts containing 100×10^-6 g/mL azadirachtin and the average food taken by the beetles in the treated group (7 pairs) was 3.53±0.38g per pair per day and that on the control group(7 pairs) was 3.42±0.60g per pair per day. T-test showed that the difference between the two values was insignificant. It indicated that the beetle could not distinguish the food treated with neem extracts, that is, neem extracts is not an antifeedant for the beetle. Based on the above results a new way using neem extracts to control the beetle was put forward and discussed.

Based on 135 actual data by the investigation of 45 plots and 225 sample plots in Qinling to the maximum crown density (D) of easily burning layers, to the amount of the surface burning material(W) and to the absolute water-content ratio (μ) in the surface burning material, and by means of dissimilarity analysis method, 45 plots we have investigated can be obviously divided into 6 groups. According to differences among these groups, forest potential fire behavior in Qinling mountains crown fires can be divided into strong crown fire type, weak crown fire type and no crown fire type based on the maximum crow density of easily burning layers, separated by indices D 0.11 kg/m³ and 0.37kg/m³ respectively; the intensity of surface fire can be determined by the μ and W factors and be divided into 3 classes, the strong surface fire and the medium surface fire, separated by indices W 1.40 kg/m² and indices μ 40% respectively. According to those, all potential fire behaviors of forest in Qinling can be divided into 9 growps, the strong crown fire and strong surface fire(D>0.37 kg/m³,W≥1.40 kg/m², μ<40%), the strong crown fire and medium surface fire (D>0.37 kg/m³, W≥1.40 kg/m², μ≥40% or W<1.40 kg/m², μ<40%), the strong crown fire and weak surface fire(D>0.37 kg/m³,W<1.40 kg/m²,μ≥40%), the weak crown fire(0.11 kg/m³≤D≤0.37 kg/m³) and strong surface fire, the weak crown fire and medium surface fire, the weak crown fire and weak surface fire, no crown fire(D<0.11 kg/m³) and strong surface fire, no crown fire and medium surface, and no crown fire and weak surface fire respectively.

By expounding public attribution of forest ecological construction, the paper proves theoretic mechanism about designing forest ecological and environmental maintenance taxation and point out that levying rate of tax should draw support from government, which we can change economic externality into economic internality for forest ecological construction. From this, an effective capital circuit can be set up in order to promote sustainable development of forest ecology in China. Furthermore, the paper demonstrates the principle of taxation, the scope of taxation and transfer of tax payment in designing rate of taxation

To look for the relationship between wood structures and wood dyeing effects is a more important research field developed in recent years. Eleven parameters of wood structure and their wood dyeing effects for 34 pieces of sample panel from 5 trees of Chinese white poplar from plantation were examined based on the data to carry on the multiple regression analysis. The regression results show that each variable of wood dyeing effects has higher relationship with the wood structures, and the multiple correlation coefficients between each variable of wood effects and wood structures are 0.4836～0.7998; the main factors of wood structures influencing wood dyeing of Chinese white poplar are proportion of wood ray, proportion of vessel and proportion of wood fiber according to comparing the standardized regression coefficients of multiple regression equation.

The percolation threshold of electrically conductive function was studied by mixing adhesive elements with conductive elements and then laminating with wood elements together to form wood-based composite panels.The results showed that the threshold values were about 8%～14%,and the spreading content and filling content were correspondingly about 14%～25% and 12%～20%,respectively.The uniformity of conductive function was better once the percolation phenomena occurred.Additionally,some mechanism and numerical relationship should be further researched.

The effectiveness of fire resistance,rot resistance,dimensional stability as well as MOE/MOR of masson pine and poplar treated with FR-1,FR-2 and PF resin was briefly conducted in this article.The limited oxygen index (LOI) of masson pine treated with FR-1 was 61% at the retention of 34.5 kg/m³.The retention of which meet fire test standard GB8625-88 was defined to 30～90 kg/m³ according to wood species and thickness of timber.Weight losses of treated masson pine and poplar were under or about 10% at the fire resistant retention.Anti-swelling effectiveness (ASE) of Pinus massoniana and Populus tomentosa treated with FR-1was 30.0 % and 46.0 % respectively at the retention of 75.6 and 93.5 kg/m³.ASE of Pinus massoniana and Populus tomentosa treated with PF resin was 46.2 % and 41.4 % at the retention of 79.0 and 63.8 kg/m³ respectively according to Chinese national standard GB1934.2-91.MOE of Pinus massoniana treated with FR-1 was not significantly changed,however MOE of Populus tomentosa treated with FR-1 increased 6.1%.MOE of Pinus massoniana and Populus tomentosa treated with PF resin increased 10.6 % and 17.9 % respectively.MOR of both Pinus massoniana and Populus tomentosa treated with FR-1 was not significantly changed.

Based on the analyses on the relationships between average direct operation cost,accumulative total operation volumes and the years used of gantry crane for forestry used in Fujian,the proper regeneration time of gantry crane for forestry was calculated in the paper.The results showed that the proper regeneration time of gantry crane for forestry used in Fujian should be 10～15 year.

More than ten kinds of the pesticide injection syringes were compared,their designs,kernel techniques and mechanisms were studied.Their merits and demerits were compared.A new pesticide injection syringe-6HZ.D625B was designed.Its operating pressure≤25 MPa,pressure maintenance≥10 min,pump discharge volume is 2±0.2 mL/once,injection velocity is 1～2 s/once(done by hand),its weight is 6 kg,with six syringe needles.

Based on documental analyses and on-the-spot investigations,this article expounded the history of argument about wild species of ginkgo of West Tianmu Mountain in Zhejiang Province.were put forward.Several textual researches on the view of “as to the wild species,there are none.”

Eco-landscape forest,as a new kind of urban forest in modern cities,must play the functions on creating both beautiful landscape and nice ecological and environmental effects for improving the environment quality and living quality of citizens.The principles for ecolandscape forest construction in Shenzhen Municipotify are described briefly in the paper.

The growth responses of Gaozhou masson pine pulpwood to 4 thinning intensities were studied by comparative analysis.The results indicated that,under the identical characteristics of soil profile and ground vegefation in different thinning intensities,the variations of DBH and height under branch have significant differences with the maximum accretion of DBH and the lowest accretion of height under branch in 15 m×20 m stand,while the average increments of tree height and crown diameter were not obviously different.The aboveground biomass increments of 1.5 m×1.5 m and 1.5 m×2.0 m stands were higher than those of other stands by thinning within 3 years.Under the comprehensive survey of the growth responses of pulpwood to thinning intensity and the wood property for papermaking,the proper density of Gaozhou masson pine pulpwood should be 1.5 m×2.0 m with 15 years cutting period of return on hilly land of central Hubei Province.

the ecology of Aculus bambusae Kuang was studied in this paper,the results showed that the mite occurred in higher density in big year of bamboo forest than that in small year.It infested alternately with Schizotetranychus nanjingensis Ma & Yuan and Aponychus corpuzae Rimando in the same bamboo forest.No hibernation and activation were found in Fujian Province.Rainfall and natural enemies were important factors effecting the population dynamic of Aculus bambusae.The integrated management of the pest in moso bamboo forest was discussed.