Table of Content

10 June 2002, Volume 21 Issue 3

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Species Diversity of Castanopsis eyrei Community at the Tiantai Mountain of Zhejiang Province.

Jin Zexin

2002, (3):  1-4,14. 

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Flora composition and species diversity features of Castanopsis eyrei community at Tiantai Mountain of Zhejiang Province were analyzed.According to the statistics from 10 sample plots,there are 122 species(including varieties) of 93 genus belonging to 48 families of vascular plants.In terms of geographical composition of seed plant genus,most of them are distributed in the temperate zone.The species diversity of shrub layer is the highest,the tree layer the second,and the herb layer the lowest in the vertical structure of the community.In terms of the specific-abundance distribution,the tree layer,the shrub layer and the herb layer plants all conform to the logarithmic series distribution,which shows that there are more open species than the enriched species,and that the community evenness is relatively low.The diversity order of the family-genus-species in the community is:genus-species diversity>family-genus diversity>family-species diversity.

Absorption and Accumulation of Heavy Metals,Sulphur,Phosphorus in Pinus taede Plantation in the Hilly Regions of Southern Jiangsu

Wu Yonggang, Jiang Zhilin, Luan Yiling

2002, (3):  5-9. 

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Absorption,accumulation and distribution of Pb,Cd,Cr,Cu,Mn,Ni,Zn,P and S elements in loblolly pine plantation in the hilly regions of southern Jiangsu province were studied.The results show that the storage of nine elements in the soil of the forest is in order of S>P>Mn>Zn>Cr>Cu>Pb>Ni>Cd,their contents in different organs of trees are quite different,being Pb 0.96～5.81,Cd 0.266～0.720,Cr 8.55～9 49,Cu 4.36～9.44,Mn 18.98～61.07,Ni 1.74～9.03,Zn 13.44～32.69,P 168～987,and S 446～1770(mg·kg^-1).Their accumulation ratios of elements in plants are in order of Cd >P>S>Cu>Zn>Cr>Pb>Ni> Mn.The accumulation amounts of Pb,Cd,Cr,Cu,Mn,Ni,Zn,P and S in the biomass of the community are 36.30,5.47,85.58,74.54,248.1,26.81,236.5,3268,and 8158 (mg·m^-2),respectively,of which the overground part accounted for 5.37%,10.60%,23.77%,15.99%,16.61%,12.38%,12.34%,24.85%,and 4712%,higher than underground part.The biological cycles of the elements in the community are described as follows:annual uptake is Pb 23.75,Cd 1.97,Cr 24.07,Cu 27.44,Mn 170.17,Ni 19.51,Zn 109.29,P 1721.69,and S 2843.14 (mg·m^-2).Annual return is Pb 12.70,Cd 0.68,Cr 1.66,Cu 10.49,Mn 70.72,Ni 6.46,Zn 40.60,P 257.61,and S 486.56 (mg·m^-2).The turnover periods of nine elements are 3,8,52,7,4,4,6,57 and 17 years respectively.

Relationship between Attributes of Field Margins and Biodiversity

Gu Weibin, Yu Zhenrong, Liu Yinhui

2002, (3):  10-14. 

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Biological community including carabids and spiders were investigated in 30 various fields margins and 10 related fields by pitfall trap in Quzhou area of North China Plain.It was concluded that biodiversity index and numbers of biological groups in field margins are higher than those in the related crop fields.There is a given relationship between the attributes of field margins and biodiversity.The control of structure and vegetation in field margins would be the possible way to protect natural enemy such as carabides and spiders.

Neighborhood Interrerence Index in Betula luninifera Community

Song Dingquan, Jiang Zhilin, Zheng Zuomeng, He Wenping

2002, (3):  15-17. 

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In the course of studying Betula luninifera community at Weimin in Fujian Province,the interrelation between the growth rate of B.luninefera and its neighborhood interference index has been analyzed and the relation of its size,neighborhood interference index and growth rate has been found.The results show that the influence of neighborhood interference index and growth rate has been found.The results show that the influence of neighborhood interference becomes weak gradually among the investigated trees whose breast height diameter is over 10cm.So it is suggested that B.luninefera at Weiming should be forested before the breast diameter reaches 10cm.

Effect of Allicin on the Microecological Preparation Strains

Hu Shangqin

2002, (3):  18-20. 

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Allicin was studied as inhibitor for Bacillus licheniformis,Lactobacillus bulgaricus,Streptococcus faecalis, and Streptococcus thermophilus of the microecological preparation.The result shows that the inhibition on the growth is obvious when the allicin is above 1.2%, for 4 hours.

Effect of Hydrophilic Gel and NPK Fertilizer on the Main Nutrient Characteristics of Polianthes tuberosa

Zhao Jiuzhou, Chen Jiemin, Zhou Aiqin, Wang Aihua, Chen Donghuan

2002, (3):  21-24. 

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To get high flower production of tuberose,growing media and NPK fertilizer proportion was determined accurately by polynomial regression quadratic equation (PRQE) in four elements.The partial derivatives from polynomial regression equation (Y₆) was utilized for estimating the maximum production of tuberose flower.Results revealed coding level X₁=-1.695, X₂=-1.122,X₃=0.311 and X₄=1.151,which are converted into doses of trial factors,are KD-1-Hydrophilic gel/sandy-soil (HG/SS)=0.652%,(NH₄)₂SO₄=14.39 (g穖^-3),Ca(H₂PO₄)₂稨₂O=25.75 (g穖^-3),and K₂SO₄=25.89 (g穖^-3).Therefore,Ymax =28.79 (number of flower穖^-2).Results revealed that plant height was significantly influenced by the application of three major nutrients.However,number of leaves/plant increased non-significantly with the increasing level of NPK and HG/SS.Number of bulks/clump was also influenced by N,P and K as well as HG/SS.Application of higher levels of NPK showed profound effect on increasing flower production (number of spikes穖^-2),and number of florets/spike.Therefore,higher doses of NPK are recommended for higher production of flower.

Ecological Characteristics of Amphipsyche proluta MacLachlan

Long Jianguo, Zhang Jianyun

2002, (3):  25-28. 

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Along 8km extent of the river down from the dam of Zhexi Reservoir in Hunan Province,the population of an insect named Amphipsyche proluta MacLachlan has been rising in great quantities every year.Based on previous reports on the life history and living habits of this caddisfly, the ecological characteristics of this insect, including its water environment for living, reaction to flowing speed and depth of water, its natural enimies situation,and influence from haman activities,are described specially in this paper.It provides theoretical basis for following study on the integrated management of this insect.

Small Stream Use and Its Future Changes in Rural Areas of Xishuangbanna,SW China

Wu Zhaolu, Zheng Han, Yang Zhengbin

2002, (3):  29-32. 

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Reclamation,fishing,damming,building reservoirs,and channelization,the existing models of small stream use in Xishuangbanna,SW China are discussed based on detailed survey in 25 villages among 7 nationalities. The small stream use is not only a simple economic issue,but also has bearings on village's flood and drought regulation,community physiognomy,and traditional culture promotion.According to the prevailing national policies for conservation and development,the indigenous people and the authors discussed together the possible change trends for small stream use:traditional fishing and water and land resources use will be continued while channelization and fishing with electric tools will be abolished. It is indicated that small streams are playing important roles in rural development and that models of small stream use have roots into traditional cultures. It is recommended that small stream management should be one of the key acts in regional ecological management.

Terpenoids in Higher Plants and Their Roles in Ecosystems

Peng Shaolin, Nan Peng, Zhong Yang

2002, (3):  33-38. 

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The terpenoids are one of the main types of secondary plant metabolization products,with wide distribution,structural diversity and chemical complexity.In this review,we introduce the types and distribution of terpenoids in higher plants,the ecological factors that affect the production of terpenoids,and importance of terpenoids in ecosystems.

Effect of Cones Picking on Broad-leaved Pinus koraiensis Forest in Changbai Mountian

Ji Lanzhu, Liu Zugen, Hao Zhanqing, Wang Qingli, Wang Miao

2002, (3):  39-42. 

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This paper illustrated the relationships between P.koraiensis and animal,and discussed the effect of cones picking on quantity and structure of animal, P.koraiensis regeneration,biomass,services,structure and succession,and nutrient cycle of the ecosystem.It showed that cones picking has damaged the integrity and function of ecosystem health in term of the concepts and characteristics of ecosystem health.The paper was aiming at the strategies to resolve the relationships between cones picking and ecosystem health maintaining in order to give scientific foundations for protection and management of broad-leaved P.koraiensis forest in Changbai Mountain.

Soil Mercury Pollution and Remediation Technique

Wang Xin, Zhou Qixing

2002, (3):  43-46. 

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This paper summarized research of mercury pollution at home and abroad in recent years.It mainly includes the mercury source,mercury forms,transportation property in soil.remediation type,remediation property and application of bioremediation are discussed.New thinking were put forward for synthetic treatment and bioremediation in mercury pollution soil.

Role of Protozoa in Activated-Sludge

Chen Shenggui, Xu Muqi, Yang Xiangping, Gan Yiping, Zhai Jiaji, Liu Weiyan, Shao Yongyi

2002, (3):  47-51,80. 

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Protozoa in activated sludge can improve the sewage treatment,reduce the mass of sludge and indicate the quality of effluent.The following effects are reviewed:① extretion of growth factors and extracellular polymers; ②preying on bacteria.Preying changes the structure of bacteria community,stimulates the growth of bacteria in flocs and benefits the sediment of the activated sludge.Protozoa grazing on fecal bacteria and in the suspended liquor is essential for the production of good quality effluent.

Woody Plant Architecture and Its Research in Plant Ecology

Chen Bo, Song Yongchang, Da Liangjun

2002, (3):  52-56,28. 

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Major contents of plant architecture and branching patterns within the crown are reviewed in this paper.Plant architecture is the basis for understanding of species morphological diversity.Major researches on branching patterns include not only development and growth of shoot and bifurcation density,but also the relationships between them and genetical mechanism,meristems and environmental change.To study the distribution of different modules at the level of shoot and their integration has become a new trend for revealing adaptive strategy of plant architecture at different habitats.

Effects of Enriched CO₂ on undergrourd Carbon Flow in the Plant-Soil System

Zheng Fengying, Peng Shaolin, Li Yuelin

2002, (3):  57-60. 

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Carbon flow into soil increased due to enhanced plant production under elevated atmospheric CO₂ concentration.Rhizosphere physiological procedures deciding carbon allocation under ground has changed:Root turnover and root exudation increased;symboints activity,and soil microorganisms biomass enhanced,etc.But the quantity of carbon flux to soil cannot be determined exactly.

Discussion on Urban Ecological Park

Zhang Qingfei, Zhang Junyi

2002, (3):  61-64. 

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Urban ecological park will improve urban greenland landscape,health and stability,form the key areas for biodiversity and natural conservation,supply the demand to get in touch with nature for residents through ecological approaches,such as naturalizing park,developing natural potency,restoring and rehabilitating plant communities with potential vegetation characteristics and introducing wildlife into parks.In this paper,the development,concept,characteristics,function and construction of ecological park were discussed,and the approaches for redeveloping existed parks into ecological parks were also put forward.

A Preliminary Study on Insect Biodiversity of Zhuanshan Lake Area in Siping

Zhao Zhuo, Ren Bingzhong, Xi Gengsi

2002, (3):  65-68. 

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The species composition and diversity of insects in five different habitats around Zhuanshan Lake in Jilin Province were surveyed from June to October,1999-2000.Approximately 5000 specimens were collected and 230 species belonging to 11 orders,86 families and 181 genera were recognized.Shannon-weiner biodiversity index(H'),Pielou'eveness(E) and similarity index(S) were adopted to analyze the insect diversity difference in different communities.The results indicate that the abundance,biodiversity index,eveness and similarity index are distinctly different among different habitats and months.But the insect diversity,eveness and richness in plot Ⅲ is highe than other plots.This is mainly related to the biological characteristics of insects and directly affected by environmental factors.

Eco-Environment Problems and Comprehensive Controlling Strategieses in Maqu County in the Upper Reaches of Yellow River

Qian Ju, Wang Genxu, Ma Jinzhu

2002, (3):  69-72. 

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With the abundant natural grassland resources,Maqu County becomes the important stockbreeding base in the upper reaches of Yellow River.Eco-environment problems,such as grassland degeneration,land desertification,water and soil loss,and water resource decrease were incurred by population increase and stockbreeding development.Under the trend of global warming,human factors,for example,over loading and grazing,irrational dieforestation,and low input,etc., were the direct and radical reasons to deteriorate the vulnerable ecoenvironment.Technological,legal,administrative and economic measures,such as afforestation,artificial grass planting,grassland water saving irrigation and fertilization,industrial structure,adjustment scientific and technical education,high efficient management and so on,should be taken to control eco environment synthetically in order to realize the favorable circulation of eco system and the sustainable development of regional stockbreeding.

Principles and Application of Environment Capacity Determination in Ecotourism Region-Case Studies on Jiuzhaigou and Huanglong

Yan Helin

2002, (3):  73-75. 

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Dynamic model of the logistic growth in ecology is applied in the ecotourism development of Jiuzhaigou and Huanglong.Point management countermeasures of environmental capacity in ecotourism region are put forward.

Ecological Restoration Model and Application for the Polluted Mada Lake in Shandong Province

Tian Jiayi, Pan Huaijian, An Jingbing, Gao Xia

2002, (3):  76-80. 

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Environment history of Mada Lake was retrieved based on literatures about this area.According to 20 years (1974-1995) monitoring on the water quality in the Mada lake,the history and present status of water pollution in this lake was evaluated,and the ecological destruction process was studied.Ecological restoration model and strategies were proposed for the polluted Mada Lake,and the consequence after 5 years of rehabilitation was also predicted.