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Some Problems in Ecological Aricultural County Planning On the Conformable Functions of Agroecosystem A preliminary report on the ecological performance of Desmodium heterocarpum DC vat．strigosum Van Meeuwen Effects of elevated CO2 concentration and nitrogen deposition on the biomass accumulation and allocation in south subtropical main native tree species and their mixed communities. Responses of soil properties to ecosystem degradation in Karst region of northwest Guangxi, China. Research Advance in polyphosphate-accumulating microorganisms in enhanced biological phosphorus removal process A discussion on basic content and evaluation index system of agroecosystem health Research advances in mechanism of high phosphorus use efficiency of plants Conservation tillage systems in North America and their significance for China Morphology of wheat roots under low phosphorus stress Variation of some characters of Songnen grassland after firing in different seasons Fluxes between agroforest ecosystem and low level atmosphere Accumulation,distribution and interaction of phosphorus and zinc in wheat cells Effect of intercropping on soil erosion in young citrus plantation —— a simulation study Leaching loss of nitrogen in rice field N and P balances in farmland ecosystem and their response to fertilizers Inhibiting effect of Sphaerellopsis filum on Triphragmiopsis laricinum Enzyme activities in snail, Oncomelania hupensis from river beach and its agro-forestry systems Relationship between distribution Patterns or Aphis gossypii and its natural enemies Dynamic models of yak liveweight and its intake in alpine meadow ecosystem Variation of oncomelania density in forest-agrosystem before and after flood periods and its control strategies The assessment system of mangrove ecosystem health applying the PSR model:a case study of Guangdong Province Expression Profile Analysis of Maize Resistance Under Osmotic Stress Induced by Secondary Metabolites of Endophytes Cloning and Expression Analysis of Gene Encoding 1-Deoxy-D-xylulose 5-Phosphate Synthase in Gentiana rigescens High-level Expression of a Type 2 Metallothionein Protein（HcMT）from Halostachys caspica in Escherichia coli and Its Metal-binding Ability Research of Transferred Synthetic Nattokinase Gene in Tobacco Genome Research Progress of Improving the Actinomycetes Secondary Metabolite Production Method Isolation and Expression Analysis of Two cDNAs Encoding C4H Homologues from Gossypium arboreum New Steroidal Glycosides from Ophiopogon japonicus Chemical Constituents from Fruits of Rosa davidii Genetic and Microsatellite Analyses of a New Elongated Uppermost Internode Gene Teui2 of Rice New Discoveries of Phaeophycean Fossils in the Early Cambrian, Haikou, Kunming,Yunnan, Southwest China The Correlation Between the Volatile Organic Compound Emissions and the Vegetation Succession of the Ecosystems in Different Climatic Zones of China Phospholipases in Signalling Transduction of Higher Plants A Study on the Anatomy of Vegetative Organs of the Gymnotheca Decne. (Saururaceae) in Relation to Its Systematic Position Karyotype Analysis in Lycoris rosea Traub et Moldenke Studies on the Microstructure and Ultrastructure of Photosynthetic Apparatuses in Azolla The Floristic Characteristics and Geographical Distribution of the Rosaceae in Xizang Cytological Studies on Some Plants of Sichuan and Neighbouring Regions (I) Some New Taxa of Euglenophyta from Xizang (Tibet)