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Cytological Studies of Male Gametogenesis and Development in the Reciprocal Interspecific Hybrid F₁ of Dongxiang Wild Rice (Oryza rufipogon) and Oryza sativa Acacia melanoxylon Callus Induction and Shoot Regeneration System The Establishment of Agrobacterium-mediated Transient Expression System in Cotton Cotyledons Seasonal Variation in Contents of C, N and P and Stoichiometry Characteristics in Fine Roots, Stems and Needles of Larix principis-rupprechtii Spatial distribution characteristics and impact on spring maize yield of drought in Northeast China Effects of different leek cultivars on the growth, development and fecundity of Bradysia difformis Frey Influences of insecticides and herbicides on the growth of the biocontrol fungus Coniothyrium minitans Campbell Reｌatiｏnship ｂetween incidence ｏf Verticiｌｌiuｍ wiｌt ｏn egt and neｍatｏde pｏpuｌatiｏn in the rhizｏsphere sｏiｌ Study on production of bio-fungicide by using maize stock A primary study on the repellent activities of tree extracting solution against white ants Inhibition of the extractions of Stemona tuberosa Lour and Sophora flavescans on some plant pathogenic germs Synthesis and properties of rare earths photo-conversion materials in agriculture-used film Currentprogress 0f studies on Cistanche tubulosa Emergy analysis method of agro-ecosystem Research on maize higll-yielding culture mode with applying fertilizer in extractive quantity to control nonpoint-source pollution Index variations of structure and quality of black soil with a long-term located monitoring Influence of sludge and bacterial sludge on microorganism system in farmland soil A preliminary report on the ecological performance of Desmodium heterocarpum DC vat．strigosum Van Meeuwen Effects of the main ecological factors on gallnut yield Interactive effects of P deficiency and Al toxicity on soybean growth: A pot experiment with acid soil. Effects of exogenous melatonin on active oxygen metabolism of cucumber seedlings under high temperature stress. Effects of graft on lipid peroxidation and antioxidative enzyme activities of Capsicum annum seedlings under low temperature and weak light intensity. Dynamic distribution characters of herbaceous vegetation root systems in abandoned grasslands of Loess Plateau GIS-based forest fire risk zone mapping in Daxing‘an Mountains Landscape ecological evaluation of Fenglin Nature Reverse:Quantification and interpretation A discussion on basic content and evaluation index system of agroecosystem health Chemical mechanism of exotic weed invasion Effect of the combination of cadmium and UV-B radiation on soybean growth Research advance in ecotoxicology and environmental impact of veterinary medicines Selection of tree species composition in Shenyang‘s urban forest communities Exudation and accumulation of citric acid in common bean in response to Al toxicity stress Fluxes between agroforest ecosystem and low level atmosphere Effect of calcium and silicon on growth of and nutrient uptake by wheat exposed to simulated acid rain Light-ecological field of Larix leoptolois canopy Enzyme activities in snail, Oncomelania hupensis from river beach and its agro-forestry systems Quantitative characters of vegetative propagation and sexual reproduction of Puccinelliatenuiflora population on alkalized meadow of Songnen Plain Death causes from withering of Larix olgensis in Changbai Mountain area 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 Sequence Analysis and Prokaryotic Expression of GmGS1γ Gene from Nodules of Glycine soja