Study on the influencing mechanisms of nitrogen and phosphorus nutrients on maize yield and quality in rainfed lands of the Loess Plateau ffects of nitrogen fertilizer rate and post-anthesis soil water content on characteristics of nitrogen metabolism and grain protein content in wheat Effect of soil surface mulching and N rate on dry matter and nitrogen accumulation and translocation of winter wheat In situ study on influence of different fertilization strategies for summer maize on soil nitrogen leaching and volatilization Study on chlorophyll meter-based variable rate fertilizer application and influence on winter wheat Effect of panicle nitrogen fertilizer on quality properties of different rice varieties Effect of nitrogen supply on carbon-nitrogen metabolism and kernel set in summer maize Effects of long-term cycling of organic nutrient on soil nitrogen supplying capacity in a red soil paddy ecosystem The different characteristics of soil fixed ammonium from south to north on the Loess Plateau Interactive effects of short-term nitrogen enrichment and simulated grazing on ecosystem respiration in an alpine meadow on the Tibetan Plateau Biological nitrogen fixation in the upper water column in the south Taiwan Strait during summer 2011 Effects of simulated nitrogen deposition on substrate quality of litterfall in a Pleioblastus amarus plantation in Rainy Area of West China Nitrogen deposition and Leymus chinensis leaf chlorophyll content in Inner Mongolian grassland Early effects of simulated nitrogen deposition on annual nutrient input from litterfall in a Pleioblastus amarus plantation in Rainy Area of West China Effects of nitrogen on photosynthetic characteristics and enzyme activity of nitrogen metabolism in maize under-mulch-drip irrigation Effects of nitrogen fertilizer methods on the content of Bacillus thuringiensis insecticidal protein and yield of transgenic cotton Influence of residues and earthworms application on N2O emissions of winter wheat Spatial heterogeneity of soil organic carbon and total nitrogen at small scale in subalpine meadow and Picea meyeri forest in Luya Mountain Effect of nitrogen concentration in the subtending leaves of cotton bolls on the strength of source and sink during boll development Nitrogen flows in intensive "crop-livestock" production systems typically for the peri-urban area of Beijing A review concerning nitrogen accumulation and leaching in agro-ecosystems of oasis Spatial and temporal variations of total nitrogen density in agricultural soils of the Songnen Plain Maize Belt Soil carbon, nitrogen and microbiological characteristics during bamboo high-speed growth Soil nitrogen and enzymes involved in nitrogen metabolism under different vegetation in Ziwuling mountain in the Loess Plateau, China Simulation of effects of warming on carbon budget in alpine meadow ecosystem on the Tibetan Plateau Effects of delayed irrigation at jointing stage on nitrogen accumulation and its allocation, and NO3-N migration in wheat Releasing characteristics of nonpoint source pollutants from straws under submerging condition Effects of Limitation of Nitrogen and Phosphorus on the Growth of Alexandrium tamarense Studies on the Growth Characteristics of Toxic Alexandrium tamarense (Hong Kong Strain Ⅱ ) Acidity and Inorganic Nitrogen Concentrations in Soil Solution in Short-term Response to N Addition in Subtropical Forests Response of Diameter at Breast Height Increment to N Additions in Forests of Dinghushan Biosphere Reserve Effect of Some Factors on Oxalate Content in Buckwheat Seedlings Effect of Climatic Factors on Nitrogen Fixation in Three Leguminous Trees PLANT GROWTH, NODULE NITROGENASE ACTIVITY AND PHYLLODE NUTRIENT CONTENT IN ACACIA MANGIUM ENHANCING EFFECT OF MANNITOL ON NITROGEN FIXATION ACTIVITY IN ANABAENA UNDER OSMOTIC STRESS ENHANCING EFFECT OF MANNITOL ON NITROGEN-FIXING ACTIVITY OF BLUE-GREEN ALGAE ANABAENA 7120 UNDER NaCI STRESS PHYSIOLOGICAL BASIS OF MITIGATIVE EFFECT OF KNO3 ON NaCl STRESS IN NITROGEN FIXATION OF BLUE-GREEN ALGAE ANABAENA 7120 EFFECT OF ECOLOGICAL CONDITIONS ON NODULATION NITROGEN FIXATION OF ACACIA MANGIUM Absorption and utilization of different nitrogen forms for sweet potato Effect of different N application rates on yield, qualities and N uptake of ginger