The Dynamics of Soil Nh4+-N and NO3--N in a Pine Forest of Dinghushan, as Assessed by Ion Exchange Resin Bag Method Effects of elevated temperature and CO2 concentration doubling on soil total soluble nitrogen in subalpine coniferous forest of western Sichuan, China Chemical characteristics of PM2.5 in Beijing Changes in soil nitrogen characteristics during grassland desertification in Northwest Sichuan Relationship of NO3--N,NO2--N accumulation in some crop seeds with N fertilizers application Relationship between soil denitrifying enzyme activities and N2O emission Effects of Cultivation Management Modes of the High-yield and Super-high-yield on Nitrogen Uptake and Distribution in Wheat and Accumulation of Soil NO3-N EFFECT OF NITROGEN RATES ON NO3--N ACCUMULATION AND NITROGEN USE EFFICIENCY UNDER MAIZE AND WHEAT INTERCROPPED SYSTEM Response of root growth of rice genotypes with different N use efficiency to enhanced nitrate nutrition Effects of combined application of organic manure and chemical fertilizers on soil nitrogen availability and movement under water and fertilizer saving management in cucumbertomato double cropping system Nitrate nitrogen contents and quality of greenhouse soil applied with different N rates under drip irrigation Effects of urease and nitrification inhibitors on alleviating the oxidation and leaching of soil urea‘s hydrolyzed product ammonium RELATIONSHIP BETWEEN NITRATE REDUCTASE ACTIVITY AND YIELD CHARACTER OF HYBRID RICE DURING GROWTH AND DEVELOPMENT Influence of Different Concentrations of NO-3 and NH+4 on the Activity of Glutamine Synthetase and Other Relevant Enzymes of Nitrogen Metabolism in Wheat Roots Effects of Exogenous Spd on NO3--N,NH4+-N Contents and Nitrate Reductase Activity of Salt Stressed Leaves and Roots of Cucumber Seedlings Kinetics characteristics of NO3- absorption of barley (Hordeum vulgare L.) pretreated with different concentrations of NaCl and NO3-N Absorption and Distribution of PM2.5 NH4+ and NO3- in Populus euramericana Neva. Effects of Rhizosphere Nitrate and Ammonium on the Level of Cytokininsand Leaf Growth of Malus hupenensis Rehd. Effects of Rhizosphere Nitrate and Ammonium on the Level of Cytokininsand Leaf Growth of Malus hupenensis Rehd. Characteristics of nitrous oxide (N2O) emission from a headstream in the upper Taihu Lake Basin The Differences of Subcellular Ca2+ Distribution in Root Meristem Region ofCucumber Seedling Under Different NO3- Concentrations Stress Vertical distribution characteristics of N2O emission in tea garden and its adjacent woodland. Effects of NO3- stress on photosynthetic characteristics and nitrogen metabolism of strawberry seedlings. Effects of NO3- stress on cucumber seedling growth and magnesium absorbing under suboptimal temperature. Characteristics of ammonium N and nitrate N accumulation in dryland soil in relation with wheat yield. Physical and chemical properties of stemflow in different forest types of a secondary forest ecosystem in montane regions of eastern Liaoning Province, China Effects of delayed irrigation at jointing stage on nitrogen accumulation and its allocation, and NO3-N migration in wheat Acidity and Inorganic Nitrogen Concentrations in Soil Solution in Short-term Response to N Addition in Subtropical Forests Effects of NH4+-N/ NO3--N ratios on kinetics of nitrate uptake by two typical lettuce genotypes in hydroponics Influence of NO3-∶ NH4+ ratio on growth and chlorophyll content in pakchoi Effects of nitrate uptake on the changes of plasma membrane potential of rice roots Effects of medium pH and N forms on aerenchyma formation in roots of different rice genotypes Nitrogen cycling and balance in agricultural ecosystem in piedmont plain of Taihang Mountains Genotypic difference of maize lateral roots in response to local nitrate supply Effects of tillage practices on nitrogen accumulation and translocation in winter wheat and NO3--N content in soil Bioinformatics Analysis and Prokaryotic Expression of MAPK in Cucumber Integrated nitrogen management in greenhouse tomato production Effect of controlled-release urea combined application with urea on nitrogen utilization efficiency of winter wheat Study on the effect of different fertilizer-soil ratios on NO3--N concentration Effect of fertilization on distribution of nitrate in cucumber and soil in sunlight greenhouse Study on nitrogen movement under localized compaction and ridge tillage by use of artificial rainfall Study on the nitrate reduction characteristic of vegetables A long-term experiment on effect of organic manure and chemical fertilizer on distribution,accumulation and movement of NO3-N in soil Influence of Elevated CO2 Concentration and Nitrogen Source on Photosynthetic Traits in the Invasive Species Eupatorium adenophorum (Asteraceae) Influence of different NH4+/NO3- ratios on nitrogen metabolism of cotton Concentration change and migration characteristics of nitrogen in the paddy field of Ningxia Yellow River Irrigation Area Yield and nutrient balance of lettuce as influenced by reduced and optimized nitrogen application Effects of NH4+-N/NO3--N ratio on pak-choi nitrogen metabolism and enzyme activity under weak-light Use efficiency and fate of applied nitrogen in long-term tomato districts of Taiyuan Effects of DCD addition on grain yield, N2O emission and residual nitrate-N of spring maize in rain-fed agriculture Effect of dripper fertigation on tomato yield and apparent N balance in a greenhouse Study on the relationship between irrigation amount and NO3--N leaching of tomato field in greenhouse Effects of water condition and nitrogen level on soil dissolved nitrogen compounds Effect of postponing N application on soil N supply, plant N uptake and utilization in winter wheat Nitrate induction triggers different transcriptional changes in a high and a low nitrogen use efficiency maize inbred line Effects of nitrogen addition on species richness and relationship between species richness and aboveground productivity of alpine meadow of the Qinghai-Tibetan Plateau, China Temporal and spatial variations of soil NO3--N in Orychophragmus violaceus/spring maize rotation system in North China. Effects of different nitrogen forms and their ratios on broccoli yield, quality, and nutrient absorption. N and P accumulation status and their leaching potential in vegetable fields in Fujian Province Effects of different nitrogen forms on nutrient uptake, yield formation and quality of cabbage Effects of simulated nitrogen deposition on soil available nitrogen forms and their contents in typical temperate forest stands. Effects of coated controlled release urea combined with conventional urea on winter wheat growth and soil NO3--N. Effects of exogenous NO3- on cherry root function and enzyme activities related to nitrogen metabolism under hypoxia stress. Effects of exogenous NO on the growth and antioxidant enzyme activities of cucumber seedlings under NO3- stress. Physical and chemical properties of throughfall in main forest types of secondary forest ecosystem in montane regions of eastern Liaoning Province, China. Relationship between accumulated NO3-N in soil profiles and apparent nitrogen budget in winter wheat fields under nitrogen fertilization Effects of different nitrogen levels and NH4+/NO3- ratios on the growth, nitrogen metabolism and photosynthesis of anther-derived somatic seedlings of Hevea brasiliensis Study on the Methods of Sample Collection and Keeping in Forest Soil NO3-N Determination Dynamics of different soil nitrogen pools after appIying different types of nitrogen fertilizers Leaching loss of nitrate during the wheat growing season in Piedmont of Mountain Taihang Long-term Partitioning of Ammonium and Nitrate Among Different Components in an Alpine Meadow Ecosystem Effects of Nitrate on the Growth of Lateral Root and Nitrogen Absorption in Rice Effects of nitrogen application and intercropping on spatio-temporal distribution of soil inorganic nitrogen in pea/maize intercropping field Characteristics of vegetation and soil inorganic nitrogen concentrations under different disturbed habitats in a weak alpine ecosystem THE EFFECTS OF TEMPERATURE ON THE NUTRIENT CONCENTRATIONS IN SOIL SOLUTION COMPARISON OF NH_4~+-N AND NO_3~--N NUTRITION IN HYBRID AND CONVENTIONAL RICE AT THE LATE GROWTH STAGE Distribution and fate of nitrogen fertilizer in various soil nitrogen pool at wheat seedling stage Effect of different structure of fertilizer on the migration of nitrogen in red rice soil Effect of phosphate application on soil nitrate nitrogen accumulation STUDY ON EFFECT OF IRRIGATION ON SOIL NITRATE LEACHING AND UPTAKE