1.
Simulation of Soil Nitrogen Balance and Development of SISNDB Information System;
农田土壤氮素平衡动态模拟模型研制与SISNDB信息系统开发
2.
Soil Nitrogen Balance Simulation and Potential Enviromental Risk Assessment in Farmland Ecosystem at County Scale
县域农田生态系统土壤氮素平衡模拟及其潜在环境风险评价
3.
Relationship between soil nitrate,nitrogen balance and utilization in rainfed land
旱地土壤硝态氮与氮素平衡、氮肥利用的关系
4.
Study on Time and Spatial Change of Nitrate Nitrogen of Cotton and Apparent Budget of Soil Nitrogen;
棉田土壤硝态氮实时变化规律及氮素平衡初步研究
5.
Effect of Water Saving and Nitrogen Controlling on Nitrogrn Balance and No_3~--N Leaching of Different Soil-Vegetable Systems Ningxia;
节水控氮对宁夏不同土壤—蔬菜体系中氮素平衡及NO_3~--N淋失的影响
6.
Effects of nitrogen fertilization and irrigation rate on grain yield,nitrate accumulation and nitrogen balance on sandy farmland in the marginal oasis in the middle of Heihe River basin
水氮配合对绿洲沙地农田玉米产量、土壤硝态氮和氮平衡的影响
7.
Effect of Different Nitrogen Rates on Nitrogen Utilization and Residual Soil Nitrate of Spring Maize
不同施氮水平对春玉米氮素利用及土壤硝态氮残留的影响
8.
Effects of nitrogen rate on nitrogen uptake and utilization of winter wheat and residual nitrate in soil under straw mulch
秸秆覆盖条件下不同施氮水平冬小麦氮素吸收及土壤硝态氮残留
9.
The Research of Soil Carbon Balance in Different Land Use Systems;
不同土地利用方式对土壤碳素平衡影响的研究
10.
Horizontal Distribution Characteristics of Soil Nitrogen in Jujube-crop Intercropping Ecosystem
枣粮间作生态系统土壤氮素水平分布特性研究
11.
Study on Nitrogen Transformation of Various Fertilities Soil in Greenhouse
不同肥力水平大棚土壤氮素转化的研究
12.
As most of the yield increase resulted from the imbalanced use of nitrogen, native soil P and K reserves were depleted.
不平衡施用氮肥带来的产量增加，使土壤中贮存的P、K被逐渐耗竭。
13.
Greenhouse Gases Emission from Soil and Carbon-nitrogen Budget in the Northern China Plain with High Productivity;
华北高产粮区土壤温室气体排放及碳氮平衡研究
14.
Studies on Potassium Equilibrium in Tea-Grown Soils and Yields and Qualities of Tea;
茶园土壤钾素平衡与茶叶产量品质的研究
15.
recovery of soil-equilibrated potassium
恢复土壤全部的平衡
16.
Study on the Paddy Nitrogen Balance under Different N and Water Coupling in Typical Red Soil Areas;
典型红壤地区不同水肥组合下稻田氮素平衡的研究
17.
Effect of Different Integrate Agronomic Measures on Nitrogen Balance and Loss of Red Soil on Sloping Farmland in Yunnan
不同农艺措施组合对云南红壤坡耕地氮素平衡和流失的影响
18.
Spatial-temporal Variation and Influential Factors of Soil Nitrogen in Chengdu Plain;
成都平原土壤氮素的时空变异及其影响因素研究