1·They also use less water and nitrogen.
此外，C4植物对水和氮气的需要量也较少。
2·The water and nitrogen applications are the two main factors that affect the nitrate leaching on farmland.
供水量和氮肥施用量是影响农田硝态氮淋失的主要因素。
3·Relationship between canopy reflectance characteristics and plant water status under different water and nitrogen levels was studied.
研究了不同土壤水氮条件下水稻冠层光谱反射特征与植株水分状况的量化关系。
4·The plants of a community use carbon dioxide, oxygen, water and nitrogen to build up their tissues usingenergy in the form of sunlight.
植物群落利用二氧化碳、氧气、水和氮生成能吸取阳光能量的组织。
5·The plants of a community use carbon dioxide, oxygen, water and nitrogen to build up their tissues using energy in the form of sunlight.
植物群落利用二氧化碳、氧气、水和氮生成能吸取阳光能量的组织。
6·The coupling effect of water and nitrogen on cotton yield and water use efficiency(WUE) was studied under different drip irrigation patterns.
研究施肥量和灌水量对不同滴灌模式棉花产量、水分利用效率（WUE）的水氮耦合效应影响。
7·Under treatments of different water and nitrogen applied level, the relationship between canopy water content and canopy temperature was studied.
研究了不同水肥处理下冬小麦冠层含水率与冠层温度的关系。
8·When the simulation model combined with GIS, it was easy to evaluate regional soil nitrogen behaviors under different treatments of water and nitrogen.
结果表明，通过模型计算与地理信息系统相结合，便于评价不同水氮管理、不同降雨年型条件下区域农田土壤水、氮素行为。
9·The effect of different rainfall years and different water and nitrogen management ways on winter wheat and summer maize was studied in northern part of north China Plain.
在华北平原北部研究了不同降水年型、不同水氮管理措施对冬小麦和夏玉米产量和氮素平衡的影响。
10·It is thus evident that the genetic models of nitrogen concentrations and nitrogen utilization efficiency of wheat in different water and nitrogen environments were different.
可见，小麦氮素含量和氮素利用效率的遗传模型在不同的水氮环境中不完全一样。