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- On the condition of winter wheat-summer corn cropping system in Beijing, the nonlinear goals programming model was used to optimize the water and nitrogen management under various rainfall year types. 摘要本文应用了非线性目标规划模型，用线性化逼近法求解，对冬小麦-夏玉米种植制度下，不同降雨年型的水氮管理措施进行了优化。
- water and nitrogen management model (WNMM) 水氮管理模型
- water and nitrogen managements 水氮
- Optimization of Water and Nitrogen Management for High-Yield-Cotton in South Xinjiang 南疆高产棉田水氮优化管理研究
- The coupling effect of water and nitrogen (N) of cotton under plastic mulching by drip irrigation was studied in Southern Xinjiang. 摘要 在南疆气候条件下，研究了膜下滴灌棉花水氮耦合效应。
- Chemical analysis, however, revealed that foliar water and nitrogen contents were similar between these two host plant species. 总之，本研究发现所用的两个水青蛾族群仅以枫香为食，是否所有族群或整个物种均是如此，还需采集及验证其他族群才可证明。
- Laboratory experiments were conducted to study the effects of fertigation strategies on water and nitrogen distribution from a surface point source of ammonium nitrate. 以一种砂粒含量高达95%25的砂土为对象,开展了滴灌施肥灌溉条件下,灌水器流量、灌水量和系统运行方式对水分、硝态氮和铵态氮分布影响的室内试验。
- To evaluate the effects of foliage quality on insect feeding performance, leaf tissues from all plant species were collected and assayed for water and nitrogen contents. 结果显示夹竹桃天蛾在这三种夹竹桃科植物上的取食表现显著的不一样，食用软枝黄蝉树叶的幼虫全部死亡；
- Field experiment was conducted to study the effect of water and nitrogen on yield and nitrate content of amaranth (Amaranthus tricolour) and spinach (Spinacia oleracea) and their water use efficiency. 通过田间试验研究不同水氮管理对苋菜和菠菜的产量、水分利用效率及硝酸盐含量的影响。
- In the condition of slight stress of soil water and nitrogen, the LrD in the subsoil is increased, but the senescence rate of the root is higher during the final growth stage of crops. 在水分稍有亏缺条件下，土层中部根长密度增加，但后期衰亡速率也较快。
- All plants need water and light. 所有的植物都需要水和阳光。
- Salt water and absence wash away love. [谚]远航久别恩情疏。
- Iron reacts with water and air to produce rust. 铁与水和空气起化学反应而生锈。
- Seeds need water and warmth to germinate. 种子发芽需要水和温度。
- What are the purposes of helium and nitrogen gas? 氦气与氮气在这套系统中有何作用？
- Fill a glass with water and dissolve this tablet in it. 倒杯水把药片放进去溶解了。
- If you go near the water and tumble in, I shall punish you. 你要是靠近水边掉到水里，我要惩罚你的。
- coupling effect of water and nitrogen 水氮耦合
- soil water and nitrogen dynamics 土壤水氮运移
- interaction effect of water and nitrogen 水氮耦合效应
