Studying water-nitrogen coupling effect, each of the critical value of plant nitrate was 9816～9926 and 9783～9955, 8584～8932mg/kg under period of bud and flower, cone formation. The first top-dressing urea recommended of quantities was 20～63 kg/ hm~2.
在水氮耦合效应试验研究中确定了现蕾期、开花期、球果形成期植株硝酸盐的临界值分别为9816～9926、9783～9955、8584～8932mg/kg,推荐第一次追施尿素量20～63kg/ hm~2,第二次追施尿素量为22～55 kg/ hm~2。
参考来源 - 啤酒花施肥参数和水氮耦合模型的研究·2,447,543篇论文数据，部分数据来源于NoteExpress
Under field production conditions, the experiment was made to research the effect of water-nitrogen coupling on cotton development and yield under drip irrigation in 5 field spots.
通过在5个试验点田间试验研究水氮耦合对棉花生长和产量的影响。
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。
Coupling effects of water and fertilizers on translocation of nitrate nitrogen in protected land were studied with the design of quadratic orthogonal rotational combinations.
采用二次回归正交旋转组合设计，研究了水肥耦合效应对保护地土壤硝态氮运移的影响。
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