The DPM method needs lot of field data, mainly to study nitrogen cycle in field, assess water and nitrogen usage efficiency and optimize management soil water and nitrogen fertilizer.
动力学模型需要大量的田间实测资料，主要应用于农田氮素循环、定量评价水氮资源利用率、优化水肥管理措施等方面。
Water and nitrogen fertilizer interaction coupling effects were analyzed. The reference for the region's water and nitrogen management and the estimate yields can be provided by all the work.
同时，根据试验资料，建立非充分灌溉和施肥条件下的水肥耦合函数，并分析其水肥耦合效应，为稻田水肥管理和预测产量提供参考。
Efficient genotypes and reasonable nitrogen fertilizer management are effective measures to increase nitrogen uptake and utilization efficiency in rice.
选用氮素高效基因型和合理的氮肥调控是目前提高水稻氮素利用效率的有效途径。
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