Fore water resources, the key problem of China is the efficiency of water usage.
中国水资源问题的核心是利用效率问题。
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。
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