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		作物水肥耦合类型量化方法在华北冬小麦水氮配置中的应用
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			A Novel Method for Quantitating Water and Fertilizer Coupling Types and Its Application in Optimizing Water and Nitrogen Combination in Winter Wheat in the North China Plain
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| 图2. 冬小麦递次施氮对灌水增产率及其年际变化特征的影响 | 
| Fig. 2. Effect of N-fertilizer increase homogeneity on yield increase ratio derived from added irrigation and its inter-annual variation in winter wheat | 
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