华北平原五省冬小麦产量和氮素管理的时空变异
任思洋,张青松,李婷玉,张福锁(
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Spatiotemporal Variation of Winter Wheat Yield and Nitrogen Management in Five Provinces of North China Plain
SiYang REN,QingSong ZHANG,TingYu LI,FuSuo ZHANG()
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图5. 2005-2014年华北冬小麦分县施氮量及氮素利用效率和氮盈余的空间变异
Fig. 5. Spatial variation of nitrogen application, nitrogen use efficiency and nitrogen surplus of winter wheat in North China Plain from 2005 to 2014
