华北冬小麦开花期补灌的增产效应及其影响因素 |
张经廷,吕丽华,董志强,张丽华,姚艳荣,申海平,姚海坡,贾秀领 |
Yield-increasing effect of supplementary irrigation at winter wheat flowering and its influencing factors based on water and nitrogen coupling in north China |
Jing-Ting ZHANG,Li-Hua LYU,Zhi-Qiang DONG,Li-Hua ZHANG,Yan-Rong YAO,Hai-Ping SHEN,Hai-Po YAO,Xiu-Ling JIA |
图4 不同施氮水平耕层土壤有机质(a)与土壤全氮(b)含量逐年变化 |
Fig. 4 Changes in organic matter content (a) and total nitrogen content (b) in the topsoil with different nitrogen application levels |
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