秸秆还田后效对玉米氮肥利用率的影响

邹文秀,韩晓增,陆欣春,陈旭,郝翔翔,严君

Effect of Maize Straw Return Aftereffect on Nitrogen Use Efficiency of Maize

ZOU WenXiu,HAN XiaoZeng,LU XinChun,CHEN Xu,HAO XiangXiang,YAN Jun

表6 玉米氮肥利用率与土壤理化性质的相关性分析

Table 6 The relationship between N use efficiency and selected soil properties

项目 Items 根重 Root biomass 轻组有机碳 Light fraction organic carbon >0.25 mm团聚体 >0.25 mm aggregate 容重 Bulk density 饱和含水量 Saturated water capacity 田间持水量 Field water capacity 氮肥利用率 N use efficiency 0.72** 0.98** 0.99** -0.85** 0.96** 0.97** 氮肥贡献率 N contribution rate 0.41* 0.75* 0.77** -0.70** 0.74** 0.76**