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5 秸秆还田后效对玉米植株15N利用率的影响

Table 5 Nitrogen use efficiency of maize under different straw return aftereffect (%)

处理 Treatment 氮肥利用率 N use efficiency 氮素残留率 N retention rate 氮素损失率 N loss 氮肥贡献率 N contribution rate CK 28.3±1.7 c 34.2±4.5 bc 37.5±5.4 ab 25.5±1.2 b D0 30.3±2.3 c 27.8±3.6 c 41.9±3.9 a 27.0±1.4 ab D0-20 34.3±1.0 b 33.6±3.6 bc 32.1±3.3 b 27.8±0. 6 ab D0-35 40.5±1.2 a 48.9±2.1 a 10.6±1.1 d 29.2±1.7 a D20-35 38.6±1.8 a 42.0±4.1 a 19.4±2.1 c 29.8±1.6 a D35 30.5±1.0 c 34.0±8.5 bc 35.4±4.3 ab 29.8±2.7 a D50 27.8±1.0 c 31.1±5.2 c 41.2±5.9 a 29.6±1.0 a