华北地区夏玉米滴灌施肥的肥料效应

李格,白由路,杨俐苹,卢艳丽,王磊,张静静,张银杰

Effect of Drip Fertigation on Summer Maize in North China

LI Ge,BAI YouLu,YANG LiPing,LU YanLi,WANG Lei,ZHANG JingJing,ZHANG YinJie

表4 夏玉米氮肥利用率

Table 4 Nitrogen fertilizer use efficiency of summer maize

年份Year 处理Treatment 氮肥利用率NFUE (%) 氮肥农学效率NAE(kg·kg-1) 氮肥偏生产力NPFP (kg·kg-1) 2017 N0 - - - N1 68.66a 2.98b 75.44a N2 55.37b 7.45a 65.42b N3 37.60c 5.34a 53.65c 2018 N0 - - - N1 48.23a 7.86ab 64.89a N2 47.05a 8.71a 54.34b N3 29.18b 6.55b 44.57c