优化氮素与品种匹配可协同提高盐碱地夏玉米产量和氮肥利用率

高英波,张慧,刘开昌,张华斌,李源方,付希强,薛艳芳,钱欣,代红翠,李宗新

The Coordination of Nitrogen Optimization with Matched Variety Could Enhance Maize Grain Yield and Nitrogen Use Efficiency of Summer Maize in Saline Land

GAO YingBo,ZHANG Hui,LIU KaiChang,ZHANG HuaBin,LI YuanFang,FU XiQiang,XUE YanFang,QIAN Xin,DAI HongCui,LI ZongXin

表3 施氮水平对不同耐盐型夏玉米氮素利用效率的影响

Table 3 Effects of nitrogen levels on nitrogen use efficiency of different salt-tolerant summer maize

年份 Year 品种 Variety 处理 Treatment 氮肥偏生产力 NPFP (kg·hm-2) 氮肥农学利用效率 NAE (kg·kg-1) 氮肥利用率 NUE (%) 土壤氮依存率 SNDR (%) 2016 DH605 N1 41.05a 10.03a 31.75a 71.91c N2 21.22d 5.71c 17.49de 69.91c LD818 N1 38.27ab 8.80ab 28.76b 70.00c N2 19.29d 4.55c 16.92e 66.49d LD981 N1 36.11bc 7.10bc 25.07c 76.15b N2 19.68d 5.17c 15.52ef 72.01c LS188 N1 30.86c 7.41bc 20.42d 80.52a N2 18.52d 6.79bc 13.55f 75.75b 2018 DH605 N1 26.14a 5.32bc 28.96a 64.63c N2 13.37c 2.96e 17.46c 60.25e LD818 N1 25.39a 4.90c 23.50b 70.36b N2 13.11c 2.86e 15.21d 64.70c LD981 N1 23.66b 6.26a 19.53c 71.41b N2 12.92c 4.21d 14.82d 62.21d LS188 N1 22.93b 5.78ab 17.83c 73.92a N2 12.78c 4.21d 15.03d 62.74d