夏玉米不同部位干物质临界氮浓度稀释曲线的构建及对产量的估计

苏文楠, 解君, 韩娟, 刘铁宁, 韩清芳

Construction of critical nitrogen dilution curve based on dry matter in diffe rent organs of summer maize and estimation of grain yield

SU Wen-Nan, XIE Jun, HAN Juan, LIU Tie-Ning, HAN Qing-Fang

表2 2014-2017年正大12和陕单609的氮效率

Table 2 Nitrogen use efficiencies of ZD and SD from 2014 to 2017

施氮量 Nitrogen rate 品种 Cultivar 氮肥偏生产力 Partial factor productivity nitrogen (PFPN, kg kg-1) 氮肥回收效率 Recovery efficiency of nitrogen (REN, %) 氮素利用效率 Nitrogen utilization efficiency (NutE, kg kg-1) 氮素吸收效率 Nitrogen uptake efficiency (NupE, kg kg-1) 2014 2015 2016 2017 2014 2015 2016 2017 2014 2015 2016 2017 2014 2015 2016 2017 N0 ZD 79.1 a 78.4 a 71.0 a 72.6 a 69.5 a 76.6 a 79.9 a 98.0 a SD 73.0 b 69.9 b 61.2 b 63.3 b 62.1 b 64.6 b 66.8 b 76.9 b N150 ZD 62.7 a 67.9 a 64.9 a 70.1 a 36.2 a 44.9 a 45.3 a 39.5 a 60.9 a 59.0 a 51.4 a 57.6 a 35.6 a 36.9 a 37.3 a 40.4 a SD 54.3 b 55.4 b 56.9 b 58.3 b 29.8 b 36.6 b 34.4 b 39.3 a 57.6 b 52.7 b 49.2 b 49.1 b 30.8 b 30.1 b 31.7 b 32.0 b N225 ZD 46.7 a 49.2 a 50.8 a 50.8 a 40.7 a 43.5 a 38.0 a 39.3 a 54.9 a 54.5 a 54.9 a 53.9 a 30.7 a 30.3 a 30.5 a 24.3 a SD 39.7 b 40.8 b 43.5 b 44.3 b 38.1 b 36.9 b 34.4 b 37.7 a 48.9 b 49.5 b 49.0 b 48.9 b 26.1 b 25.2 b 25.7 b 20.7 b N300 ZD 34.0 a 35.7 a 37.6 a 36.7 a 35.4 a 35.9 a 37.0 a 32.6 a 49.4 a 50.2 a 48.2 a 49.8 a 24.4 a 23.7 a 24.5 a 18.4 a SD 30.3 b 30.8 b 32.4 b 32.8 b 34.7 a 34.2 a 32.6 b 34.2 a 45.3 a 45.1 b 44.2 b 44.3 b 21.8 b 20.5 b 20.8 b 15.6 b 方差分析 品种Cultivar (C) ** ** ** ** ** ** ** ns ** ** ** ** ** ** ** ** ANOVA 氮肥Nitrogen rate (N) ** ** ** ** ** ** ns ns ** ** ** ** ** ** ** ** 品种×氮肥C×N ** ** ns ** ns ** ns ns * ** ns ** ns ** ** **