施氮量对高粱产量、品质及氮利用效率的影响

曹晓燕, 武爱莲, 王劲松, 董二伟, 焦晓燕

Effects of Nitrogen Fertilization on Yield, Quality and Nitrogen Utilization Efficiency of Sorghum

Cao Xiaoyan, Wu Ailian, Wang Jinsong, Dong Erwei, Jiao Xiaoyan

表6 施氮量对氮利用的影响

Table 6 Effects of N fertilization on N utilization efficiency

处理 Treatment 氮利用效率 N utilization efficiency (%) 氮偏生产力 Partial productivity of N fertilizer (g/g) 氮生理利用效率 Physiological N use efficiency (g/g) N0 - 49.2±1.1c - N1 49.5±0.7a 70.0±0.8a 81.4±1.1a N2 45.8±1.4a 57.3±0.4b 59.7±0.5b N3 40.8±0.8b 39.6±2.1d 40.0±0.7c N4 24.6±0.9c 32.5±0.2e 30.1±0.3d N5 12.5±0.3d 27.4±0.8f 23.4±0.9e