不同施氮水平对青贮玉米植株氮素积累和转运的影响

王丽萍, 白岚方, 王天昊, 王宵璇, 白云鹤, 王玉芬

Effects of Different Nitrogen Levels on Nitrogen Accumulation and Transport in Silage Maize

Wang Liping, Bai Lanfang, Wang Tianhao, Wang Xiaoxuan, Bai Yunhe, Wang Yufen

表5 不同氮素水平下植株产量及氮素利用率

Table 5 Plant yield and nitrogen utilization efficiency under different nitrogen levels

年份Year 处理 Treatment 产量 Yield (t/hm2) 氮肥农学利用率 Nitrogen agronomic efficiency (%) 氮肥偏生产力 Nitrogen partial factor productivity (%) 氮肥吸收效率 Nitrogen absorption efficiency (%) 2018 N0 20.18b － － － N8 31.46a 94.00a 262.13a 2.69a N12 28.18a 44.46b 156.54b 1.85b N16 30.65a 43.65b 127.70c 1.57c N20 31.51a 37.77b 105.02d 1.30d N24 29.96a 27.17b 83.22e 0.99e F 16.89 12.69 137.33 152.35 P ** ** ** ** 2019 N0 21.31b － － － N8 25.55a 35.32a 212.88a 2.15a N12 24.47ab 17.58a 135.95b 1.51b N16 27.09a 24.08a 112.86c 1.19c N20 25.71a 14.66a 85.69d 0.89d N24 24.69ab 9.39a 68.58d 0.80d F 2.35 1.69 65.61 43.12 P * ns ** **