侧深施氮对机插水稻产量形成及氮素利用的影响
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朱从桦,张玉屏,向镜,张义凯,武辉,王亚梁,朱德峰,陈惠哲
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Effects of Side Deep Fertilization on Yield Formation and Nitrogen Utilization of Mechanized Transplanting Rice
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CongHua ZHU,YuPing ZHANG,Jing XIANG,YiKai ZHANG,Hui WU,YaLiang WANG,DeFeng ZHU,HuiZhe CHEN
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表6 机械侧深施氮对水稻氮素利用的影响
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Table 6 Effects of mechanized side deep placement of nitrogen fertilizer on nitrogen utilization efficiency of rice
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年份
Year | 处理
Treatment | 氮素干物质生产率
N dry matter production efficiency (kg·kg-1) | 氮素稻谷生产率
N grain production efficiency (kg·kg-1) | 氮肥吸收利用率
N recovery efficiency (%) | 氮肥农学效率
N agronomic use efficiency (kg·kg-1) | | 2017 | N0 | 135.69a | 71.64a | — | — | | CUB | 109.97b | 58.17b | 25.50d | 8.05c | | CUM | 104.21c | 54.31c | 36.50c | 11.06b | | CRUB | 94.11d | 50.47d | 41.53b | 10.25b | | CRUM | 93.76d | 48.67d | 48.97a | 12.26a | | 2018 | N0 | 95.07a | 69.61a | — | — | | CUB | 80.15b | 58.05b | 31.22c | 11.62b | | CUM | 73.08bc | 52.67c | 48.11b | 15.70a | | CRUB | 71.92cd | 54.46bc | 41.28b | 13.93ab | | CRUM | 64.89d | 46.85d | 63.49a | 16.87a |
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