不同施氮水平对双季稻产量、氮素利用率及稻田氮素平衡的影响

秦碧蓉, 尤赛雅, 陈书融, 朱练峰, 孔亚丽, 朱春权, 田文昊, 张均华, 金千瑜, 曹小闯, 刘丽

Effects of the Different Nitrogen Levels on Yield, Nitrogen Utilization Efficiency and the Nitrogen Balance of Double-Cropping Rice in Paddy Field

Qin Birong, You Saiya, Chen Shurong, Zhu Lianfeng, Kong Yali, Zhu Chunquan, Tian Wenhao, Zhang Junhua, Jin Qianyu, Cao Xiaochuang, Liu Li

表3 双季稻氮素利用率和表观残留率

Table 3 Nitrogen use efficiency and nitrogen apparent residue rate of the double-cropping rice

处理Treatment NRE (%) NAE (kg/kg) NPFP (kg/kg) NPE (kg/kg) 氮表观残留率N residue rate (%) 早稻 Early rice N0 － － － － － N90 23.5±1.8c 13.6±0.2a 84.9±2.0a 29.3±0.8a 17.0±3.7d N120 26.2±1.4bc 10.7±0.2b 64.8±2.2b 26.2±0.2b 27.0±1.8c N150 28.3±1.0b 9.3±0.9c 52.6±2.5c 23.5±1.9bc 37.2±3.6ab N180 31.3±0.8ab 8.1±0.1d 42.3±3.7d 24.4±1.1c 42.2±1.8a N210 34.4±1.4a 7.4±0.4d 38.3±1.5e 21.0±1.0d 47.1±2.1a 晚稻 Late rice N0 － － － － － N120 32.8±1.9b 10.0±0.8a 60.0±2.5a 13.9±2.8c 26.0±2.1c N160 35.1±1.1ab 8.1±0.1b 43.7±6.5b 17.7±1.0b 29.1±1.4c N200 37.3±1.0a 7.5±0.2b 39.3±2.0b 19.7±1.2ab 39.0±1.9b N240 37.1±2.5a 6.0±0.1c 32.5±1.4c 19.2±1.5ab 43.8±1.6ab N280 37.1±2.3a 5.7±0.1c 28.4±1.4c 21.2±0.9a 47.8±1.3a