摘要
在大田条件下,研究了施氮量对不同类型水稻品种吸氮特性及氮肥利用率的影响。结果表明:随施氮量的增加,不同类型水稻品种的吸氮量、百千克籽粒需氮量均增加;产量随百千克籽粒需氮量的增加呈先增加后减少的趋势,产量在9000～10500kg·hm-2的百千克籽粒需氮量集中在1.9～2.2kg。在本试验条件下,镇稻88、武运粳7号、8优161、常优1号的氮肥利用率随施氮量的增加呈上升的趋势,而武育粳3号、8优父、扬稻6号、扬籼4号、两优培九、汕优63的氮肥利用率随施氮量的增加呈上升的趋势,至中肥处理达最大,高肥处理则显著下降;产量与氮肥利用率呈极显著的线性相关性,产量在9000～10500kg·hm-2的氮肥利用率都在40%左右。
The effects of N application rate on the characters of uptake nitrogen and nitrogen recovery of different rice varieties was studied under field conditions. The results showed that N uptake rate and the N requirement for 100 kg grain increased with the N application rate. The yield increased with N requirement for 100 kg grain at first, then descended. The N requirement for 100 kg grain was 1.9～2.2 kg at the yield level from 9 000 kg·hm-2 to 10 500 kg·hm-2. Under the experiment conditions, the nitrogen recovery increased with N application rate for the rice Zhen dao 88, Wuyun gen No.7, 8 you 161,Chang you No.1. The nitrogen recovery increased with N application rate at first, amounted to the greatest level at middle nitrogen level, then descended dramatically at high nitrogen level for the rice Wuyu gen No.3, 8 youfu, Yangdao No.6, Yangxian No.4, Liangyou peijiu, Shanyou 63. The linear relation was significant between yield and nitrogen recovery, the nitrogen recovery was almost 40 %at the yield level from 9 000 kg·hm-2 to 10 500 kg·hm-2.
出处
《上海交通大学学报（农业科学版）》
2003年第4期325-330,共6页
Journal of Shanghai Jiaotong University(Agricultural Science)
基金
国家"十五"重大攻关课题资助项目(ST2001-08)
关键词
水稻
品种
吸氮量
百千克籽粒需氮量
氮肥利用率
rice
different rice varieties
N-uptake amount
N-requirement for 100 kg grain
nitrogen recovery
