氮肥运筹对‘陆两优996’产量形成与氮利用效率的影响  

Effects of Nitrogen Fertilizer Planning Mode on Yield Formation and Nitrogen Utilization Efficiency of‘Luliangyou 996’

作　　者：陈平平[1] 张小平 吴小京 易镇邪[1] 屠乃美[1] 

机构地区：[1]湖南农业大学农学院,长沙4101281 [2]郴州市农业科学研究所,湖南郴州423042 [3]郴州市农作物种子储备和技术推广站,湖南郴州423000

出　　处：《中国农学通报》2011年第5期238-242,共5页Chinese Agricultural Science Bulletin

基　　金：湖南省重大科技专项(2006NK1001);湖南省自然科学基金项目(09JJ4008);湖南农业大学人才基金项目(06YJ29);湖南农业大学青年基金项目(08QN31);湖南省普通高校青年骨干教师培养计划项目

摘　　要：以‘陆两优996’为材料,研究了氮肥运筹方式对超级早稻产量形成与氮利用效率的影响,结果表明:氮肥运筹方式显著影响超级早稻源库特性与产量,与D2处理(6:2:1:1)相比,D3处理(4:2:3:1)穗分化期略有延长,穗粒数略有提高,成穗率、有效穗数与叶面积显著提高,茎鞘物质输出率显著下降,产量显著提高;氮肥运筹方式显著影响超级早稻氮利用效率,与D2处理相比,D3处理氮素累积量、氮肥利用率、氮素吸收效率、氮肥效率显著提高。可见,适当增大穗肥比例有利于改善超级早稻源库关系,有利于提高产量、氮肥利用率与氮利用效率。‘ Luliangyou 996 ’ was used as material to study the effects of nitrogen fertilizer planning modes （6：2： 1：1 and 4：2：3：1） on yield formation and nitrogen utilization efficiency of super early rice. The main results showed that effects of nitrogen fertilizer planning modes on yield and source and sink characteristics were sigificant. Compared to 6：2：1：1 treatment, ear-differentiation duration and grain number per panicle were increased slightly, and ear-bearing tiller rate, effective panicles, leaf area and yield were improved significantly, while output percent of stem and sheath store matter was decreased significantly in 4：2：3：1 treatment. Nitrogen utilization efficiency of super early rice was affected significantly by nitrogen fertilizer planning mode. Compared to 6：2：1：1 treatment, nitrogen accumulation, nitrogen use efficiency, nitrogen uptake efficiency and nitrogen fertilizer efficiency were improved significantly in 4：2：3：1 treatment. These results showed that appropriate increase of ear-fertilizer was advantageous to improve source-sink relationship and heighten yield, nitrogen use efficiency and nitrogen utilization efficiency of super early rice.

关 键 词：超级早稻 '陆两优996’ 氮肥运筹方式 产量形成 氮利用效率 

分 类 号：S365[农业科学—作物栽培与耕作技术]