低供氮处理对杂交稻产量性状及产量的影响

目的]研究低供氮处理对杂交稻产量性状及产量形成的影响。方法]通过田间试验,对供试的20个杂交稻品种产量性状及产量在低供氮处理下进行相关分析和通径分析。结果]有效穗数与实粒数、着粒数与结实率均呈极显著负相关关系,实粒数与着粒数呈极显著正相关关系,各产量性状对产量的贡献大小表现为实粒数有效穗数千粒重着粒数结实率。结论]以有效穗数、实粒数为主攻对象可提高杂交稻的理论产量,为水稻栽培技术提供理论依据。

Effects of Low Nitrogen Treatment on the Hybrid Rice Yield and Yield Traits

Objective] To research the effects of low nitrogen treatment on the hybrid rice yield and yield traits. Method] Correlation analy-sis and path analysis of 20 varieties of hybrid rice yield traits and yields were carried out under the low nitrogen treatment by field experiment. Result] Effective panicle number had extremely significant negative correlation with solid grain number per panicle, grains per panicle and seed setting rate. Solid grain number per panicle had extremely significant positive correlation with grains per panicle. The order of contribu-tion size for yield in yield traits was solid grain number per panicle > effective panicle number > 1 000-grain weigh > grains per panicle >seed setting rate. Conclusion] Effective panicle number and solid grain number per panicle can improve the theoretical yield of hybrid rice, and provide theoretical references for the rice cultivation technology.