不同类型水稻品种的产量构成因素与产量的关系(英文)

目的]研究不同类型水稻品种产量构成因素与产量的关系,为水稻高产栽培提供理论依据。方法]以在四川成都地区应用较多的超级稻品种和非超级稻品种为试验材料,研究不同类型品种连续 3 年(2006~2008 年)在高产栽培条件下的产量表现,分析其产量构成因素与产量的关系。结果]水稻的产量与穗数、穗粒数、结实率、千粒重关系密切,对于不同的品种类型,4个因素对产量的影响存在差异。在10.5~11.25 t/hm2的产量目标下,通过中小苗三角形条栽模式研究结果显示超级稻的产量与穗数、千粒重关系密切,同时,与穗粒数呈负相关,与结实率呈显著负相关。非超级稻品种的产量与穗数、穗粒数、结实率、千粒重均呈负相关关系,且与穗数、千粒重呈显著负相关。结论]该研究明确了不同类型水稻品种的产量构成因素与产量的关系,为合理制订高产栽培措施、充分发挥超级稻的产量潜力、实现水稻大面积稳产高产奠定了基础。

Relationship between Grain Yield and Yield Components of Various Rice Cultivars

Objective] The relationship between grain yield and yield components was investigated in different rice cultivars at the target yield of 10.5-11.25 t/hm2,to provide theoretical basis for cultivation of high-yield rice.Method] The yield performance of various super rice and non-super rice cultivars that were cultivated in large area in Sichuan Chengdu was studied under high-yielding cultivation conditions from 2006 to 2008.Result] The rice yield was closely correlated with the productive panicle number,grain number per panicle,seed setting rate and 1 000-grain weight.The four yield components showed different influences on the yield of different rice cultivars.By adopting the high yielding cultivation technology(that the seedlings were planted in a triangle shape) at the target yield of 10.5-11.25 t/hm2,we found that the rice yield of super rice cultivars was closely correlated with productive panicle number and 1 000-grain weight,negatively correlated with grain number per panicle,and significantly negatively correlated with seed setting rate;the grain yield of non-super rice cultivars was negatively correlated with grain number per panicle and seed setting rate,and significantly negatively correlated with the productive panicle number and 1 000-grain weight.Conclusion] The results revealed the relationship between grain yield and yield components in different rice cultivars,which provided references for developing reasonable cultivation measures and thus to improve the yield of super rice in large acreage.