杂交小麦产量构成因素分析

Analysis of Yield Components of Hybrid Wheat

通过分析全国及河北省不同地区杂交小麦单位面积产量和产量构成因素的关系,表明在杂交小麦单位面积产量的构成因素中,千粒重对产量的贡献最大,贡献率为45.15%,单位面积穗数次之,穗粒数对单位面积产量的贡献最小.栽培管理中,在保证基本苗的基础上,适当促进冬前分蘖,合理促进拔节期生长,保证灌浆期的肥水供应,就能达到高产.

The relationship of the yield components (such as grains per spike,1?000-kernel weight,spike per centiare) and the yield per centiare was analysed in Hebei province and other districts of China.The result illustrated that the most contribution to the yield (about 39.88%)came from the 1?000-kernal weight,the spike per centiare was the second,the least was grains per spike.So the improvement of the 1?000-kernal weight and spike numbers per centiare is the key way to promote the yield.