冬小麦分蘖死亡率与产量结构关系研究

冬小麦无效分蘖对产量的影响,是因为它减小了最佳有效群体.利用新乡市1983～2005年观测资料分析了在不同年际农业及气候条件下各产量结构和分蘖死亡率之间的相关关系,结果表明:基本苗、单株成穗数、最高密度、单位面积成穗率和分蘖死亡率之间相关显著;单位面积籽粒重、单位面积茎秆重、不孕小穗率、单穗粒数与分蘖死亡率之间相关系数相对偏小.

Relationships Between Tiller Mortality and Yield of Winter Wheat

Inefficient tillers of winter wheat affect grain yield because it reduces the optimum effective plant population. With the data collected from 1983 to 2005, we analyzed the correlations between them under different climates. The results showed that there were obvious correlations between basic seeding, grain yield per plant, maximum density, grain yield per unit area and tiller mortality. It also showed that there were less sure correlations between grain number per unit area, grain plant per unit area, inefficient spike number, grain number per spike and tiller mortality.