干旱胁迫下冬小麦灌浆特性分析

Analysis on the Grain Filling Characters of Winter Wheat under Dry Stress

在干旱胁迫条件下 ,以豫西地区种植的 6个主要小麦品种为试验材料 ,用Logistic方程对籽粒灌浆过程拟合 ,并推导出一系列次级参数 ,用相关与逐步回归等分析方法对不同灌浆参数与粒重关系进行分析。结果表明 ,干旱条件下籽粒灌浆速率对小麦粒重形成作用显著 ,而灌浆持续时间与粒重形成无显著相关关系 。

Under the dry stress,the grain filling processes of six main winter wheat varieties planted in the west of Henan province were modeled with Logistic equation and conducted a series of inferior parameters.The relationship between grain filling parameters and grain weights was analysed using correlation and stepwise regression.Results showed that grain filling rate significantly affected grain weight,but grain filling duration didn't relate to the grain weight significantly. It was very important to increase grain weight by increasing grain weight filling rate in gradual increasing period and quick increasing period.