豫西旱作麦区小麦籽粒灌浆特性研究

为明确豫西旱作麦区小麦籽粒灌浆特性,给小麦粒质量的提高提供理论支撑。选用黄淮麦区具有代表性的济麦20、豫麦49-198、郑麦004、郑麦9023、偃展4110和豫麦50为试验材料,用Logistic方程拟合籽粒灌浆进程,通过F检验以及相关分析等方法,对籽粒灌浆参数进行了分析。结果表明,方程拟合系数R值在0.991 0～0.998 3,经F检验均达极显著水平,说明Logistic方程真实反映了小麦籽粒灌浆进程;籽粒最大灌浆速率(Vmax)、籽粒平均灌浆速率(Va)、快增期灌浆速率(V2)、缓增期灌浆速率(V3)与千粒重均呈显著性正相关,相关系数分别为0.67、0.73、0.69和0.73,灌浆持续时间通过灌浆速率间接影响粒质量的增加。

Studies on Wheat Grain Filling Characteristics in Dryland Wheat Production Area of Western Henan Province

Under the field conditions of dryland wheat producing area in western Henan province,six wheat cultivars from Huang-huai Wheat Producing Area(Jimai20,Yumai49-198,Zhengmai 004,Zhengmai 9023,Yanzhan 4110 and Yumai 50) were selected to study the grain filling parameters by using the logistic equation,F test and correlation analysis for 3 years.The results showed that the R value of equation fitting coefficient was between 0.991 0 and 0.998 3,reaching a highly significant level by F test.This indicated that the logistic equation could truly reflect the process of wheat grain filling.The maximum grain filling rate Vmax,the average grain filling rate Va,the grain filling rate during fast growth stage V2 and the grain filling rate during slow growth period V3 all had a significant positive correlation with 1 000-kernel weight,the correlation coefficient being 0.67,0.73,0.69 and 0.73,respectively.The duration of grain filling affected indirectly the increase of grain weight through the grain filling rate of wheat.