不同播期处理冬大麦子粒增重特征分析

Characteristics of Grain Weight Gain of Winter Barley in Different Sowing Stages

在大田条件下,以扬饲麦3号、港啤号、扬农啤2号和Frankin 4个品种为供试材料,研究了不同播期大麦子粒增重动态和特征。结果表明:大麦子粒增重动态可以用Richards方程W=A/(1+be-kt)m来描述;逐步回归分析方程各特征参数与产量的关系表明,影响大麦产量形成的主要因素是最大积累速率,其次是起始积累势,最大积累速率越高,起始积累势越小,越有利于子粒灌浆。同时渐增阶段的积累速率和快增阶段的积累量对大麦子粒灌浆有较大影响。

Four winter barley cuhivars, yangsimai 3, gangpi, yangnongpi 2 and Frankin, were used to study the dynamics and characteristics of grain weight gain in various sowing stages. The results showed that the dynamics of grain weight gain in winter barley could be described by Richards equation. Through stepwise regression analysis, it was found that the parameters of the Richards equation for grain weight gain dynamics were positively related to the yield of winter barley. The parameters of the maximum accu- mulative rate and relative accumulative rate could affect the yield of winter barley, and high maximum accumulative rate and low relative accumulative rate contributed to the yield. Meanwhile, the average accumulative rate during early stages and accumulative amount during middle stages could also affect the yield of winter barley