行距配置对大穗型小麦灌浆期干物质转移及籽粒灌浆特性的影响

在大田试验条件下,研究了不同行距配置对大穗型小麦品种兰考矮早八灌浆期干物质转运及灌浆特性的影响。结果表明,兰考矮早八干物质生产及物质转移效率受行距的影响。干物质生产以15 cm行距为最大,30 cm行距为最小;干物质转移量对籽粒的贡献率以穗轴 颖壳部位最低,以茎鞘为最大,叶片居中;地上部总干物质转移量对籽粒的贡献率以20 cm行距为最高,其次为15 cm行距,以30 cm行距为最低。通过Logistic方程拟合其籽粒灌浆过程并计算有关籽粒灌浆参数表明,行距配置对籽粒灌浆特征也有一定影响,就总的效果而言,以20 cm行距最优,有利于提高千粒重。

Effects of Row Spacing Form on Matter Transforming and Grain Filling Characteristics of Heavy-ear Wheat

Under field conditions,effects of different row spacings on matter transforming and grain filling characteristics were studied in Zhengzhou experimental farm of Henan province.The result indicated that row spacing could influence the dry matter production and transforming efficiency.The highest dry matter production came from the row spacing of 15 cm,and the lowest from 30 cm.Spike axis and husk had the lowest contribution rate to grain dry matter accumulation,stalk and sheath the highest,and leaves the middle.The highest total dry matter transforming amount to grain was from the row spacing 20 cm,and the lowest from 30 cm.Besides,grain filling course was imitated by logistic equation.In all,20 cm row spacing was benefitial to 1 000-grain weight.