冀东冬小麦灌浆期与千粒重的试验研究

通过对195份冬小麦资源品种（系）的抽穗期、灌浆时间与千粒重的试验分析表明；冀东冬小麦的抽穗期主要在5月1－14日，而5月7－12日是抽穗的高峰期，达到总量的80．4％；灌浆时间在35－45d之间，以37－41d的品种最多，占品种总数的88．2％。随抽穗的推迟、灌浆期的缩短，千粒重呈显著下降趋势，相关系数分别为r=-0.4365和r=0.8924.

Study on the Grain Filling Period and 1000 Kernels Weight of Winter Wheat in East Area of Heber

The experiment for 195 winter wheat Cultivars (varieties)were studied on the relationship among heading stage, grain filling period and 1000 kernels weight. The results indicated that the majority of wheat cultivars (varieties)had hded between May the first and May 14th, and 80.4 percent of all headed from May 7th to 12th.The grain filllng period was 35~45 days,such kind of winter wheat cultivars (varieties) whose grain lasted filling period were between 37~41 days hads occupied to totaly.number of 88.2 percent. With the trenchancy of delayed heading stage, shorted filling period as well as decreased 1000 kernels weight significantly, its correlation index was r=-0.4365 and.r=0.8924 respectirely.