播种时期对春小麦籽粒增重过程和蛋白质含量变化的影响

以阿勃等四个春小麦品种（品系）为材料，分析了播种时期对西宁地区春小麦粒重及蛋白质含量的影响，结果表明，播种时期对春小麦籽粒增重过程和籽粒发育过程中蛋白质含量的变化规律没有显著影响。晚播使籽粒蛋白质含量增加，西宁地区播期晚至４月１５日粒重也有增加趋势，但随着播期推迟，春小麦单位面积穗数和每穗粒数明显减少，籽粒产量和蛋白质产量随之下降。

The Influences of the Sowing Times on theIncreasing Process of Weight and the Change ofProtein content of the Grain of Spring Wheat

The influences of the sowing times on the weights and the protein content of the grains of the three varieties and one Line of spring wheat planted in Xining area have been analysed . The result showed that the sowing time has not marked influences on the increasing process of grain weight and the changing trend of the protein content in the growing process of the grain. The late sowing time increases the protein content of the grain. The grain weight shows an increasing tendency when the sowing time is postponed till the time of April. 15. With the further delay of sowing time, because the ear number per unit area and the grain number per ear decrease obviously, both the grain yield and the protein yield per unit area are lessened too.