冬小麦粒重形成与生育中期气象条件关系的研究

本文通过１９７４～１９９２年对小麦粒重形成与生育中期（拔节至抽穗）气象条件关系的研究，认为小麦开花后不久其粒重在年际间已有明显差异；小麦生育中期气象条件是影响早期粒重的重要因素，其中温度是影响的主导因素。每天日照在６ｈ以上易形成早期高粒重；降雨分布在该阶段的两端，有利于形成早期高粒重，这与生产上重视拔节与孕穗水是一致的；在早期粒重高的年份，最终粒重常常也高，因此，在生产实践中，采取有效措施提高早期

The Relationship between the Grain Weight Formation and the Meteorological Conditions in the Middle Growth Period of Winter Wheat

The relationship between development process of grain weight and meteorological conditions in the middle growing period of winter wheat was studied from 1974 to 1992. The results showed that there was evident difference of grain weight shortly after wheat flowering in different years. Meteorological conditions in the middle growth period of wheat were important factors to affect the early grain weight, among which the crucial factors that affected grain weight was the temperature. Sunshine over 6 hours per day was favorable to form a high early grain weight. Rainfall at jointing and booting stage was beneficial to the formation of high grain weight in the early part of grain filling period, which coincided with the irrigation taken seriously at these two stage in wheat production. Therefore, it was very important to take effective measures to increase the early grain weight for gaining a high final grain weight.