抽穗至成熟期气温对弱春性小麦千粒重和不孕小穗率的影响

The Effect of Air Temperature on Thousand-Grain Weight and the Rate of Sterile Spikelet of Weak Springness Wheat from Heading to Ripening

弱春性小麦品种的千粒重和不孕小穗率呈极显著的负相关.抽穗至成熟期间的适温范围是21～26℃.千粒重与抽穗至成熟天数呈极显著的正相关.在抽穗至成熟期间,千粒重与平均日均温呈负相关,与平均日最高温度呈极显著的负相关,而与平均昼夜温差呈极显著的正相关.

The thousand-grain weight and the rate of sterile spikelet for varieties of weak springness wheat shewed very notable negative correlation. The scope of optimum temperature during heading-ripening was 21-26℃. The thousand-grain weight and the days from heading to ripening showed very notable positive correlation. From heading to ripening, the thousand-grain weight and the mean of average day temperature showed negative correlation, and the average of day highest temperature showed very notable negative correlation, but with the average temperature differences between days and nights showed very notable positive correlation.