空气温湿度对水稻灌浆及空壳率的影响研究

Study on Effects of Air Temperature and Relative Humidity Influence on Grain Filling and Percentage of Unfilled Grains in Rice

对1996—2005年10个年份的晚稻孕穗至成熟期的空气温度与相对湿度对水稻空壳率和灌浆影响进行了研究,结果表明:相对湿度对水稻的灌浆速度没有显著影响;灌浆期气温的升高对水稻灌浆速度的增加有显著影响;日最高温度大于或等于30℃的天数对水稻秕粒率的影响是不显著的;但孕穗期至抽穗开花期日最高温度大于或等于30℃的天数对水稻空壳率的影响是极显著的。最后对防御高温危害提出了建议。

Effects of air temperature and relative humidity influence on grain filling and percentage of unfilled grains with the late rice of 1996-2005 were studied in the paper. The result shows that air relative humidity has no distinct influence on grain filling. It is significant that higher temperature during stage of grain filling brings on higher velocity of graia filling. The days whose daily maximum of air temperature exceed 30℃ per-day have insignificant influence on blighted grain rate of rice. But the days whose daily maximum of air temperature exceed 30℃ per-day during booting and heading stages have very significant influence on percentage of unfilled grains. Finally some suggestions on how to prevent disaster of high temperature are put forwards in the paper.