以水稻品种汕优63为材料，分析了信阳地区水稻不同生育期的气象条件与产量构成因子之间的相互关系。研究发现分蘖率在300％左右成穗率较高，适宜的日平均温度和日照时数分别为26℃和5.5h；分蘖期有效穗数与日照时数的变化成正比，当日照时数达到5h以上时有效穗数的变化不大；孕穗期温度在28~30℃，日较差在8~10℃时有效穗数较高；孕穗、抽穗期的高温（>30℃）及光照不足（<5h）会显著降低水稻的结实率；灌浆期日照总量、降水总量和气温日较差对水稻千粒重均有影响；各产量构成因子的重要程度依次为结实率>有效穗数>千粒重

Interrelation was analyzed between meteorological conditions in different growth stages and yield components in Xinyang with hybrid rice Shanyou 63. The study showed the ear-bearing tiller percentage became higher while the ratio of productive tiller was about 300%, and appropriate daily mean temperature was 26℃, sunlight duration was 5.5h; panicle number was in direct ratio to sunlight duration in tillering stage, and it was not obvious for the change of panicle number while the sunlight duration was above 5h; there was a high panicle Number in booting stage while the temperature was from 28℃ to 30℃, and the daily range was from 8℃ to 10℃; high temperature (>30℃) and sunlight deficiency (<5h) would decrease the rice seed setting rate remarkably; the total sunlight duration, precipitation and daily range all had effects on the rice grain weight; the importance of each yield component was as follows: seed setting rate>panicle number>grain weight.