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我区晚稻产量年际间波动较大,丰、欠年结实率的变化较为激烈,在影响结实率高低的种种因素中,天气是一个重要的因素。从近九年来的资料看:九月下旬、十月上中旬的气温和日照与当年的结实率有关,如一九七五年气温高,日照足,我室迟熟品种的结实率85.3％,产量高;一九七六年气温低,日照少,结实率65.9％,产量低。而这段时间,在桂南稻作区正是晚稻早熟品种的抽穗扬花期、迟熟品种的花粉母细胞减数分裂期或抽穗期。因此,研究气象因素对晚稻生产
The yield of late rice in our district fluctuated greatly during the year, and the change of fruitfulness and abundance in the year and year was more intense. Among the various factors affecting the seed setting rate, the weather was an important factor. According to the data of the past nine years, in late September and mid-October, the temperature and sunshine are related to the current year’s seed-setting rate. For example, in 1975, when the temperature was high and the sunshine was sufficient, the seed-setting rate of late maturing varieties in our room was 85.3% High yield; low temperature in 1976, less sunshine, seed set rate of 65.9%, low yield. During this time, it is the heading and flowering stage of the early rice varieties of late rice and the meiosis or heading stage of the late maturing rice varieties in the paddy area of southern Guangxi. Therefore, the study of meteorological factors on late rice production