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本文综合分析了气象因素对水稻需水量强度的影响,结果表明:气象因素是影响水稻需水量强度的主要因素。根据白岩脚试验站1983～1986四年的试验资料,对该站所控制的灌区水稻需水量经验计算公式进行了推导和探讨。采用本公式计算水稻需水量,与实测需水量历年相对误差在0.6～-2.5％,故其精度完全能满足要求。认为本公式能基本适用于六枝特区范围,与六枝特区气象条件大致相同的地区亦可参考应用。
This paper analyzes the impact of meteorological factors on the water requirement of paddy rice. The results show that the meteorological factors are the main factors that affect the water requirement of rice. According to the experimental data of Baiyan Experimental Station from 1983 to 1986, the empirical formula of rice water requirement in the irrigated area under control of the station was deduced and discussed. This formula is used to calculate the water requirement of paddy rice, and the measured water demand over the years has a relative error of 0.6 ~ 2.5%, so its accuracy can fully meet the requirements. It is considered that this formula can be basically applied to the six branches of the SAR, which can be used for reference in areas roughly the same as the meteorological conditions of the six branches.