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水稻是我国南方的主要灌溉作物,其耗水量占总耗水量的大部分。在可用水量不断减少,需水量不断增加的今天,研究水稻需水量的变化规律,找出影响水稻需水量的主要因素,寻求计算水稻需水量的实用方法,显得日趋重要。水稻需水量受气象因素、环境条件、生育阶段等多种因素的影响,但它也应该有自己的规律。过去,我国许多学者对水稻各生育阶段的需水量变化规律以及日需水量变化规律进行了研究,但没有研究水稻需水量在一天内不同时间的变化
Rice is a major irrigated crop in southern China whose water consumption accounts for most of the total water consumption. Nowadays, with the decrease of available water and the increasing demand of water, it is more and more important to study the variation law of water demand of rice and identify the main factors that affect the water demand of rice. Water demand of rice is affected by many factors, such as meteorological factors, environmental conditions and the stage of birth, but it should also have its own laws. In the past, many scholars in our country studied the variation law of water requirement and daily variation of water requirement at different growth stages of rice, but did not study the changes of rice water demand at different times of the day