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水稻在本田生育期间,水温、泥温对秧苗的影响比气温更为重要。浅水灌溉不仅可以省水节肥,而且是稻田增温的主要办法之一。据试验,3厘米深的水层比7厘米深水层的稻田昼间水温高1.1～2.0℃,泥温高0.4～1.2℃;水深5厘米比水深7厘米的水温高1.0～1.6℃,泥温高0.3～0.8℃。浅水田虽然夜温比深水田稍低,但其昼间增温效果远远大于深水田,增加昼夜温差可以降低水稻呼吸强度,对水稻生育有利。
Rice Honda reproductive period, the water temperature, mud temperature on the seedling more important than the temperature. Shallow irrigation can not only save water and fertilizer, but also one of the main ways of warming rice fields. According to the test, the water depth of 3 cm is 1.1 to 2.0 ° C higher than that of the 7 cm deep paddy field and the temperature of the mud is 0.4 to 1.2 ° C. The depth of 5 cm is 1.0 to 1.6 ° C higher than the water depth of 7 cm, High 0.3 ~ 0.8 ℃. Although the night paddy field has a slightly lower night temperature than the deep paddy field, its daytime warming effect is far greater than that of the paddy field. Increasing the temperature difference between day and night can reduce the respiration intensity of rice, which is beneficial to the growth of rice.