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本文在冷害年通过田间栽培和冷水处理的冷害模拟试验，自然条件下验证佐竹等人曾在人工气候室实验证实的前历深水灌溉对水稻孕穗期耐冷性变动的影响及其冷害防止的实际效果。结果表明，前历深水在无冷害的一般年，可增产３％～５％，而冷害年幼穗形成期开始１０ｃｍ深灌的前历深水比普通的５ｃｍ浅水增产１３％～２０％，而前历１０ｃｍ深水同危险期２０ｃｍ深水并用，就增产２０％～３０％．而且前历１０ｃｍ深水的效果，比危险期２０ｃｍ深水的效果还高。
In this paper, cold injury in the cold through years of field cultivation and cold water treatment simulation experiment, natural conditions to verify the Zuo Zhu et al experimentally confirmed in the artificial climate chamber of former calendar deep-water irrigation on bumper cold tolerance changes and the actual effect of chilling prevention . The results showed that the former deep-water can increase 3% ~ 5% in the normal years without chilling damage, whereas the former deep-water in the 10 cm deep irrigation started to increase 13% ~ 20% Calendar 10cm deep with dangerous period 20cm deep water and use, to increase production 20% to 30%. And before the calendar 10cm deep water effect, 20cm deeper than the dangerous period of the effect of water is also higher.