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取表层温水灌田使农作物免受冷水灾害,国内外从五十年代起就开始研究,在日本、美国等发达国家六十年代中期就开始大量建设,并取得明显的经济效果。现将各国取表层温水设施叙述如下:
Take surface warm water to fill the field to protect the crops from the cold water disaster. Researches in China and abroad began from the 1950s. In the mid-1960s, Japan, the United States and other developed countries started a large number of constructions and achieved obvious economic results. Now take the surface hot water facilities in various countries described as follows: