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为了充分发挥喷灌设备的作用,近年来,国内外对喷灌设备除了用于灌溉外,还用于施肥、喷洒农药、防暑降温、防霜冻等。一九七九年八月二十七日我们用喷灌对种植的土豆,进行了一次防霜冻试验。当天夜间地面最低气温-4.5℃,不喷水的土豆茎叶,翌晨大部枯萎变黑,而喷水的土豆茎叶基本依然浓绿,花朵继续开放。喷灌为什么能防霜冻?其主要原因是:水洒在植物茎叶与土壤上,在冻结时要放出凝结
In order to give full play to the role of sprinkler equipment, in recent years, domestic and foreign irrigation equipment in addition to irrigation, but also for fertilizing, spraying pesticides, summer cooling, anti-frost and so on. On August 27, 1979, we conducted a frost-protection test on the planted potatoes using sprinkler irrigation. On the day of the night the minimum temperature of ground -4.5 ℃, do not spray the stems and leaves of potatoes, the next morning most of the wither dark, while the sprouted stems and leaves are still basically dark green, flowers continue to open. Spray irrigation Why frost? The main reason is: water sprinkled on plant stems and leaves and soil, to freeze when the condensation