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限制北方地区西瓜早熟栽培的主要因素是春霜的为害。由于没有切实可行的防霜措施,春霜来临轻的死苗10—35％,重的达80％以上。为了解决北方西瓜早播与春霜冻害的矛盾,我们于1985—1987年对定襄县西瓜各类覆盖防霜效果进行了观察试验,并作了初步理论性分析,总结出以切口撑膜防霜和小拱棚防霜为主体的北方地区西瓜防霜栽培技术,通过三年示范推广,取得良好的经济效益和社会效益。
The main factor restricting the early cultivation of watermelon in northern China is the damage of spring frost. Due to the lack of practicable anti-frost measures, the spring frost comes to 10-35% of light dead seedlings and weighs over 80%. In order to solve the contradiction between the early sowing of watermelon and the frost damage in the spring in the north, we observed and tested the anti-frost effect of watermelon in Dingxiang County from 1985 to 1987, and made a preliminary theoretical analysis. Frost and a small arch shed frost as the main watermelon anti-frost cultivation techniques in North China, through three years of demonstration and promotion, and achieved good economic and social benefits.