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红薯系喜温好光作物,没有明显的生育期,只要温度适宜,保证充分的水分和养料,生长期越长,产量越高。而我省处在暖温带,降雨量集中在7至8月份,4至5月份干旱多风,气温不稳,对春薯的幼苗生长很不利。我们于1982年、1983年两年利用地膜覆盖春薯,获得了较好的经济效益。试验方法:试验采取盖膜与不盖膜间比排列,重复二次,起埂栽培,一埂双行,埂宽3尺,埂高7～8寸。1982年在刘
Sweet potato thermophilic good light crops, there is no obvious growth period, as long as the temperature is suitable, to ensure adequate water and nutrients, the longer the growing season, the higher the yield. The province is in a warm temperate zone, rainfall concentrated in July to August, April to May arid winds, the temperature is not stable, the growth of seedlings of sweet potato is very detrimental. We use the mulching of spring potato in 1982 and 1983 for two years, and achieved good economic benefits. Test Method: The test to take the cover film and not cover the membrane than the arrangement, repeated twice, from the 埂 cultivation, a 埂 double line, 埂 wide 3 feet, 埂 high 7 to 8 inches. In 1982 in Liu