近年来,在大棚里栽种黄瓜,结瓜期往往有一批小黄瓜还没有长成商品瓜就大量化掉,直接影响产量和经济效益。化瓜的原因很多,其主要原因是:①棚内温度、湿度不稳定,忽高忽低。晴天气温高没能及时放风,引起棚内高温,或者遇到阴雨天,棚内湿度又下降,寡日照,空气湿度大,或土壤过湿、过干,根系吸收受阻, In recent years, cucumbers planted in greenhouses, cucumbers tend to have a number of gourd cucumbers have not yet grown into a large number of melon off, a direct impact on yield and economic benefits. Melon for many reasons, the main reason is: shed shed temperature, humidity is unstable, fluctuated. Sunny high temperature did not promptly release the wind, causing the shed temperature, or encounter rainy days, the shed humidity has dropped, oligo-sunshine, air humidity, or the soil is too wet, too dry, the root absorption blocked,