无子西瓜种子发芽率低和成苗率低,是当前生产上普遍存在的问题,在早春育苗过程尤其突出。根据近两三年的观察,催芽播种以后或出芽期间,遇到连续几天以上的低温阴雨,日平均温度15～18℃以下时,出苗率仅15%以下,成苗率10%以下,病死率和烂秧率很高。为了解决这个问题, Seedless watermelon seed germination rate and low seedling rate, is currently a common problem in production, especially in early spring nursery process. According to the past two or three years of observation, germination after sowing or during budding, met more than a few days of low temperature rainy days, the average daily temperature of 15 ~ 18 ℃ below the germination rate of only 15% less than 10% of seedlings, died of disease Rate and rotten seedling rate is high. To solve this problem,