一、育苗期的确定西瓜嫁接育苗的时间不宜过长,育苗时间过长容易导致砧木老化。一般适宜的育苗时间为35~40d。用葫芦砧嫁接育苗,由于葫芦的根系耐老化,育苗时间可适当长一些,以培育大苗争取早熟,适宜的育苗期为40d左右。用南瓜砧嫁接育苗,由于根系不耐老化,育苗时间应适当短一些,以35d左右为宜。二、配置育苗土、制作育苗床低温期西瓜育苗,瓜苗根系的吸 First, the determination of nursery Watermelon grafting time should not be too long, nursery for too long lead to rootstock aging. Generally suitable breeding time is 35 ~ 40d. Grafted with gourd anvil breeding seedlings, the gourd root anti-aging, seedling time may be appropriate to grow older to cultivate seedlings for early maturity, the appropriate seedling stage is 40d or so. Grafted with pumpkin anvil seedlings, because the root system is not resistant to aging, nursery time should be appropriately shorter to 35d or so. Second, the allocation of nursery soil, making nursery bed watermelon seedlings at low temperature, melon root suction