一、青苗时间要想西瓜早上市,唯一的捷径是早育苗,育大苗,育壮苗,提早定植,实行双膜覆盖,也有的人认为只要施行双膜覆盖。就可提前,往往忽视了当地气温情况,不按季节过份提早,造成冻死幼苗而失败。因此,一是选择优质高产的早熟品种,二是按季节适当提前育苗。早熟育苗一般在3月中、下旬至4月上旬,寒冷地区可在3月下旬,至4月上、中旬。根据不同地区的气温,在防寒设备好的情况下, First, the young time to watermelon morning to the market, the only shortcut is early nursery, nurturing big seedlings, nurturing seedlings, early colonization, the implementation of double-film coverage, and some people think that as long as the implementation of double-film coverage. Can be ahead of time, often overlook the local temperature conditions, not too early in the season, resulting in frozen seedlings failed. Therefore, one is to choose good quality and high yield of early maturing varieties, and the other is to raise seedlings according to the season in advance. Premature nursery usually in mid-March, late to early April, cold areas in late March, April to mid-May. According to the temperature in different regions, in the case of good cold equipment,