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大拱棚西瓜的嫁接育苗是在１２月和１月，正处于一年中最寒冷的季节。若管理不当，会造成大量死苗，损失很大。１９９９年１２月的强寒流天气使我县西瓜育苗的成功率只有７０％左右。西瓜苗价格翻了一番，每株达到１元。因此应在以下几个方面改善和加强。１、改善育苗棚的保温
Large shed watermelon grafted nursery in December and January, is in the coldest season of the year. If not properly managed, will result in a large number of dead seedlings, a great loss. The strong cold weather in December 1999 made the success rate of watermelon seedling raising in our county only about 70%. Watermelon price doubled, each plant reached 1 yuan. Therefore, the following aspects should be improved and strengthened. 1, to improve the insulation of nursery shed