西瓜是极不耐重茬的作物,必须进行5至8年的轮作才行,否则会造成减产甚至绝收,尽管能够选用抗病品种,及用重茬剂灌根,但仍不能杜绝枯萎病的发生,而采用葫芦,南瓜作砧木进行嫁接栽培,能有效地防止枯萎病的发生,且产量可达4000～5000公斤/亩1。其技术要点如下。(一)优选砧木。少量种植可选用葫芦作砧木,葫芦 Watermelon is a crop that is extremely resistant to stubble and must be rotated for 5 to 8 years. Otherwise, it will result in a decrease or even an absolute loss. Although it is possible to select resistant varieties and irrigate roots with stubble, it still can not eliminate the occurrence of blight, The use of gourd, pumpkin for rootstock grafting cultivation, can effectively prevent the occurrence of blight, and the output up to 4000 ~ 5000 kg / mu 1. The technical points are as follows. (A) preferred stock. A small amount of planting can be used as gourd rootstock, hyacinth