西瓜、甜瓜等瓜类作物不能在同一地块上连年种植，重茬种植可导致枯萎病、根腐病及其他土传病害的严重发生，轻者减产20％～30％，重者减产70％以上，甚至绝产，对瓜类生产造成严重威胁。为探索一条克服瓜类土传病害的新路子，笔者于2000年3月进行了西瓜、甜瓜重茬地氯化苦土壤 Watermelons, melons and other melons crops can not be planted in the same plots year after year, cropping can lead to the occurrence of blight, root rot and other soil-borne diseases, the severity of the reduction of 20% to 30%, the heavy reduction of more than 70% , Or even abortion, pose a serious threat to melon production. In order to explore a new way to overcome melon soil-borne diseases, the author carried out in March 2000 watermelon, melon stubble soil chloropicrin