砀山果园场地处黄河故道地区，是全国四大连片果园之一，主产砀山酥梨，土壤属沙性土壤。近年来，由于降雨量减少，灌溉次数增加，以及大量使用化肥，致使土壤板结，根朽病、紫纹羽病、白绍病等根部病害发生严重，造成树势衰弱，甚至死亡，严重地影响水果生产。对于根部病害的 Dangshan Orchard is located in the old course of the Yellow River. It is one of the four major orchards in China. The main producing Dangshansu pear is a sandy soil. In recent years, due to the decrease of rainfall, the increase of irrigation times and the extensive use of chemical fertilizers, the root diseases such as soil compaction, root rot disease, purple-striped feather disease and white shoso-donkey disease occur seriously, causing the decline of tree vigor and even death and seriously affecting Fruit production. For the root disease