Effects of grafting on cucumber soil biochemistry

Effects of cucumber seedling extractions and graft seedling on microbe quantity and enzyme activities in different soil layers were observed by three equipment of root box in general rotation and continuous growing soils.The results showed that grafting could increase the total number of microflora,bacteria and actinomyce,decrease the number of fungi and enhance the activities of polyhenol oxidase,catalase,urease and saccharase;allelopathic potential of grafting on different soil layers were decreased by the increasing form from the root in contrast with control.In addition,effects of grafting were more significant in general rotation that in continuous soils.The results indicated that grafting changed the microbial community,increased the number of benefit microflora,and enhanced soil enzyme activities in near soil layers from root which reduced continuous cropping obstacles,while amendment of grafting on far 5 cm soil layers were not significant.