Effects of grapevine field-returning mode on soil nutrients and fruit quality

To increase effective utilization of branches, quickly decompose into fertilizer, increase soil nutrients content, and improve grape fruit quality, purple pearl grape park in Huyi District, Xi'an City, Shaanxi Province was taken as experimental site．Grapevine pruned in previous season was used as experimental materials, soil nutrient content and plant nutrient composition were measured and analyzed after different grapevine field-returning modes to determine the optimal grapevine returning mode．Experiment results showed that compared with blank treatment CK, different treatments could effectively improve soil acidity and alkalinity, significantly increase soil nutrients content and fruit nutrient components．Especially T₄ treatment（straw+organic fertilizer+soil conditioner+microbial agent）field-returning mode to improve soil nutrient content and grape quality obviously．