| In the beet planting base of Mingyong Township, Ganzhou District, Zhangye City, Gansu Province, the effect of different combined organic materials returning to the field on cultivated land quality and beet quality and benefit was studied by field experiment for 3 consecutive years. The results showed that sheep manure + modified furfural residue + sunflower seed cake group increased the soil total porosity, >0.25mm aggregate, water holding capacity and CEC, and decreased the bulk density, pH value and total salt content. This group increased the soil total porosity and >0.25mm aggregate by 5.28% and 4.24%, respectively, compared with traditional chemical fertilizers. Total water holding capacity and CEC increased by 11.76% and 23.53%, respectively. The bulk density, pH value and total salt content decreased by 9.59%, 9.17% and 7.86%, respectively. Compared with traditional chemical fertilizer, chicken manure + edible fungus residue + rapeseed cake group improved soil organic matter content, enzyme activity, available nitrogen, phosphorus and potassium content, beet fresh root yield, sugar content and fertilizer profit. Soil organic matter content, sucrase activity, urease activity, phosphatase activity and polyphenol oxidase activity were increased by 16.69%, 16.78%, 30.36%, 27.14% and 19.23%, respectively. The content of alkali\|hydrolyzed nitrogen, available phosphorus and available potassium increased by 10.78%, 12.03% and 7.77%, respectively. The yield of fresh root, sugar content and fertilization profit increased by 5.94%, 2.07% and 0.23 million Yuan ·hm-2, respectively. |