Assessments of agricultural eco-environmental quality of topsoils in Fuzhou City

Abstract：Geochemical indices and the method of integral values in the hierarchical cluster model are used and 16 indices such as N, P and K2O are chosen to carry out a preliminary classification of the agricultural eco-environmental quality of topsoils in Fuzhou. Five ranks of agricultural eco-environment districts are distinguished. Among them, the general eco-environmental district is largest, accounting for 58% of the total area. The excellent and good eco-environmental districts are relatively small and the area of the two districts is equivalent to the very poor eco-environmental district, accounting for~3%. Most eco-environmental districts are rich in potassium and poor in trace elements and minor elements. According to the characteristic of various eco-environmental districts, the authors put forward suggestions of the overall agricultural planning and layout in Fuzhou.