Wubo Fan, Xuan Chen

(Zhejiang University)

Abstract：

A comprehensive evaluation of soil quality and nutrients in the Houttuynia cordata planting base in Huaihua, Hunan Province was conducted using evaluation methods such as fuzzy linear membership degree model. The results showed that the pollution index (pi value) of each individual evaluation index of soil quality (including pH, cadmium, chromium, mercury, lead, arsenic, chromium, DDT, and BHC) was<1, and the p-value was 0.525 (<0.7), reaching a clean level. This indicates that the soil quality of the base can fully meet the "Soil Environmental Quality Standards" (GB15618-1995) for green traditional Chinese medicine production areas; The soil nutrients in the base are generally high in nitrogen, zinc, and iron content, moderate in phosphorus, potassium, and copper content, and lacking in manganese content. It is recommended to apply manganese fertilizer at an appropriate time; The comprehensive fertility index (IFI) of the base soil is 0.556, and the comprehensive soil quality index (I) is 1.06, indicating that the fertility conditions of the base are more suitable for planting Houttuynia cordata; The factors that affect the soil quality of the standardized production base of Houttuynia cordata greenhouse GAp are, in order, soil macroelements, physicochemical properties, trace elements, and heavy metal pollution.

Key Words：

houttuynia cordata; quality management standards for traditional chinese medicine production; planting base; soil quality