土壤与作物2025，Vol.14Issue(2)：168-179,12.DOI:10.11689/sc.2024111201
云南省思茅区有机茶园土壤肥力与生态风险评估
Assessment of soil fertility and ecological risk on organic tea plantations in Simao District,Yunnan Province
摘要
Abstract
Clarifying the nutrient status and heavy metal content of soil in organic tea gardens can provide a scientific basis for soil nutrient management,fertility improvement,and ecological risk warning in organic tea plantations.In this study,soil samples were collected from 72 organic tea plantations in seven major tea-producing townships in Simao District,Pu'er City,Yunnan Province;the contents of eight heavy metals,including chromium,lead,arsenic,zinc,copper,mercury,cadmium and nickel were determined;and six soil nutrient parameters,including soil pH,organic matter,total nitrogen,available phosphorus,available potassium and cation exchange capacity were analyzed.The results showed that the average value of soil pH of organic tea plantations in Simao District is 4.44,and 37.5%of soils are in Grade I quality standard.The indexes of organic matter,total nitrogen,and available phosphorus of soils are higher than the quality standard.Furthermore,the application of the soil Integrated Fertility Index(IFI)for the comprehen-sive evaluation of soil nutrient status and fertility quality revealed that the IFI value ranges from 0.25 to 1.00 with an average of 0.66,22.2%,and 68.1%of the tea gardens soils belongs to Class I,II quality standard,and the excellent rate is 90.3%.The average levels of Cd,Cu,Pb,Cr,Hg,As,Zn,and Ni in the soil are 0.14 mg∙kg-1,13.8 mg∙kg-1,16.4 mg∙kg-1,39.5 mg∙kg-1,0.03 mg∙kg-1,14.3 mg∙kg-1,38.4 mg∙kg-1,and 16.0 mg∙kg-1,respectively.The maximum and minimum values of Hakanson potential ecological risk index(RI)are 245.0 and 46.3 respectively,and the mean value is 91.2(<150).The overall soil nutrient status of the organic tea gardens is excellent with a high IFI for soil fertility and a low RI for potential ecological risk though some areas have serious soil acidification.关键词
有机茶园/土壤肥力/重金属/生态风险Key words
organic tea plantation/soil fertility/heavy metals/ecological risk分类
农业科学引用本文复制引用
刘志薇,王启,伯年国,王藤,陈平,李成华,赵明..云南省思茅区有机茶园土壤肥力与生态风险评估[J].土壤与作物,2025,14(2):168-179,12.基金项目
云南省思茅区茶叶产业科技特派团项目(202104BI090008). （202104BI090008）
