渭北旱塬长龄果园土壤基本性质与重金属含量及评价

研究了陕西渭北旱塬长龄果园土壤基本性质和土壤中的重金属含量,并对土壤环境质量进行了评价。结果表明:渭北旱塬长龄果园土壤为壤土,土壤容重为1.23~1.54g/cm3,含水量为15.71~19.20%,pH值为7.87~8.53,有机质为1.01~2.23%,CaCO3含量为39.26~149.79g/kg,土壤基本性质特征符合苹果生长土壤环境要求。重金属砷含量范围为15.2~12.7mg/kg,铬为80.1~71.4mg/kg,铜为48.8~22.7mg/kg,铅为34.5~18.4mg/kg,镍为34.0~30.6mg/kg,锌为381.8~56.7mg/kg;长龄果园采样土壤所有环境控制指标的单项污染指数都小于1,综合污染指数小于0.7,土壤环境质量判定为清洁。

Evaluation of Soil Properties and Heavy Metal Contents of Old Orchard Soil in Weibei Dry-land of Shaanxi

This Properties Studied the soil properties and heavy metal contents of old artificial orchard in shaanxi Weibei dry-land,and evaluated the soil environment quality.The results showed that all the soil samples collected from Weibei dry-land old artificial orchard were of loamy soil with the bulk density being 1.23~1.54g/cm3,the water content being 15.71~19.20 %, the pH value being 7.87~ 8.53, the content of organic matter being 1.01~ 2.23%,the content of CaCO3 being 39.26~149.79g/kg.It totally meets the requirements of green apple production . The contents of As,Cr,Cu,Pb,Ni and Zn were 15.2~ 12.7mg/kg,80.1~ 71.4 mg/kg,48.8~ 22.7 mg/kg,34.5~18.4 mg/kg,34.0~30.6 mg/kg,381.8~56.7 mg/kg respectively;The single-factor indices of all soil samples were below 1, the synthetic pollution indices of soil heavy metals were below 0.7,the soil environment quality of old artificial orchard in weibei dry-land was good, reaching th"eclean"levels.