摘要
通过对滇中农用地耕作层土壤重金属及理化性状的分析检测,进行土壤类型、海拔分布、理化性状与土壤重金属之间的关系分析。结果表明,滇中农用地土壤重金属平均含量均未超过《国家土壤环境质量标准》(GB15618-1995)二级标准限值,不同土壤类型中红壤的重金属含量较高。土壤重金属元素镉随海拔高度的变化较小,其余重金属元素含量受海拔的影响较大。土壤重金属与粘粒含量呈极显著正相关关系,质地粘重的土壤,重金属含量较高。土壤pH与重金属呈正相关关系;土壤有效锰与重金属铅、铬、镉、汞、砷都呈正相关关系;土壤交换性钙镁含量与重金属元素大都呈负相关关系。
The soil heavy metals and physical and chemical properties from agricultural land in central Yunnan province were measured.The relationship analysis of soil type,altitude distribution,physical and chemical properties and soil heavy metals indicated that：（i）The heavy metal content of agriculture soil in central Yunnan province did not reach the maximal residue limit（GB15618-1995）,and the heavy metals content in red soil was higher than that in other types.（ii）The content of cadmium changed slightly with altitude,the content of heavy metals in other soil with altitude varied greatly.（iii）Soil heavy metals was positively（P0.01） related to clay content.Along with the clay content increasing,the content of soil heavy metals became higher.（v）There was a positive correlation between pH,available manganese and heavy metals,and there was a negative correlation between exchangeable calcium and magnesium and heavy metals.
出处
《西南农业学报》
CSCD
北大核心
2012年第5期1765-1769,共5页
Southwest China Journal of Agricultural Sciences
关键词
土壤类型
海拔分布
理化性状
重金属
Soil type
Altitude distribution
Physical and chemical properties
Soil heavy metals
