关键词: 重金属, 重金属

Abstract: In order to understand the content of heavy metal in agriculture soil of Huaihua suburbs and provide scientific basis for developing green food production, this research studied the content of Cr, Cu, Zn, As and Pb in different towns and land use types of agriculture soil by using INNOV-X soil heavy metal measurement instrument. It also made the assessment of heavy metal pollution by the method of single factor pollution index and the synthesis pollution index. Results showed that, the content of Cr, Cu, Zn, As and Pb in different towns and land use types of agriculture soil was almost lower than national secondary standard and green food producing area environment quality standard. Both the individual pollution index and the synthesis pollution index were less than 1, which mean there was no heavy metal pollution and the soil was suitable for green food base construction. But the synthesis pollution index of some towns and land use types reached to the alert level. The synthesis pollution index of Yangcun village and Yingkou village were 0.87 and 0.71, and the synthesis pollution index of orchard and nursery were 0.96 and 0.73, especially the nursery almost reached to the light pollution level. Therefore, take measures to prevent and control the heavy metal pollution of agriculture soil is very important to develop the production of green food of Huaihua City.