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- Title
金衢盆地典型地区土壤 -稻米重金属含量及土壤酸碱度的 影响研究.
- Authors
刘冬; 贺灵; 文雪琴; 孙彬彬; 曾道明; 吴超; 成晓梦
- Abstract
BACKGROUND: The absorption of heavy metals in soil by crops is affected by various factors such as crop types, collection sites and physical and chemical soil properties. In recent years, soil acidification of an area in the Jinqu Basin has increased year by year, and the degree of acidification has gradually deepened. OBJECTIVES: In order to find out the content characteristics of heavy metals in soil and crops, the influence of soil acidification on the absorption of heavy metals by crops was studied. METHODS: Based on 264 samples of root soil - rice samples from a typical area of the Jinqu Basin, the characteristics and influencing factors of heavy metal content in soil and crops were studied. RESULTS: The results showed that: (1) The variation coefficient of most heavy metal elements in 264 soil samples was greater than 0.5. Significant positive correlations ( P< 0.01) occurred among the elements of As, Cd, Cr, Cu, Ni, and Zn in soil. 23 soil samples of Cd exceeded the standard, and the over - standard rate was 8. 7 % . The soil samples number of other elements( As, Cr, Cu, Hg, Ni, Pb and Zn) exceeding the standard were no more than 2. (2) The contents of Cu, Zn and Cd in rice were positively correlated, and the enrichment coefficient of the toxic heavy metal element Cd was higher than that of plant nutrient elements Cu and Zn. ( 3) Zn and Cu in rice were positively correlated with soil pH at P < 0.1. Bioconcentration factor ( BCF) of Cd, Cr and Hg were negatively correlated with pH. CONCLUSIONS: It is believed that adjusting soil acidity will reduce the activity of Cd, Hg and other heavy metal elements in the soil, in order to achieve the goal of minimizing the absorption and transport of heavy metal elements in crops. The research results provide scientific data for local food production safety decision and reference for land management and protection.
- Subjects
HEAVY metals; METAL content of soils; HEAVY elements; SOIL acidification; SOIL absorption &; adsorption; SOIL acidity
- Publication
Rock & Mineral Analysis, 2021, Vol 40, Issue 6, p883
- ISSN
0254-5357
- Publication type
Article
- DOI
10.15898/j.cnki.11-2131/td.20211100139