外源施加钙对土壤镉形态的影响研究
Study on the effect of exogenous application of calcium on soil cadmium form
李宛蔚 1李海燕 1秦樊鑫1
作者信息
- 1. 贵州师范大学 生命科学学院,贵州 贵阳 550025;贵州省植物生理与发育调控重点实验室,贵州 贵阳 550025
- 折叠
摘要
为探究钙对土壤重金属Cd的影响,通过向土壤中施加四种不同的钙化物,研究钙对土壤pH、土壤Cd的生物有效性以及土壤Cd的化学形态的影响.结果表明,随着钙的施加,土壤pH值逐渐升高,土壤逐渐呈现碱性.钙的施加能够促进土壤对Cd的吸附能力,导致土壤Cd的生物有效性降低,土壤Cd形态逐渐向稳定态转变,且土壤pH与土壤钙含量、土壤可氧化态Cd及土壤残渣态Cd成显著正相关.
Abstract
In order to explore the effect of calcium on soil heavy metal Cd,four different calcifications were applied to the soil to study the effect of calcium on soil pH,bioavailability of soil Cd and chemical form of soil Cd.The results showed that with the application of calcium,the soil pH value gradually in-creased,and the soil gradually became alkaline.The application of calcium can promote the adsorption ca-pacity of soil to Cd,resulting in a decrease in the bioavailability of soil Cd,and the form of soil Cd gradu-ally changes to a stable state,and soil pH is significantly positively correlated with soil calcium content,soil oxidizable Cd and soil residual Cd.
关键词
土壤/重金属/化学形态/Cd污染Key words
soil/heavy metal/chemical speciation/cadmium pollution引用本文复制引用
基金项目
国家自然科学基金委员会-贵州省人民政府喀斯特科学研究中心项目(U1812401)
出版年
2024
NETL
NSTL
万方数据