湿地生态系统土壤粘粒矿物组成特征研究A study on component characteristics of clay minerals in soils of the wetland ecosystem
李美佳;张志丹;王丽群;赵旻爽;崔彬彬;张昊;冯博晗;郭聃;高浪涛;宋雨桐;钟佳君;
摘要(Abstract):
以吉林省7种不同类型土壤(沼泽土、草甸土、潜育黑土、潜育白浆土、水稻土、泥炭土、暗棕壤)为研究对象,在野外采样和室内分析的基础上,对湿地土壤质地及化学组成进行分析,研究土壤粘粒矿物组成特征,探讨其形成机理及演化规律。结果表明:1)土壤质地类型均为壤质土;2)土壤化学组成以SiO_2、Al_2O_3和Fe_2O_3为主,且w(SiO_2+Al_2O_3+Fe_2O_3)>80%;3)土壤硅铝率、硅铝铁率呈现出相同的趋势,潜育黑土>草甸土>泥炭土>暗棕壤>沼泽土>潜育白浆土>水稻土;4)草甸土、潜育白浆土的粘粒矿物组成以伊利石为主,其他土壤均以伊蒙混层为主;5)利用同步辐射装置对暗棕壤进行对比分析,鉴定出了常规光谱中未被识别的矿物(斜长石、伊/蛭混层)。同步辐射衍射光谱具有扫描辨识度强等多种优势,可以成为土壤粘粒矿物特性分析的有效技术。
关键词(KeyWords): 湿地生态系统;土壤质地;粘粒矿物组成;X射线衍射光谱;同步辐射衍射光谱
基金项目(Foundation): 国家自然科学基金项目(编号:41801328);; 吉林省科学技术厅——国际科技合作项目(编号:20220402061GH);吉林省科学技术厅——科技发展计划项目(编号:20190301017NY);; 北京同步辐射装置(BSRF)项目(编号:2019-BEPC-PT-002764; 2021-BEPC-PT-004950)
作者(Authors): 李美佳;张志丹;王丽群;赵旻爽;崔彬彬;张昊;冯博晗;郭聃;高浪涛;宋雨桐;钟佳君;
DOI: 10.16461/j.cnki.1000-4734.2022.42.086
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