土壤2026，Vol.58Issue(2)：451-458,8.DOI:10.13758/j.cnki.tr.202503300117
不同外源溶解性有机质对黑土与红壤中烟嘧磺隆吸附行为的影响机制
Mechanisms of Different Exogenous Dissolved Organic Matter Affecting Nicosulfuron Adsorption in Black Soil and Red Soil
摘要
Abstract
This study investigated the adsorption behavior of Nicosulfuron(NIF)in black soil and red soil,as well as the impact of dissolved organic matter(DOM)derived from manure and straw on NIF adsorption.Results showed that black soil,with its higher organic matter content,had significantly stronger adsorption capacity for NIF than red soil.The addition of exogenous DOM significantly inhibited NIF adsorption in both soils,with manure-derived DOM having a more pronounced inhibitory effect than straw-derived DOM.The adsorption kinetics followed the Elovich model,where DOM reduced the initial adsorption rate through competitive adsorption,site shielding,and complex formation.Isotherm models indicated that NIF adsorption in black soil was mainly driven by chemical adsorption,while in red soil,it was dominated by hydrophobic interactions.FT-IR analysis revealed that DOM enhanced the binding of NIF to soil-DOM complexes through hydrogen bonding and coordination.This study elucidates the regulatory role of DOM on environmental behavior of NIF and provides a theoretical basis for assessing the impact of exogenous DOM input on herbicide behavior in agricultural soils.关键词
磺酰脲类除草剂/烟嘧磺隆/溶解性有机质/土壤吸附/竞争吸附Key words
Sulfonylurea/Nicosulfuron/Dissolved organic matter/Soil adsorption/Competitive adsorption分类
资源环境引用本文复制引用
祝鹏,孙昭玥,施维林..不同外源溶解性有机质对黑土与红壤中烟嘧磺隆吸附行为的影响机制[J].土壤,2026,58(2):451-458,8.基金项目
中国科学院战略性先导科技专项(XDA28010501)和国家自然科学基金项目(42207028)资助. （XDA28010501）
