异丙甲草胺在不同类型土壤中的吸附和淋溶特性研究

【目的】研究异丙甲草胺在甘蔗种植区3种代表性土壤中的吸附和淋溶特性。【方法】采用批量平衡法和土柱淋溶法,研究其在不同土壤中的吸附淋溶特性。【结果】异丙甲草胺在广西来宾壤土、扶绥壤质粘土和安徽萧县粉砂质壤土中的吸附规律均可以用Freundlich方程较好描述,土壤有机碳归一化吸附系数（KOC）分别为75.71、35.80和34.93,吸附常数（Kf）分别为7.58、3.06、3.12;表明异丙甲草胺在壤土中较难吸附,在另两种土壤中属难吸附;吸附自由能（△G）为-10.73、-8.87、-8.81 KJ/mol,均属于物理吸附;【结论】异丙甲草胺在粉砂质壤土中可淋溶,在壤土和壤质黏土中为较难淋溶,...

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Published in西南农业学报 Vol. 30; no. 12; pp. 2751 - 2755
Main Author 冯玉洁;谢圣华;田海;潘飞;梁延坡;曾东强
Format Journal Article
LanguageChinese
Published 海南省农业科学院植物保护研究所,海南省植物病虫害防控重点实验室,海南海口571100 2017
广西大学农药与环境毒理研究所,广西南宁530004%海南省农业科学院植物保护研究所,海南省植物病虫害防控重点实验室,海南海口571100%中国热带农业科学院分析测试中心,海南海口,571100%广西大学农药与环境毒理研究所,广西南宁,530004
Subjects
吸附
土壤
异丙甲草胺
淋溶
异丙甲草胺
Metolachlor
Adsorption
吸附
淋溶
Soil
Leaching
土壤
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Summary:【目的】研究异丙甲草胺在甘蔗种植区3种代表性土壤中的吸附和淋溶特性。【方法】采用批量平衡法和土柱淋溶法,研究其在不同土壤中的吸附淋溶特性。【结果】异丙甲草胺在广西来宾壤土、扶绥壤质粘土和安徽萧县粉砂质壤土中的吸附规律均可以用Freundlich方程较好描述,土壤有机碳归一化吸附系数（KOC）分别为75.71、35.80和34.93,吸附常数（Kf）分别为7.58、3.06、3.12;表明异丙甲草胺在壤土中较难吸附,在另两种土壤中属难吸附;吸附自由能（△G）为-10.73、-8.87、-8.81 KJ/mol,均属于物理吸附;【结论】异丙甲草胺在粉砂质壤土中可淋溶,在壤土和壤质黏土中为较难淋溶,其在粉砂质壤土中移动性较壤质粘土和壤土强,对地下水造成污染的可能性较大。
Bibliography:Metolachlor ; Soil; Adsorption ; leaching
FENG Yu-jie1,2, XIE Sheng-hua1 ,TIAN Hai3 , PAN Fei1 , LIANG Yan-po1 , ZENG Dong-qiang2. （ 1. Institute of Plant Protection, Hainan Academy of Agricultural Science, Laboratory for Control of Plant Diseases and insect Pests, Hainan Haikou 571100, China ; 2. Institute of Pesticide ＆ Environmental Toxicology, Guangxi University, Guangxi Nanning 530004, China; 3. A- nalysis and Testing Center, CATAS, Hainan Haikou 571100, China）
51-1213/S
Objective】The adsorption and leaching behavior of metolachlor in different soils were studied.【Method】The adsorption and leaching of metolachlor in different soils were conducted by batch equilibrium and column leaching experiments.【Result】The adsorption of metolachlor in the tested soils was better fitted by the empirical Freundlich adsorption isotherm,and the adsorption constants（ Kf） in Guangxi loam soil,Guangxi loamy clay、Anhui sandy loam were 7. 58,3. 06 and 3. 12. The organic carbon partition coefficients（ KOC） were 75. 71、35. 80 and
ISSN:1001-4829
DOI:10.16213/j.cnki.scjas.2017.12.023