Sorption and desorption of ametryn in Brazilian Latosols

Planta Daninha

Silva, L.O.C.¹  UFV¹  D'Antonino, L.¹  Freitas, F.C.L.¹  Lima, C.F.¹  Universidade Federal Rural do Semi-Árido¹  Queiroz, M.E.L.R.¹  Silva, A.A.¹ 

关键词:  herbicide;    soil;    batch equilibrium;    liquid chromatography;    Freundlich isotherms.;   

DOI  :  10.1590/S0100-83582012000300020

学科分类：农业科学（综合）

来源: Sociedade Brasileira da Ciencia das Plantas Daninhas (S B C P D) / Brazilian Society of Herb Science

【 摘 要 】

Knowledge of herbicide retention processes in soil is fundamental to predict leaching potential, degradation, and weed control efficiency. The objective of this study was to evaluate the processes of sorption and desorption of ametryn in four Brazilian soils: Red-Yellow Latosol (LVA), Red-Yellow humic Latosol (LVAh), Red Latosol (LV), and Yellow Latosol (LA), with different pH values. Thus, the method "Batch Equilibrium" was applied under controlled laboratory conditions, and analysis by high performance liquid chromatography using UV-Vis detector at 245 nm. Considering the values of the modified Freundlich constant (K'f), the following increasing sorption order of ametryn was verified: LV pH 6.06 <5.00 LV pH <6.30 LA pH <6.11 pH LVA

【 授权许可】

Unknown