Ismail B S, Ooi K E
School of Environmental and Natural Resource Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 UKM, Bangi, Malaysia.
J Environ Biol. 2012 May;33(3):573-7.
Laboratory experiments were conducted to evaluate adsorption, desorption and mobility of metsulfuron-methyl in soils of the oil palm agroecosystem consisting of the Bernam, Selangor, Rengam and Bongor soil series. The lowest adsorption of metsulfuron-methyl occurred in the Bongor soil (0.366 ml g(-1)), and the highest in the Bemam soil (2.837 ml g(-1). The K(fads) (Freundlich) values of metsulfuron-methyl were 0.366, 0.560, 1.570 and 2.837 ml g(-1) in Bongor, Rengam, Selangor and Bemam soil, respectively. The highest K(fdes) value of metsulfuron-methyl, observed in the Bemam soil, was 2.563 indicating low desorption 0.280 (relatively strong retention). In contrast, the lowest K(fdes) value of 0.564 was observed for the Bongor soil, which had the lowest organic matter (1.43%) and clay content (13.2%). Soil organic matter and clay content were the main factors affecting the adsorption of metsulfuron-methyl. The results of the soil column leaching studies suggested that metsulfuron-methyl has a moderate potential for mobility in the Bernam and Bongor soil series with 19.3% and 39%, respectively for rainfall at 200 mm. However, since metsulfuron-methyl is applied at a very low rate (the maximum field application rate used was 30 g ha(-1)) and is susceptible to biodegradation, the potential forground water contamination is low.
进行了实验室实验，以评估甲磺隆在由霹雳州、雪兰莪州、林加姆和邦戈尔土壤系列组成的油棕农业生态系统土壤中的吸附、解吸和迁移情况。甲磺隆在邦戈尔土壤中的吸附量最低（0.366 ml g(-1)），在霹雳州土壤中最高（2.837 ml g(-1)）。甲磺隆在邦戈尔、林加姆、雪兰莪和霹雳州土壤中的K(fads)（弗伦德利希）值分别为0.366、0.560、1.570和2.837 ml g(-1)。在霹雳州土壤中观察到的甲磺隆最高K(fdes)值为2.563，表明解吸率低（0.280，相对较强的保留）。相比之下，邦戈尔土壤的K(fdes)值最低，为0.564，该土壤的有机质含量（1.43%）和粘土含量（13.2%）最低。土壤有机质和粘土含量是影响甲磺隆吸附的主要因素。土壤柱淋溶研究结果表明，甲磺隆在霹雳州和邦戈尔土壤系列中的迁移潜力适中，200毫米降雨量时的迁移率分别为19.3%和39%。然而，由于甲磺隆的施用量非常低（使用的最大田间施用量为30 g ha(-1)）且易被生物降解，因此对地下水污染的可能性较低。
