Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Institute of Soil Ecology, 85764 Neuherberg, Germany.
Chemosphere. 2011 Mar;82(10):1461-7. doi: 10.1016/j.chemosphere.2010.11.037. Epub 2010 Dec 7.
The environmental fate of the worldwide used herbicide isoproturon was studied in four different, undisturbed lysimeters in the temperate zone of Middle Europe. To exclude climatic effects due to location, soils were collected at different regions in southern Germany and analyzed at a lysimeter station under identical environmental conditions. (14)C-isoproturon mineralization varied between 2.59% and 57.95% in the different soils. Barley plants grown on these lysimeters accumulated (14)C-pesticide residues from soil in partially high amounts and emitted (14)CO(2) in an extent between 2.01% and 13.65% of the applied (14)C-pesticide. Plant uptake and (14)CO(2) emissions from plants were inversely linked to the mineralization of the pesticide in the various soils: High isoproturon mineralization in soil resulted in low plant uptake whereas low isoproturon mineralization in soil resulted in high uptake of isoproturon residues in crop plants and high (14)CO(2) emission from plant surfaces. The soil water regime was identified as an essential factor that regulates degradation and plant uptake of isoproturon whereby the intensity of the impact of this factor is strongly dependent on the soil type.
本研究在中欧温带地区的四个未扰动的淋溶土柱中，对全球使用的除草剂异丙隆的环境归宿进行了研究。为了排除因地理位置不同而导致的气候影响，在德国南部的不同地区采集了土壤，并在相同的环境条件下在淋溶土柱站进行了分析。在不同的土壤中，（14）C-异丙隆的矿化率在 2.59%至 57.95%之间变化。在这些淋溶土柱上生长的大麦植物从土壤中部分大量积累（14）C-农药残留，并以 2.01%至 13.65%的施用量（14）C-农药的程度排放（14）CO（2）。植物对（14）CO（2）的吸收与各种土壤中农药的矿化程度呈负相关：土壤中异丙隆的高矿化导致植物吸收减少，而土壤中异丙隆的低矿化导致作物植物中异丙隆残留的高吸收和植物表面的高（14）CO（2）排放。土壤水分状况被确定为调节异丙隆降解和植物吸收的一个重要因素，而该因素的影响强度强烈依赖于土壤类型。
