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首页> 外文期刊>Soil and Water Research >Field study of chlorotoluron transport and its prediction by the BPS mathematical model
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Field study of chlorotoluron transport and its prediction by the BPS mathematical model

机译：BPS数学模型对氯甲苯运输的田间研究及其预测

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The chlorotoluron transport in the soil profiles was studied under field conditions on three different soil types of the Czech Republic. The herbicide was applied on 21. 4. 2005 on a four-square meter plot using an application rate of 2 kg/ha. Soil samples were taken on days 35 and 150 from the herbicide application to study the remaining chlorotoluron distributions in the soil profiles. The chlorotoluron distributions in the monitored soils were very similar 35 days after the herbicide application. The major part of chlorotoluron was detected in the top layer of the soil profile (0–8 cm). The highest concentration was obtained in the top 2 cm layer and it decreased gradually with the depth. The percentages of the remaining chlorotoluron 35 days after the herbicide application were similar in Haplic Luvisol (29.97%) and Greyic Phaeozem (30.78%), and slightly higher in Haplic Cambisol (38.58%). The chlorotoluron distributions in the monitored soils differed considerably 150 days after the herbicide application. Chlorotoluron was detected in the entire monitored soils profiles (0–50 cm). The highest concentration was found in all cases in the top 2 cm layer and it decreased gradually with the depth to the depth of approximately 10 cm. Below this level, the herbicide contents were low and the values oscillated randomly. The percentages of the remaining chlorotoluron 150 days after the herbicide application were in the increasing order: Greyic Phaeozem th day after the herbicide application, the simulated herbicide content on the 35th day is twice as high as the measured one. On the other hand, if the half-life degradation of chlorotoluron is estimated based on the remaining chlorotoluron content in the soil profile on the 35th day, the herbicide is almost totally degraded on the 150th day of the model simulation.
机译：在野外条件下研究了捷克共和国三种不同土壤类型中氯甲苯在土壤剖面中的迁移。该除草剂在2. 2005年4月21日在2平方米/公顷的四平方米地块上施用。在施用除草剂的第35天和第150天取土样，以研究土壤剖面中剩余的氯甲苯隆分布。除草剂施用35天后，监测土壤中的氯甲苯隆分布非常相似。在土壤剖面的顶层（0-8厘米）中检测到了氯甲苯的主要部分。在最上面的2 cm层中获得最高浓度，并且随着深度的增加而逐渐降低。除草剂施用35天后，残留的氯甲苯隆的百分比在Haplic Luvisol（29.97％）和Greyic Phaeozem（30.78％）中相似，在Haplic Cambisol（38.58％）中略高。除草剂施用150天后，被监测土壤中的氯甲苯隆分布差异很大。在整个监测的土壤剖面（0-50厘米）中都检测到了氯丙隆。在所有情况下，在最上面的2 cm层中都发现了最高浓度，并且随着深度的增加，浓度逐渐降低到大约10 cm的深度。低于该水平，除草剂含量低，其值随机波动。除草剂施用150天后残留的氯代甲苯隆的百分比呈递增顺序：除草剂施用后的灰色Phaeozem天，第35天模拟除草剂的含量是其两倍。高为实测值之一。另一方面，如果根据第35天土壤中剩余的氯甲苯隆含量估算氯甲苯隆的半衰期，则除草剂在150 几乎全部降解。模型仿真的第三天。

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