Atrazine persistence in soil and transport in surface and subsurface runoff from plots in the coastal plain of the southern united states

W.A. Rohde, L.E. Asmussen, E.W. Hauser, M.L. Hester, H.D. Allison
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引用次数: 16

Abstract

This study evaluated the persistence of atrazine in the soil and movement in surface runoff and shallow phreatic flow. Atrazine persisted in the surface 10 cm of soil for over 4 months. However, it could not be detected at greater depths after approximately 2 months. Persistence (time) in the soil did not vary significantly with application rate. Initial concentrations in the soil did, however, vary significantly. Initial atrazine concentrations in the soil for the 4.48 kg ha−1 application rate were approximately twice those at the 2.24 kg ha−1 rate. Atrazine was not detected in significant amounts in surface runoff after 26 days and was not observed at any time in the subsurface flow from the treated area. Total losses for the 2 rates in 1974 and 1975 ranged from 0.22–2.24%. Concentrations in the soil and surface runoff were directly related to application rates.

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阿特拉津在美国南部沿海平原土壤中的持久性及地表和地下径流的运输
本研究评估了阿特拉津在土壤中的持久性以及在地表径流和浅层潜水流中的运动。阿特拉津在10厘米土壤表层持续存在4个月以上。然而,大约2个月后,在更深的深度无法检测到它。土壤滞留时间随施用量变化不显著。然而,土壤中的初始浓度确实变化很大。施用4.48 kg ha - 1时,土壤中阿特拉津的初始浓度约为施用2.24 kg ha - 1时的两倍。26天后,没有在地表径流中检测到大量的阿特拉津,也没有在任何时候从处理区域流出的地下水流中观察到阿特拉津。1974年和1975年两种费率的总损失为0.22-2.24%。土壤和地表径流中的浓度与施肥量直接相关。
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