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土壤胶体对砂质土柱中草萘胺迁移的影响

Keywords: 草萘胺,土壤胶体,迁移

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Abstract:

采用室内砂柱模拟试验方法研究了红壤和黑土两种土壤胶体对草萘胺在砂质土柱中迁移的影响。结果表明,整个淋滤过程中红壤和黑土胶体的回收率比较高,分别达到66.76%和74.75%;胶体促进了草萘胺在砂质土柱中的迁移,与对照相比(无胶体),加入红壤和黑土胶体后草萘胺的回收率分别提高了9.82%和10.63%。但是吸附在胶体上迁移的草萘胺数量比较少,只占到迁移总量的1.15%(红壤)和1.68%(黑土),物理非平衡机制可能在迁移过程中起支配作用。

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