The production of sugarcane bioethanol generates large volumes of vinasse, an effluent whose final disposal can produce an environmental impact that is of concern. The long-term disposal of vinasse in sugarcane fields could challenge crop management, such as the performance of traditional herbicides, by changing soil properties. This study aimed to evaluate the effect of long-term vinasse application on the field and the dissipation of atrazine and ametryn herbicides in a subtropical sugarcane agroecosystem, and to discuss the potential processes involved in it. Vinasse affected soil properties by increasing pH (12%), electrical conductivity (160%), and soil organic carbon (25%) at 0–10 cm depth of soil. Differences in the herbicide calculated sorption coefficient (Kd) varied according to the pedotransfer function applied and the herbicide type (atrazine or ametryn). During the first seven days after herbicide application, the soil underwent long-term vinasse application and increased atrazine and ametryn dissipation 45% and 33%, respectively, compared with the conventional fertilization scheme (control). The Pesticide Root Zone Model revealed that dissipation was mediated mainly by the degradation process rather than transport or other processes. The long-term application of vinasse in a typical sugarcane field of Tucumán, Argentina decreased the potential groundwater pollution of triazines and, adversely, reduced their bioavailability for weed control. For this, the present study presents original information about how long-term treatment with vinasse may require an adaptation of conventional management practices such as the application of herbicides in Argentina and other sugarcane-producing regions. Integr Environ Assess Manag 2023;00:1–12. © 2023 SETAC

中文翻译：

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长期施用酒糟增强了阿根廷图库曼甘蔗田中莠去津和莠灭净的初始消散

甘蔗生物乙醇的生产会产生大量酒糟，这种废水的最终处理会对环境产生令人担忧的影响。甘蔗田中酒糟的长期处置可能会改变土壤特性，从而对作物管理提出挑战，例如传统除草剂的性能。本研究旨在评估亚热带甘蔗农业生态系统中长期施用酒糟对田间以及莠去津和莠灭净除草剂消散的影响，并讨论其中涉及的潜在过程。酒糟通过增加土壤 0-10 厘米深度的 pH 值（12%）、电导率（160%）和土壤有机碳（25%）来影响土壤性质。除草剂计算的吸附系数（Kd）的差异根据所应用的pedotransfer函数和除草剂类型（莠去津或莠灭净）而变化。在施用除草剂后的前 7 天内，土壤进行了长期的酒糟施用，与常规施肥方案（对照）相比，莠去津和莠灭净的消散量分别增加了 45% 和 33%。农药根区模型表明，消散主要是通过降解过程而不是运输或其他过程介导的。在阿根廷图库曼的一个典型甘蔗田中长期施用酒糟，减少了三嗪对地下水的潜在污染，并降低了其杂草控制的生物利用度。为此，本研究提供了关于酒糟的长期处理可能需要如何调整传统管理实践的原始信息，例如在阿根廷和其他甘蔗产区使用除草剂。整体环境评估管理2023；00:1–12。© 2023 SETAC 版权所有