Leaching of saflufenacil in soils with different organic matter contents

IF 0.6 4区农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY

Bioscience Journal Pub Date : 2022-09-09 DOI:10.14393/bj-v38n0a2022-54055

Lucas Heringer Barcellos Júnior, Christiano da Conceição de Matos, Gustavo Antônio Mendes Pereira, Dilma Francisca de Paula, Nayara Pereira Capobiango, Antônio Alberto da Silva

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Abstract

Saflufenacil is a herbicide recommended for use in the main agricultural crops in Brazil to control eudicotyledonous weeds. However, the application of saflufenacil has been carried out without previous knowledge of this herbicide interactions with soil colloids, which may increase environmental contamination risks. In this study, the leaching of saflufenacil in soil samples was estimated with different organic matter contents. Therefore, PVC columns were filled with samples of Xanthic Ferralsol (XF) and Ferralsol (F), with different physical and chemical attributes. Twelve hours after herbicide (70 g i.a. ha-1) application, the PVC columns were subjected to a rainfall of 60 mm. For the evaluation of saflufenacil leaching, the columns were sectioned in ten parts with 5-cm each. Saflufenacil leached up to 50 and 40 cm deep in the samples, with the lowest contents of organic matter of XF and F, respectively. The increase in organic matter content of Ferralsol and Xanthic Ferralsol samples reduced saflufenacil leaching and the symptoms of intoxication in the indicator species. There was an inverse relation between the content of organic matter and the leaching of the herbicide in both soils studied. It was observed that the application of saflufenacil in soils with low organic matter contents may represent a significant environmental contamination risk of soils and watercourses.

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氟虫腈在不同有机质含量土壤中的淋溶作用

番红花是一种推荐用于巴西主要农作物的除草剂，用于控制真双子叶杂草。然而，黄曲霉素的应用是在以前不知道这种除草剂与土壤胶体相互作用的情况下进行的，这可能会增加环境污染风险。在本研究中，对不同有机质含量的土壤样品中黄曲霉素的浸出率进行了估算。因此，在PVC柱中填充了具有不同物理和化学性质的黄原铁醇（XF）和铁醇（F）样品。施用除草剂（70 g i.a.ha-1）12小时后，将PVC柱置于60 mm的降雨量下。为了评估黄曲霉素的浸出，将柱分成10个部分，每个部分5cm。红花酚在样品中的浸出深度分别为50和40厘米，XF和F的有机物含量最低。Ferralsol和Xanthic Ferralsol样品中有机物含量的增加减少了指示物种中黄曲霉素的浸出和中毒症状。在所研究的两种土壤中，有机质含量与除草剂的浸出率呈反比。据观察，在有机质含量低的土壤中施用黄曲霉素可能会对土壤和水道造成重大的环境污染风险。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Bioscience Journal Agricultural and Biological Sciences-General Agricultural and Biological Sciences

CiteScore

1.00

自引率

0.00%

发文量

审稿时长

48 weeks

期刊介绍： The Bioscience Journal is an interdisciplinary electronic journal that publishes scientific articles in the areas of Agricultural Sciences, Biological Sciences and Health Sciences. Its mission is to disseminate new knowledge while contributing to the development of science in the country and in the world. The journal is published in a continuous flow, in English. The opinions and concepts expressed in the published articles are the sole responsibility of their authors.