Abstract：
Glyphosate is widely used in agriculture for weed control; however, it may pollute water systems with its by-product, aminomethylphosphonic acid (AMPA). Therefore, a better understanding of the flows of glyphosate and AMPA from soils into rivers is required. We developed the spatially explicit MARINA-Pesticides model to estimate the annual inputs of glyphosate and AMPA into rivers, considering 10 crops in 10,226 sub-basins globally for 2020. Our model results show that, globally, 880 tonnes of glyphosate and 4,090 tonnes of AMPA entered rivers. This implies that 82 % of the river inputs were from AMPA, with glyphosate accounting for the remainder. Over half of AMPA and glyphosate in rivers globally originated from corn and soybean production; however, there were differences among sub-basins. Asian sub-basins accounted for over half of glyphosate in rivers globally, with the contribution from corn production being dominant. South American sub-basins accounted for approximately two-thirds of AMPA in rivers globally, originating largely from soybean production. Our findings constitute a reference for implementing and supporting effective control strategies to achieve Sustainable Development Goals 2 and 6 (food production and clean water, respectively) simultaneously in the future.
摘要：
草甘膦在农业中广泛用于杂草控制；然而，它的副产品可能会污染水系统，氨甲基膦酸(AMPA)。因此,需要更好地了解草甘膦和AMPA从土壤流入河流。我们开发了空间明确的MARINA-Pesticides模型来估计草甘膦和AMPA进入河流的年度投入，考虑2020年全球10226个子盆地的10种作物。我们的模型结果表明,全球,880吨草甘膦和4090吨AMPA进入河流。这意味着82%的河流输入来自AMPA，其余的是草甘膦。全球河流中超过一半的AMPA和草甘膦来自玉米和大豆生产;然而，子盆地之间存在差异。亚洲子盆地占全球河流草甘膦的一半以上，玉米生产的贡献占主导地位。南美次盆地约占全球河流AMPA的三分之二，主要来自大豆生产。我们的研究结果为实施和支持有效的控制战略以实现可持续发展目标2和6（粮食生产和清洁水，分别)同时在未来。
