草甘膦是世界上使用最广泛的农药。其单次施用对环境影响评价的研究报道甚多,但是,一年生作物多次施用草甘膦对环境的影响甚少有研究报道。有研究发现多次施用同一种农药可能比单次施用对土壤微生物群落的影响更大。巴西研究者报道施用2、3、4次草甘膦相比单次施用,可降低C矿物化并延长除草剂半衰期。 Glyphosate is the most widely used pesticide in the world. However, there are few reports about the environmental impact of multiple applications of annual crops on the environment. Studies have found that multiple applications of the same pesticide may have a greater impact on soil microbial communities than a single application. Brazilian researchers reported that administration of 2, 3, 4 times glyphosate compared to a single administration reduced C mineralization and extended the herbicide half-life.