Decay characteristics and erosion-related transport of glyphosate in Chinese loess soil under field conditions

X. Yang, Fei Wang, Celia Martins Bento, L. Meng, R.C.J. van Dam, J.G.J. Mol, Guobin Liu, C.J. Ritsema, V. Geissen

Research output: Contribution to journalArticleAcademicpeer-review

14 Citations (Scopus)

Abstract

The decay characteristics and erosion-related transport of glyphosate and aminomethylphosphonic acid (AMPA) were monitored for 35 d at different slope gradients and rates of application in plots with loess soil on the Loess Plateau, China. The initial glyphosate decayed rapidly (half-life of 3.5 d) in the upper 2 cm of soil following a first-order rate of decay. AMPA content in the 0–2 cm soil layer correspondingly peaked 3 d after glyphosate application and then gradually decreased. The residues of glyphosate and AMPA decreased significantly with soil depth (p < 0.05) independently of the slope inclination and application rate. About 0.36% of the glyphosate initially applied was transported from plots after one erosive rain 2 d after the application. Glyphosate and AMPA concentrations in runoff were low while the contents in the sediment were much higher than in the upper 2 cm of the soil.
Original languageEnglish
Pages (from-to)87-95
JournalScience of the Total Environment
Volume530-531
DOIs
Publication statusPublished - 2015

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