Dept. of Geochemistry, Geological Survey of Denmark and Greenland, DK-1350 Copenhagen, Denmark.
Environ Pollut. 2009 Oct;157(10):2865-70. doi: 10.1016/j.envpol.2009.04.004. Epub 2009 May 17.
Soil organic matter (SOM) is generally believed not to influence the sorption of glyphosate in soil. To get a closer look on the dynamics between glyphosate and SOM, we used three approaches: I. Sorption studies with seven purified soil humic fractions showed that these could sorb glyphosate and that the aromatic content, possibly phenolic groups, seems to aid the sorption. II. Sorption studies with six whole soils and with SOM removed showed that several soil parameters including SOM are responsible for the strong sorption of glyphosate in soils. III. After an 80 day fate experiment, approximately 40% of the added glyphosate was associated with the humic and fulvic acid fractions in the sandy soils, while this was the case for only approximately 10% of the added glyphosate in the clayey soils. Glyphosate sorbed to humic substances in the natural soils seemed to be easier desorbed than glyphosate sorbed to amorphous Fe/Al-oxides.
土壤有机质（SOM）通常被认为不会影响土壤中草甘膦的吸附。为了更深入地了解草甘膦和 SOM 之间的动态关系，我们采用了三种方法：I. 用七种纯化的土壤腐殖质进行吸附研究表明，这些腐殖质可以吸附草甘膦，而芳香族含量，可能是酚类基团，似乎有助于吸附。II. 用六种原状土和去除 SOM 的土进行吸附研究表明，包括 SOM 在内的几个土壤参数是导致土壤中草甘膦强烈吸附的原因。III. 在 80 天的命运实验后，大约 40%的添加草甘膦与沙质土壤中的腐殖酸和富里酸结合，而在粘性土壤中，只有大约 10%的添加草甘膦与腐殖酸和富里酸结合。在天然土壤中与腐殖质结合的草甘膦似乎比与无定形 Fe/Al-氧化物结合的草甘膦更容易解吸。
