Burned rice straw reduces the availability of clomazone to barnyardgrass

The Science of the Total Environment
Chao XuG Daniel Sheng

Abstract

Field burning of crop residue is a common post-harvest practice to dispose of these agricultural by-products and for land clearing. Burned crop residues may effectively adsorb pesticides and thus influence their bioavailability in agricultural soils. The adsorption of clomazone by a soil amended with a burned rice straw (BRS) was measured. The availability of clomazone to barnyardgrass in the soil in the absence and presence of BRS was tested. The BRS was 1000-20,000 times more effective than soil in sorbing clomazone. The sorption of clomazone by soil increased with increasing BRS amount in the soil. In a bioassay, the injury of barnyardgrass 9 days after planting decreased with increasing BRS amount in soil indicating the effect of BRS on clomazone availability. Residual analyses showed higher concentrations of clomazone in soils receiving higher rates of the herbicide than in soils with lower application rates suggesting the adsorptive role of BRS. At typical application rate of clomazone (0.3 microg g(-1)), BRS amounts of 0.02 wt.% and higher caused an appreciable reduction to a complete loss in clomazone availability. Calculations suggest that field burning of rice straw may result in sufficiently high amounts (>0.02 wt.%)...Continue Reading

References

Aug 9, 2003·Journal of Agricultural and Food Chemistry·Yaning Yang, Guangyao Sheng
Sep 5, 2003·Environmental Science & Technology·Yaning Yang, Guangyao Sheng
Jul 1, 2004·Journal of Environmental Quality·Ping ZhangYucheng Feng

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Citations

Jul 17, 2012·Journal of Hazardous Materials·Sheridan M MartinEvelyn Krull
Apr 10, 2012·Journal of Hazardous Materials·Yang SongXin Jiang
Jun 9, 2016·Journal of Environmental Sciences (China)·Mahdi Safaei KhorramYunlong Yu
Jul 3, 2013·Environmental Pollution·B J ReidF Coulon
Mar 19, 2014·Chemosphere·Annika DecheneWulf Amelung
Mar 30, 2017·Journal of Agricultural and Food Chemistry·Beatriz GámizLucía Cox
Jul 25, 2009·Journal of Agricultural and Food Chemistry·Haitao BianLiping Huang

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