Effects of Crop Management on the Fate of Three Herbicides in Soil

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• 作者：Bernhard M. Berger ; Thomas Bernd ; Hubert J. Menne ; Ulla Hackfeld ; and Christina F. Siebert
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：1996
• 出版时间：July 1996
• 年：1996
• 卷：44
• 期：7
• 页码：1900 - 1905
• 全文大小：209K
• 年卷期：v.44,no.7(July 1996)
• ISSN：1520-5118

文摘

The effects of the management of straw, nitrogen fertilization, andapplication rates on the dissipationof metsulfuron-methyl, methabenzthiazuron, and trifluralin wereinvestigated in a 3-year field croprotation study, complemented with laboratory studies. Thedehydrogenase activity in soil wasmeasured as an indicator of the soil microflora. The effects werespecific for the herbicidesinvestigated. The amendment of straw accelerated the dissipationof trifluralin and methabenzthiazuron. Furthermore, the movement of trifluralin, but notmethabenzthiazuron, in the top 30cm of the soil was reduced. Nitrogen fertilization and highapplication rates significantly decreasedonly the dissipation of methabenzthiazuron in the laboratory.Dehydrogenase activity in soil wasinfluenced mainly by the amendment of straw. There was no evidencefor cumulative effects onherbicide dissipation due to crop management within the croprotation.Keywords: Herbicides; degradation; straw incorporation; nitrogenfertilization; application rate