Promotion of weed species diversity and reduction of weed seedbanks with conservation tillage and crop rotation

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Promotion of weed species diversity and reduction of weed seedbanks with conservation tillage and crop rotation

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dc.contributor.author Murphy, Stephen D.
dc.contributor.author Clements, David R.
dc.contributor.author Belaoussoff, Svenja
dc.contributor.author Kevan, Peter G.
dc.contributor.author Swanton, Clarence J.
dc.date.accessioned 2011-01-06T22:43:09Z
dc.date.available 2011-01-06T22:43:09Z
dc.date.issued 2006
dc.identifier.citation Murphy, S. D., Clements, D. R., Belaoussoff, S., Kevan, P. G., and Swanton, C. J. "Promotion of weed species diversity and reduction of weed seedbanks with conservation tillage and crop rotation." Weed Science 54.1 (2006) 69-77
dc.identifier.uri http://hdl.handle.net/10214/2409
dc.description.abstract In a 6-yr study on four farms (36 fields) in Ontario, Canada, we tested the effects of tillage (moldboard, chisel plow, no tillage) and crop rotations (continuous corn, corn-soybean, corn-soybean-winter wheat) on emerged and seedbank weed species diversity and density. Aside from the imposed experimental treatments, all other management was generally consistent among farms. Tillage had the largest effect on weed diversity and density. No tillage promoted the highest weed species diversity, chisel plow was intermediate, and moldboard plow resulted in the lowest species diversity. These results are consistent with ecological succession theory. The increase in weed species diversity resulted from 20 species being associated with no tillage systems, 15 of which were winter annuals, biennials, or perennials. Emerged weed density was affected only by tillage. Over 6 yr, seedbank declined in no-tillage systems from 41,000 to 8,000 seeds m−3. Crop yields were not affected by tillage or crop rotation. In practical terms, reduced tillage in combination with a good crop rotation may reduce weed density and expenditures on weed management.
dc.language.iso en en_US
dc.publisher Weed Science en_US
dc.subject No tillage en_US
dc.subject on-farm research en_US
dc.subject succession en_US
dc.subject weed density en_US
dc.subject weed life history en_US
dc.title Promotion of weed species diversity and reduction of weed seedbanks with conservation tillage and crop rotation en_US
dc.type Article en_US


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