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Control of quackgrass in Grasslands Using Different Mechanical Weeding Strategies

Journal of Environmental Science and Engineering(B) 2012年第11期1卷 1254-1262页

作者： Rym Khorchani Mohamed Khelifi Murielle Bournival Department of Soils and Agri-Food Engineering Universite Laval Quebec City QC G 1 V 0A 6 Canada Groupe Envir-Eau-Sol Inc. Yamachiche QC GOX 3LO Canada

It is well known that quackgrass is both very aggressive and persistent. In agriculture, many attempts have been made to eliminate this weed without success. Within the context of a sustainable agriculture, mechanical control of quackgrass represents an interesting alternative to chemical means. The use of a ＂C＂ shaped mounted tine cultivator, a rotary cross-harrow, and an ＂S＂ shaped trailed tine cultivator （alone or in combination） to control quackgrass in grassland was investigated. The rate of quackgrass present in each experimental plot was determined before and after the treatments using a one square meter quadrant. Also, the time required for each passage as well as the fuel consumption were computed. Results revealed that the fuel consumption and the time required by the ＂C＂ and ＂S＂ shaped tine cultivators to transport and expose the rhizomes to the sun on the soil surface highly depend on the quality of tillage during the first stubble passage. Also, subsequent tillage with the ＂C＂ shaped tine cultivator after a first passage with a rotary cross-harrow resulted in less fuel consumption and passage time. On the other hand, stubble and subsequent soil tillage with only the ＂C＂ shaped tine cultivator is the least successful method.

关键词： Weeds quackgrass Elymus repens grassland mechanical control tillage tools rotary cross-harrow cultivator.

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