期刊
CANADIAN JOURNAL OF PLANT SCIENCE
卷 95, 期 1, 页码 9-20出版社
AGRICULTURAL INST CANADA
DOI: 10.4141/CJPS-2014-289
关键词
Blackleg; Delia spp.; direct seeding; Leptosphaeria maculans; no-till; oilseed rape; root maggots; rotational diversity; weed populations
资金
- Agricultural Bioproducts Innovation Program (ABIP)
- Prairie Canola Agronomic Research Program (PCARP)
- Agriculture and Agri-Food Canada Canola Cluster Initiative
- Alberta Canola Producers Commission
- Saskatchewan Canola Development Commission
- Manitoba Canola Growers Association
- Canola Council of Canada
- Western Grains Research Foundation
Canola (Brassica napus L.) production has been steadily increasing in western Canada. Here we determine the effect of canola rotation frequency on canola seed yield, quality and associated pest species. From 2008 to 2013, direct-seeded experiments involving continuous canola and all rotation phases of wheat (Triticum aestivum L.) and canola or field pea (Pisum sativum L.), barley (Hordeum vulgare L.) and canola were conducted at five western Canada locations. Fertilizers, herbicides, and insecticides were applied as required for optimal production of all crops. Canola rotation frequency did not influence canola oil or protein concentration or the level of major (composition > 1%) seed oil fatty acids. High canola yields were associated with sites that experienced cooler temperatures with adequate and relatively uniform precipitation events. For each annual increase in the number of crops between canola, canola yield increased from 0.20 to 0.36 Mg ha(-1). Although total weed density was not strongly associated with canola yield, decreased blackleg disease and root maggot damage were associated with greater canola yields as rotational diversity increased. Long-term sustainable canola production will increase with cropping system diversity.
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