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Agronomic benefits of alfalfa mulch applied to organically managed spring wheat.

Show simple item record Weins, M.J. Entz, M.H. Martin, R.C. Hammermeister, A.M. 2011-10-05T19:22:07Z 2011-10-05T19:22:07Z 2005-09-15
dc.identifier.citation Wiens, M.J., Entz, M.H., Martin, R.C. and Hammermeister, A.M. "Agronomic benefits of alfalfa mulch applied to organically managed spring wheat." Canadian Journal of Plant Science 86 (2006): 121-131 en_US
dc.identifier.issn 0008-4220
dc.identifier.issn 1918-1833
dc.description.abstract Field experiments were established at two locations in Manitoba in 2002 and 2003 to determine N contribution, moisture conservation, and weed suppression by alfalfa mulch applied to spring wheat (Triticum aestivum L). Mulch treatments included mulch rate (amount harvested from an area 0.5×, 1× and 2× the wheat plot area), and mulch application timing (at wheat emergence or at three-leaf stage). Positive relationships were observed between mulch rate and wheat N uptake, grain yield, and grain protein concentration. At Winnipeg, the 2× mulch rates (3.9 to 5.2 t ha–1) produced grain yields equivalent to where 20 and 60 kg ha–1 of ammonium nitrate-N was applied in 2002 and 2003, respectively. Where mulch and ammonium nitrate produced equivalent grain yield, grain protein in mulch treatments was often higher than where chemical fertilizer was used. N uptake was also observed in the following oat (Avena sativa L.) crop. The highest mulch rate (2×) produced higher N uptake and grain yield of second-year oat compared with ammonium nitrate treatments. N use efficiency of mulch-supplied N by two crops over 2 yr [calculated as (treatment N uptake – control N uptake)/total N added] was between 11 and 68%. Mulch usually suppressed annual weeds, with greater suppression with late- than early-applied mulch. Increased soil moisture conservation was observed with high mulch rates (≥ 4.3 t ha–1) at three sites. Alfalfa mulch holds promise for low-input cropping systems when used on wheat at the 2× rates. en_US
dc.language.iso en en_US
dc.publisher Agricultural Institute of Canada en_US
dc.subject Legume N, en_US
dc.subject low-input farming en_US
dc.subject integrated weed management en_US
dc.subject wheat protein en_US
dc.subject N des légumineuses en_US
dc.subject agriculture rationnelle en_US
dc.subject lutte intégrée contre les mauvaises herbes en_US
dc.subject protéines du blé en_US
dc.title Agronomic benefits of alfalfa mulch applied to organically managed spring wheat. en_US
dc.title.alternative Bienfaits agronomiques du paillis de luzerne pour la culture biologique du blé de printemps en_US
dc.type Article en_US
dc.contributor.affiliation Department of Plant Agriculture

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