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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.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
dc.rights.license All items in the Atrium are protected by copyright with all rights reserved unless otherwise indicated.
dcterms.relation 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

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