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Whole-crop pea-oat silages in dairy production

effects of maturity stage and conservation strategy on fermentation, protein quality, feed intake and milk production

Rondahl, Tomas (2007). Whole-crop pea-oat silages in dairy production. Diss. (sammanfattning/summary) Umeå : Sveriges lantbruksuniv., Acta Universitatis agriculturae Sueciae, 1652-6880 ; 2007:112
ISBN 978-91-85913-11-4
[Doctoral thesis]

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Abstract

The thesis summarises and discusses six studies, presented as three papers, concerning harvest and treatment of pea-based silages for use in dairy production. The studies were performed at the Swedish University of Agricultural Sciences Research Farm at Röbäcksdalen, Umeå, Sweden (63'35´N, 20'45´ E) in 2000 – 2004, using Swedish Red cows housed in a tie-stall barn. Maturity stages and silage treatments (acid addition or wilting) were compared for effects. A laboratory silo experiment with whole-crop pea silages revealed that proteolysis was reduced at later maturity stages, and that both wilting and acid addition reduced proteolysis during ensilage. In the other studies, pea-oat bi-crop silages (seed rate 80:20) were produced. In the first study (18 cows), treatment did not change the intake of silage cut when peas were at the flat pods stage, and acid-treatment was preferable for harvesting at desired maturity stages. In the second study (30 cows), including a 7-day in vitro apparent digestibility study (15 cows), wilting to ≥ 250 g kg-1 dry matter, then adding 6 l acid tonne-1 fresh matter, resulted in good quality silages. Silages harvested when peas were at the pod fill, and oats at the early dough stage gave the overall best intake, digestibility and milk production. Finally, a production experiment (48 cows), including a 7-day in vitro apparent digestibility experiment (18 cows), showed that optimally harvested pea-oat bi-crop silage can replace, and improve, the effect of high-quality grass-clover silage on silage intake, diet digestibility and milk production. Thus, it is recommended to harvest pea-oat bi-crop silage (seed rate 80:20) when the peas are at the pod fill stage, wilt it to ≥ 250 g kg-1 dry matter and then add 6 l acid tonne-1 fresh matter. This silage can replace high-quality grass-clover silage (11.3 MJ metabolisable energy) in diets to high-yielding dairy cows, and mixed pea-oat and grass-clover silage (0.50:0.50) has a concentrate-sparing effect.

Authors/Creators:Rondahl, Tomas
Title:Whole-crop pea-oat silages in dairy production
Subtitle:effects of maturity stage and conservation strategy on fermentation, protein quality, feed intake and milk production
Year of publishing :2007
Volume:2007:112
Number of Pages:81
Papers/manuscripts:
NumberReferences
ALLI T. Rondahl, J. Bertilsson and K. Martinsson. 2007. Protein fractions and chemical composition of whole-crop pea silages; effect of maturity stage, conservation strategies and pea cultivar (manuscript). II T. Rondahl, J. Bertilsson, E. Lindgren and K. Martinsson. 2006. Effects of stage of maturity and conservation strategy on fermentation, feed intake and digestibility of whole-crop pea-oat silage used in dairy production, Acta Agriculturae Scandinavica Section A, Animal Science, 56, pp. 137-147. III T. Rondahl, J. Bertilsson and K. Martinsson. 2007. Mixing whole-crop pea-oat silage and grass-clover silage; positive effects on intake and milk production of dairy cows, Grass and Forage Science, 62 (Proof version, in Press).
Place of Publication:Umeå
ISBN for printed version:978-91-85913-11-4
ISSN:1652-6880
Language:English
Publication Type:Doctoral thesis
Full Text Status:Public
Agrovoc terms:whole crop silage, silage making, pisum sativum, avena sativa, maturity, harvesting, timing, wilting, acids, feed additives, preservation, protein quality, dairy cows, feed intake, milk production
Keywords:acid treatment, Avena sativa, concentrate-sparing, dairy cows, grass-clover, intake, maturity stage, pea-oat, Pisum sativum, silage, whole-crop, wilting
URN:NBN:urn:nbn:se:slu:epsilon-1849
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-1849
ID Code:1608
Department:(NL, NJ) > Dept. of Agricultural Research for Northern Sweden
(VH) > Dept. of Agricultural Research for Northern Sweden
Deposited By: Tomas Rondahl
Deposited On:19 Oct 2007 00:00
Metadata Last Modified:02 Dec 2014 10:13

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