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The effect of preservation method of barley, maturity of grass silage, and type of protein supplementation on sensoric milk quality in organic farming

Adler, Steffen A. and Randby, Åshild T. (2006) The effect of preservation method of barley, maturity of grass silage, and type of protein supplementation on sensoric milk quality in organic farming. Paper at: The International Skjervold-Symposium 2006, Oslo, 26-27 December 2006.

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Summary

Three continuous production experiments and three short term cross over experiments were carried out in Northern Norway to investigate different feeding strategies for dairy cows in organic farming. This paper focuses on the effects on sensoric milk quality. Half of the 32 Norwegian red dairy cows in the production experiments were fed 40% (HC) concentrates (on energy basis per year) and the other half 10% (LC). Twelve cows (HC) participated in the short term cross over experiments. The experimental factors in the continuous production experiments were barley preservation method (P1), grass silage maturity (P2) and type of protein supplement (P3), and in the short term cross over experiments barley preservation method (C1), type of protein supplement (C2) and time for fishmeal feeding (C3). In all experiments the cows were offered grass silage ad libitum, restricted amounts of cereals and protein feeds, and mineral and vitamin supplements. The sensoric quality of milk was in general high. In the production experiments, milk from cows in HC had slightly higher quality than from cows in LC (significant in P2, p = 0.04). Neither the preservation method of barley (dried or ensiled with molasses), maturity of grass silage or type of protein supplement (fishmeal or peameal) influenced the sensoric milk quality significantly. Also in the cross over experiments no effect of the studied factors was found in milk flavour and odour. Early harvested grass silage gave significantly lower FFA contents than grass silage cut at normal time (P2) and FM gave significantly lower FFA concentrations than peameal (P3). These results indicate that organic farmers with different feeding regimes can produce milk of first class sensoric quality. Also the content of FFA has been low in all experiments (except C1). However, feeding regimes containing low levels of concentrates may reduce milk taste slightly.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Keywords:NORTHDAIRY, preservation method, barley, maturity, grass silage, protein supplementation, dairy, sensory quality, organic farming, NORTHDAIRY
Subjects: Food systems > Food security, food quality and human health
Animal husbandry > Feeding and growth
Research affiliation: Norway > Bioforsk - Norwegian Institute for Agriculture and Environmental Research > Bioforsk Arctic Agriculture and Land Use Division
Norway > UMB - Norwegian University of Life Sciences
Deposited By: Adler, Steffen A.
ID Code:10571
Deposited On:04 Apr 2007
Last Modified:12 Apr 2010 07:35
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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