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Effect of grassland management in organic and conventional farming systems on bovine milk quality – a field study

Adler, Steffen and Steinshamn, Håvard (2009) Effect of grassland management in organic and conventional farming systems on bovine milk quality – a field study. Workshop at: Workshop on quality and nutrition value of organic milk and meat, Jastrzębiec, Poland, 19.-20. November 2009.

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Online at: http://www.ighz.edu.pl/?p0=4&p1=32&p2=134&p3=135

Summary

Thirty-two dairy farms in Middle-Norway participated in a field study in 2007 and 2008. Nine organic farms with short-term grassland (SO) were paired with 9 conventional farms with short-term grassland (SC) and 7 organic farms with long-term grassland (LO) were paired with 7 conventional farms with long-term grassland (LC) with regard to proximity and calving pattern. Every second month feed and tanker milk samples were collected from each farm. Data from the Norwegian dairy herd recording system were collected and botanical composition before first cut in 2007 was analysed. Milk samples were analysed for chemical composition, fatty acid composition, vitamin concentration, selenium concentration and phytoestrogen concentration. In this paper results from 2007 are presented. Milk quality was more influenced by production system then grassland system. Higher proportions of SFA and lower proportion of oleic acid in milk from O compared to C may be a future challenge for adjusting feed ratios in organic farming in Norway. Red clover stands for the main botanical effect in this study with strong effect on equol concentrations. The potential health effects of equol should be investigated further.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Workshop
Keywords:ORGMILK, grazing, ley management
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Food systems > Food security, food quality and human health
Animal husbandry > Production systems > Dairy cattle
Animal husbandry > Feeding and growth
Research affiliation: Norway > Bioforsk - Norwegian Institute for Agriculture and Environmental Research > Bioforsk Organic Food and Farming Division
Deposited By: Steinshamn, Dr Håvard
ID Code:16858
Deposited On:18 Mar 2010 12:40
Last Modified:12 Apr 2010 07:43
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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