Tackling the future challenges of Organic Animal Husbandry - vTI

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! Agriculture and Forestry Research, Special Issue No 362 (Braunschweig, 2012) ISSN 0376-0723 Download: www.vti.bund.de/en/startseite/vti-publications/landbauforschung-special-issues.html Collomb, M., H. Sollberger, U. Butikofer, R. Sieber, W. Stoll, and W. Schaeren. 2004. Impact of basal diet of hay and fodder beet supplemented with rapeseed, linseed and sunflower seed on the fatty acid composition of milk fat Int. Dairy J. 14:549-559. Ellis, K. A., Innocent, G., Grove-White, D., Cripps, P., McLean, W. G., Howard, C. V. & Mihm, M. 2006. Comparing the fatty acid composition of organic and conventional milk. Journal of Dairy Science, 89, 1938-1950. Fuentes, M., S. Calsamiglia, C. Sanchez, A. Gonzalez, J. Newbold, J. Santos, L. Rodriguez-Alcala, and J. Fontecha. 2008. Effect of extruded linseed on productive and reproductive performance of lactating dairy cows. Livest. Sci. 113:144-154. Glasser, F., A. Ferlay, and Y. Chilliard. 2008. Oilseed lipid supplements and fatty acid composition of cow milk: a meta-analysis. J. Dairy Sci. 91:4687-4703. Gonthier, C., A. Mustafa, D. Ouellet, P. Chouinard, R. Berthiaume, and H. Petit. 2005. Feeding micronized and extruded flaxseed to dairy cows: Effects on blood parameters and milk fatty acid composition. J. Dairy Sci. 88:748-756. Hurtaud, C., F. Faucon, S. Couvreur, and J.-L. Peyraud. 2010. Linear relationship between increasing amounts of extruded linseed in dairy cow diet and milk fatty acid composition and butter properties. J. Dairy Sci. 93:1429-1443. 378
Abstract RAHMANN G & GODINHO D (Ed.) (2012): Tackling the Future Challenges of Organic Animal Husbandry. Proceedings of the 2 nd OAHC, Hamburg/Trenthorst, Germany, Sep 12-14, 2012 Cold-pressed rapeseed cake or rapeseed to dairy cows – milk production and profitability – BIRGITTA JOHANSSON, KARL-IVAR KUMM, ELISABET NADEAU 1 Department of Animal Environment and Health, Swedish University of Agricultural Sciences, Skara, Sweden, eMail: birgitta.johansson@slu.se Some cases in Sweden have shown that feeds grown on the own farm contributes less to environmental problems than imported feeds. Rapeseed and its co-product cold-pressed rapeseed cake (CORC) can both be locally produced and CORC has been proven to be suitable for dairy cows. In both feeds the fat content is limiting the amount that can be used in the diet. In a study with scenario calculations, using CORC was, however, found to give a lower financial output than using rapeseed. The aim of the study was to find out how milk yield, milk composition, cow health and fertility were influenced by feeding rapeseed compared to CORC in organic diets, and to calculate the profitability outcome. The study was performed during the indoor period 2009-2010 on 56 Swedish Holstein cows. The diet was 100 % organic and included a mixed ration (silage, grains and minerals) fed ad libitum and a restricted amount of concentrates (CORC vs. ground rapeseed, and field beans that were fed in both treatments). Based on results on milk production and feed consumption and prices of milk and feeds, the financial outcome for each treatment was calculated. There were no significant differences found in milk yield and composition between the feed treatments. However, cows fed rapeseed had a higher intake of the mixed ration than the cows fed CORC, which led to a higher profitability for cows fed the CORC compared to cows fed rapeseed, especially in later lactation. Key words: rapeseed, cake, organic milk production, dairy cow, profitability Introduction Home-grown feeds cause less environmental problems (Strid, 2010) and result in less greenhouse gas emissions (Flysjö et al, 2008) than imported feeds. It may also be economically beneficial for the farmer to increase the proportion of home-grown feed in the diets. The protein in locally produced protein feeds, such as legumes and oilseeds, contain relatively large amounts of rumen degradable protein, which may contribute to decreased milk yield (Wu & Satter, 2000). However, if the cow is simultaneously supplied with carbohydrates for the microbe synthesis, a good production result can be achieved (Børsting et al, 2003). Rapeseed and its co-product cold-pressed rapeseed cake (CORC) can both be locally produced and CORC has been proven to be suitable for dairy cows (Johansson & Nadeau, 2006). The fat content of rapeseed and CORC limits the amount that can be used in the diet (Johansson & Nadeau, 2006). However, rapeseed has a relatively slow release of fat and can be fed in amounts of 1-2 kg per day with only small effects on cow metabolism (Murphy et al, 1987). In a study with scenario calculations, diets including CORC were found to give a lower financial output than diets including rapeseed (Mogensen, 2004). The aim of the study was to investigate the effect of replacing CORC with rapeseed in organic diets on milk yield and composition, cow health and fertility and to calculate the profitability of these feed rations. Material and methodology The study was performed during the indoor period 2009-2010 on 56 Swedish Holstein cows in different lactation stages at Tingvall Organic Farm, Sweden. The rolling herd average was 10842 kg 379
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Foreword Organic animal husbandry s
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Content RAHMANN G & GODINHO D (Ed.)
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Introduction RAHMANN G & GODINHO D
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Abstract RAHMANN G & GODINHO D (Ed.
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Discussion RAHMANN G & GODINHO D (E
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Factors Plant Height (cm) RAHMANN G
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Results RAHMANN G & GODINHO D (Ed.)
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FEC adjusted for dry matter 12000 1
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