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Asian-Australas J Anim Sci > Accepted Articles
DOI: https://doi.org/10.5713/ajas.19.0457    [Accepted] Published online August 23, 2019.
Partial replacement of soybean meal by white lupine seeds in the diet of dairy cows
Miroslav Joch1,2,*  , Václav Kudrna2 
1Department of Microbiology, Nutrition and Dietetics, Czech University of Life Sciences, Prague 16500, Czech Republic
2Department of Nutrition and Feeding of Farm Animals, Institute of Animal Science, Prague 10400, Czech Republic
Correspondence:  Miroslav Joch, Tel: +420-22-438-2669, Fax: +420-22-438-2760, Email: joch@af.czu.cz
Received: 3 June 2019   • Revised: 7 July 2019   • Accepted: 5 August 2019
Abstract
Objective
An experiment was conducted to determine the effect of partial replacement of soybean meal (SBM) by white lupine seeds (WLS) on milk yield and quality, feed efficiency and rumen fermentation of high-yielding dairy cows.
Methods
Thirty multiparous cows of two breeds (20 Holstein and 10 Czech Pied cows) in early mid-lactation received three diets (treatments) in a 3 × 3 Latin square design with a 28-d period. The dietary treatments were as follows: CON (control total mixed ration with SBM, no WLS), WLS30 (30% of the SBM was replaced, on a DM basis, by WLS), and WLS50 (50% of the SBM was replaced by WLS).
Results
Feed intake by the cows was not affected (p = 0.331) by the diets. Milk production decreased with increasing proportions of WLS in the diet. Cows fed WLS50 yielded approximately 1 kg/d (p < 0.001) less milk than cows fed the CON diet. The proportions of milk fat (p = 0.640), protein (p = 0.507), and lactose (p = 0.709) were not altered by the diet. For milk fat, feeding with WLS50 reduced the proportion of total short-chain fatty acids (SFA; p < 0.001) and increased the proportion of total monounsaturated fatty acids (MUFA; p < 0.001), mainly through oleic acid (p < 0.001). No differences were found in feed efficiency, body weight, and blood plasma metabolites between groups. Rumen ammonia-N levels tended (p = 0.087) to increase with increasing proportions of WLS in the diet, whereas no effect of diet on rumen pH was found (p = 0.558).
Conclusion
We did not identify the safe range within which raw WLS can efficiently replace SBM in the diet of high-producing dairy cows. In contrast, even partial replacement of SBM by WLS favorably changed the milk FA profile.
Keywords: Dairy Cow; Milk Production; Soybean Meal; Lupine; Methionine


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