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Interactions of corn meal or molasses with a soybean-sunflower meal mix or flaxseed meal on production, milk fatty acid composition, and nutrient utilization in dairy cows fed grass hay-based diets.
J Dairy Sci. 2015 Jan; 98(1):443-57.JD

Abstract

We investigated the interactions of corn meal or molasses [nonstructural carbohydrate (NSC) supplements] with a soybean-sunflower meal mix or flaxseed meal [rumen-degradable protein (RDP) supplements] on animal production, milk fatty acids profile, and nutrient utilization in dairy cows fed grass hay diets. Eight multiparous and 8 primiparous Jersey cows averaging 135±49d in milk and 386±61kg of body weight in the beginning of the study were randomly assigned to 4 replicated 4×4 Latin squares with a 2×2 factorial arrangement of treatments. Each period lasted 19d with 14d for diet adaptation and 5d for data and sample collection. Cows were fed diets composed of mixed-mostly grass hay plus 1 of the following 4 concentrate blends: (1) corn meal plus a protein mix containing soybean meal and sunflower meal; (2) corn meal plus flaxseed meal; (3) liquid molasses plus a protein mix containing soybean meal and sunflower meal; or (4) liquid molasses plus flaxseed meal. Data were analyzed for main effects of NSC and RDP supplements, and the NSC × RDP supplement interactions. Significant NSC × RDP supplement interactions were observed for milk urea N, milk N efficiency, and the sums of milk saturated, monounsaturated, and polyunsaturated fatty acids. No effect of NSC supplements was observed for nutrient intake and milk yield. However, 4% fat-corrected milk (-0.70kg/d) and energy-corrected milk (-0.60kg/d) were significantly reduced in cows fed liquid molasses due to a trend to decreased concentration of milk fat (-0.17%). Diets with liquid molasses resulted in increased (+35%) concentration and yield of milk enterolactone, indicating that this mammalian lignan can be modulated by supplements with different NSC profiles. Overall, NSC and RDP supplements profoundly changed the milk fatty acid profile, likely because of differences in fatty acids intake, Δ(9)-desaturase indices, and ruminal biohydrogenation pathways. Feeding liquid molasses significantly reduced plasma urea N (-1.2mg/dL), urinary N excretion (-20g/d), and N digestibility (-3.2 percentage units). Flaxseed meal significantly reduced yields of milk (-1.3kg/d), milk fat (-90g/d), and milk lactose (-60g/d), but significantly increased the concentration and yield of milk enterolactone. Further research is needed to elucidate the negative responses of flaxseed meal on yields of milk and milk components.

Authors+Show Affiliations

Department of Biological Sciences, University of New Hampshire, Durham 03824. Electronic address: andre.brito@unh.edu.Dairy and Swine Research and Development Centre, Agriculture and Agri-Food Canada, Sherbrooke, QC, Canada J1M 0C8.Department of Biological Sciences, University of New Hampshire, Durham 03824.USDA-Agricultural Research Service, Pasture Systems and Watershed Management Research Unit, University Park, PA 16802.Department of Biological Sciences, University of New Hampshire, Durham 03824.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

25465544

Citation

Brito, A F., et al. "Interactions of Corn Meal or Molasses With a Soybean-sunflower Meal Mix or Flaxseed Meal On Production, Milk Fatty Acid Composition, and Nutrient Utilization in Dairy Cows Fed Grass Hay-based Diets." Journal of Dairy Science, vol. 98, no. 1, 2015, pp. 443-57.
Brito AF, Petit HV, Pereira AB, et al. Interactions of corn meal or molasses with a soybean-sunflower meal mix or flaxseed meal on production, milk fatty acid composition, and nutrient utilization in dairy cows fed grass hay-based diets. J Dairy Sci. 2015;98(1):443-57.
Brito, A. F., Petit, H. V., Pereira, A. B., Soder, K. J., & Ross, S. (2015). Interactions of corn meal or molasses with a soybean-sunflower meal mix or flaxseed meal on production, milk fatty acid composition, and nutrient utilization in dairy cows fed grass hay-based diets. Journal of Dairy Science, 98(1), 443-57. https://doi.org/10.3168/jds.2014-8353
Brito AF, et al. Interactions of Corn Meal or Molasses With a Soybean-sunflower Meal Mix or Flaxseed Meal On Production, Milk Fatty Acid Composition, and Nutrient Utilization in Dairy Cows Fed Grass Hay-based Diets. J Dairy Sci. 2015;98(1):443-57. PubMed PMID: 25465544.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Interactions of corn meal or molasses with a soybean-sunflower meal mix or flaxseed meal on production, milk fatty acid composition, and nutrient utilization in dairy cows fed grass hay-based diets. AU - Brito,A F, AU - Petit,H V, AU - Pereira,A B D, AU - Soder,K J, AU - Ross,S, Y1 - 2014/11/14/ PY - 2014/05/12/received PY - 2014/09/23/accepted PY - 2014/12/4/entrez PY - 2014/12/4/pubmed PY - 2015/10/28/medline KW - flaxseed meal KW - grass hay KW - lactating dairy cow KW - liquid molasses SP - 443 EP - 57 JF - Journal of dairy science JO - J Dairy Sci VL - 98 IS - 1 N2 - We investigated the interactions of corn meal or molasses [nonstructural carbohydrate (NSC) supplements] with a soybean-sunflower meal mix or flaxseed meal [rumen-degradable protein (RDP) supplements] on animal production, milk fatty acids profile, and nutrient utilization in dairy cows fed grass hay diets. Eight multiparous and 8 primiparous Jersey cows averaging 135±49d in milk and 386±61kg of body weight in the beginning of the study were randomly assigned to 4 replicated 4×4 Latin squares with a 2×2 factorial arrangement of treatments. Each period lasted 19d with 14d for diet adaptation and 5d for data and sample collection. Cows were fed diets composed of mixed-mostly grass hay plus 1 of the following 4 concentrate blends: (1) corn meal plus a protein mix containing soybean meal and sunflower meal; (2) corn meal plus flaxseed meal; (3) liquid molasses plus a protein mix containing soybean meal and sunflower meal; or (4) liquid molasses plus flaxseed meal. Data were analyzed for main effects of NSC and RDP supplements, and the NSC × RDP supplement interactions. Significant NSC × RDP supplement interactions were observed for milk urea N, milk N efficiency, and the sums of milk saturated, monounsaturated, and polyunsaturated fatty acids. No effect of NSC supplements was observed for nutrient intake and milk yield. However, 4% fat-corrected milk (-0.70kg/d) and energy-corrected milk (-0.60kg/d) were significantly reduced in cows fed liquid molasses due to a trend to decreased concentration of milk fat (-0.17%). Diets with liquid molasses resulted in increased (+35%) concentration and yield of milk enterolactone, indicating that this mammalian lignan can be modulated by supplements with different NSC profiles. Overall, NSC and RDP supplements profoundly changed the milk fatty acid profile, likely because of differences in fatty acids intake, Δ(9)-desaturase indices, and ruminal biohydrogenation pathways. Feeding liquid molasses significantly reduced plasma urea N (-1.2mg/dL), urinary N excretion (-20g/d), and N digestibility (-3.2 percentage units). Flaxseed meal significantly reduced yields of milk (-1.3kg/d), milk fat (-90g/d), and milk lactose (-60g/d), but significantly increased the concentration and yield of milk enterolactone. Further research is needed to elucidate the negative responses of flaxseed meal on yields of milk and milk components. SN - 1525-3198 UR - https://www.unboundmedicine.com/medline/citation/25465544/Interactions_of_corn_meal_or_molasses_with_a_soybean_sunflower_meal_mix_or_flaxseed_meal_on_production_milk_fatty_acid_composition_and_nutrient_utilization_in_dairy_cows_fed_grass_hay_based_diets_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0022-0302(14)00776-0 DB - PRIME DP - Unbound Medicine ER -