Theme 19: Use of Supplements
Archived
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Publication Date
2001
Location
Brazil
Description
Thirty crossbread cows grazed stargrass (Cynodon nlenfuensis var. nlenfuensis) receiving 4kg/d of a supplement formulated to provide 115% of metabolizable protein requirements from the 4th to the 11th week of lactation. The cows received either 150g/head/day of Megalac (Control) or 150g/head/day of a Ca-protected conjugated linoleic acid (CLA, Church & Dwight). Residual effects of treatment were evaluated in weeks 12th and 13th. Milk production increased in CLA treated cows (P< 0.05). CLA decreased milk fat content (P< 0.0001) and yield (P< 0.01). Protected CLA increased protein content (P< 0.01) and yield (P< 0.01). The CLA residual effect on milk fat ends within one week after withdrawal but the benefits on milk yield and total solids production continued, due to the increased persistency. The estimated energy balance and intake were not greatly affected by treatment, as treated cows had higher milk volume and had higher protein productions.
Citation
Medeiros, S. R.; Oliveira, D. E.; Aroeira, L. J. M.; McGuire, M.; and Lanna, D. P. D., "Supplementation of Lactating Cows Grazing Stargrass (Cynodon nlenfuensis var. nlenfuensis) with Conjugated Linoleic Acid: Effects on Persistency and Estimated Net Energy Balance" (2001). IGC Proceedings (1985-2023). 14.
(URL: https://uknowledge.uky.edu/igc/19/19/14)
Included in
Agricultural Science Commons, Agronomy and Crop Sciences Commons, Plant Biology Commons, Plant Pathology Commons, Soil Science Commons, Weed Science Commons
Supplementation of Lactating Cows Grazing Stargrass (Cynodon nlenfuensis var. nlenfuensis) with Conjugated Linoleic Acid: Effects on Persistency and Estimated Net Energy Balance
Brazil
Thirty crossbread cows grazed stargrass (Cynodon nlenfuensis var. nlenfuensis) receiving 4kg/d of a supplement formulated to provide 115% of metabolizable protein requirements from the 4th to the 11th week of lactation. The cows received either 150g/head/day of Megalac (Control) or 150g/head/day of a Ca-protected conjugated linoleic acid (CLA, Church & Dwight). Residual effects of treatment were evaluated in weeks 12th and 13th. Milk production increased in CLA treated cows (P< 0.05). CLA decreased milk fat content (P< 0.0001) and yield (P< 0.01). Protected CLA increased protein content (P< 0.01) and yield (P< 0.01). The CLA residual effect on milk fat ends within one week after withdrawal but the benefits on milk yield and total solids production continued, due to the increased persistency. The estimated energy balance and intake were not greatly affected by treatment, as treated cows had higher milk volume and had higher protein productions.
