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Responses of Lactation, Rumen Fermentation and Blood Biochemical Parameters with Increasing Dietary Inulin Supplementation in Mid-Lactation Dairy Cows
- Source :
- Agriculture, Vol 12, Iss 4, p 521 (2022)
- Publication Year :
- 2022
- Publisher :
- MDPI AG, 2022.
-
Abstract
- Effects of dietary supplementation of inulin in dairy cows were investigated in this study. Thirty-six mid-lactation Holstein dairy cows were randomly divided into six groups with six cows per group and offered a total mixed ration supplemented with 0 (control), 50, 150, 200, 250 and 350 g/d inulin per head, respectively. The animals were pre-fed for 2 weeks before rumen fluid, milk and blood samples were collected weekly for 3 weeks. With increasing inulin doses, milk yield (p < 0.01) and milk fat concentration (p = 0.04) were linearly increased, while milk urea nitrogen (p < 0.01) and somatic cell count (p = 0.04) were linearly decreased. Linear increases were also detected in the proportions of milk saturated fatty acids (p < 0.01) and polyunsaturated fatty acids (p = 0.04); however, milk monounsaturated fatty acids were linearly decreased (p = 0.04). The ruminal concentrations of acetate, propionate and butyrate increased, while the ruminal pH and the concentration of NH3-N reduced at a decreasing rate with increasing inulin doses (p < 0.01). Moreover, the concentrations of lactic acid (p = 0.03) and total volatile fatty acids (p < 0.01) were linearly upregulated. There were linear increases in the serum concentrations of superoxide dismutase (p = 0.02), immunoglobin G (p < 0.01), immunoglobin M (p = 0.04), interleukin-2 (p < 0.01) and interleukin-10 (p = 0.04); quadratic increases in serum total protein (p < 0.01) and albumin (p = 0.02) and linear decreases in serum total cholesterol (p = 0.02), triglyceride (p < 0.01) and malondialdehyde (p < 0.01). The results indicated that inulin increased milk production, shifted milk fatty acid profile, upregulated rumen volatile fatty acid concentration, and enhanced antioxidant and immunity function in dairy cows in a dose-dependent manner.
Details
- Language :
- English
- ISSN :
- 20770472
- Volume :
- 12
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- Agriculture
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.42c5f0fc450243d29e47ab2f75a00c35
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/agriculture12040521