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Responses of Lactation, Rumen Fermentation and Blood Biochemical Parameters with Increasing Dietary Inulin Supplementation in Mid-Lactation Dairy Cows
| Content Provider | MDPI |
|---|---|
| Author | Zhao, Yiguang Wang, Yue Nan, Xuemei Jiang, Linshu Wang, Yapin Liu, Jun Yao, Junhu Rahman, Tanvir Xiong, Benhai |
| Copyright Year | 2022 |
| Description | 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 $NH_{3}$-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. |
| Starting Page | 521 |
| e-ISSN | 20770472 |
| DOI | 10.3390/agriculture12040521 |
| Journal | Agriculture |
| Issue Number | 4 |
| Volume Number | 12 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-04-07 |
| Access Restriction | Open |
| Subject Keyword | Agriculture Agriculture and Animal Production Dairy Cows Inulin Milk Fatty Acids Serum Metabolites Volatile Fatty Acids |
| Content Type | Text |
| Resource Type | Article |
