Efecto de microorganismos probióticos sobre la acidosis ruminal en vacas lecheras
This research aims to evaluate the effect of including probiotic microorganisms on ruminal acidosis in dairy cows. A total of 42 Holstein Friesian cows were used in the study, divided into three treatments, Tx1: Lactobacillus acidophilus plus Lactobacillus bulgaricus, Tx2: Saccharomyces cerevisiae p...
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| 主要作者: | |
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| 格式: | masterThesis |
| 語言: | spa |
| 出版: |
2023
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| 主題: | |
| 在線閱讀: | http://repositorio.utc.edu.ec/handle/27000/10784 |
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添加標簽 | 總結: | This research aims to evaluate the effect of including probiotic microorganisms on ruminal acidosis in dairy cows. A total of 42 Holstein Friesian cows were used in the study, divided into three treatments, Tx1: Lactobacillus acidophilus plus Lactobacillus bulgaricus, Tx2: Saccharomyces cerevisiae plus Kluyveromyces fragilis and Tx3: Control treatment. The following variables were evaluated using a completely randomized design: appropriate dose, physical characteristics of the ruminal fluid, microbial activity, blood count, total protein, total cholesterol, AST, body condition, weight gain, and milk quality. The dose of 50 ml presented better results without toxicity and better rates of weight gain. The characteristics of the rumen liquid were significant (p<0. 05) at days 60 and 75, for Tx1 and Tx2, with olive green color, aromatic non-repulsive odor, and presence of flotation, versus Tx3 with milky green color, pungent acid odor and absence of flotation; the pH value was lower for Tx3 with 0. 6 points of difference versus Tx1 and Tx2, the reductase test at days 60 and 75 presented with greater time for Tx3, relating to pictures of ruminal acidosis. Respiratory rate, heart rate, and temperature on days 30 and 75 showed higher values for Tx3, while hematological and biochemical values remained within the established ranges. Body condition and weight gain showed significance (p<0. 05) with better values for Tx1 and Tx3, for length, there was no significant difference during the study. Milk fat at day 75 increased by 0. 3 points in Tx2 vs. Tx3, protein increased by 0. 2 points in Tx2 vs. Tx1 and milk pH showed no significant differences (p<0. 05) between treatments. It is concluded that including probiotics in the feeding of ruminants improves the health of the animals and thus the production parameters. |
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