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[DL-metioninut pri khraneneto na laktirashchi kravi]
Abstract:
Triais with a total of 240 cows were carried out. The animals were given 30 g DL-methionine each per day. Results showed that the infusoria count per one cu.cm of rumen content in lactating cows that had been given methionine at the rate of 30 g daily was 137013, while in the control animals it was 76431. The amount of lipid matter rose by 0.4 per cent in the controls in the course of the first 90 days of the lactation period. The milk yield of cows that received methionine also rose by 16 per cent, on an average, as calculated in terms of 4 per cent butterfat content for 24-hour period up to the third month of lactation. DL-methinionine in the diet of cows for the first months of lactation leads to grater amounts of milk of higher quality as well as to improving the health of the animals.
Insights
Supplementing dairy cows with DL-methionine daily increased milk yield and quality. This dietary addition also improved rumen health and overall animal well-being during early lactation.
Area of Science:
- Animal Science
- Dairy Nutrition
- Rumen Microbiology
Background:
- Methionine is an essential amino acid crucial for protein synthesis and metabolic functions in ruminants.
- Optimizing dairy cow nutrition is vital for maximizing milk production and maintaining animal health.
- Rumen microbial populations play a key role in nutrient digestion and overall gut health.
Purpose of the Study:
- To investigate the effects of DL-methionine supplementation on milk yield, milk quality, and rumen microbial populations in lactating dairy cows.
- To assess the impact of DL-methionine on lipid matter content and animal health during the early lactation period.
Main Methods:
- A trial involving 240 lactating dairy cows was conducted.
- Cows were divided into treatment and control groups, with the treatment group receiving 30 g of DL-methionine daily.
- Rumen content analysis was performed to quantify infusoria counts, and milk yield and composition were monitored.
Main Results:
- DL-methionine supplementation significantly increased infusoria count in rumen content (137,013 vs. 76,431 per cu.cm).
- Milk yield increased by an average of 16% (4% butterfat corrected) in cows receiving DL-methionine.
- While lipid matter increased by 0.4% in controls, DL-methionine improved milk quality and animal health indicators.
Conclusions:
- DL-methionine supplementation positively influences rumen microbial activity and enhances milk production in early-lactation dairy cows.
- Dietary DL-methionine contributes to improved milk quality and better overall animal health, supporting efficient dairy farming practices.