Всероссийский научно-исследовательский институт физиологии, биохимии и питания животных – филиал Федерального государственного бюджетного научного учреждения «Федеральный научный центр животноводства – ВИЖ имени академика Л.К. Эрнста»
Effect of probiotic preparation of recombinant lactobacilli expressing growth hormone releasing factor on milk productivity in goats and cows
- Номер: 1
- Год: 2013
- Страницы: 30-38
Журнал: Problems of Productive Animal Biology
Аннотация:
The object was to study the action of recombinant probiotic strain of lactobacilli with growth hormone releasing factor gene on milk productivity in goats and cows. The trial I was performed on goats, preparation was given to 5 goats on 3rd mo of lactation daily during 6 weeks at the dose 25×109 CFU, 5 goats were control. In the trial II, recombinant probiotic was given to 8 cows on 4-5 mo of lactation daily during 2 mo at the dose 26×109 CFU (group I), non-recombinant strain was given to 8 cows at the same dose (group II), 8 cows were control group. In all trials, recombinant preparation stimulated milk formation and ameliorated feed efficiency. In the trial III, recombinant probiotic was given to 10 cows on 3-4 mo of lactation at the dose of 200×109 CFU (group I, n=10) or 1000×109 CFU (group II, n=10), 10 cows were control group. In goats received preparation, daily milk yield in the course of last 2-3 weeks was higher vs control by 26.5% (P<0.05). In the trial II in the course of last 5 weeks, milk yield in group I was higher by 10% (P< 0,05) vs group II and by 8,1% (P< 0,05) vs group III. In the trial III the daily milk yield in group I and II was higher by 6,3 and 13.2% vs control. In all trials, recombinant probiotic did not occur influence on milk fat and protein content. The data obtained suggest that the use of recombinant probiotics expressing somatoliberin may be a real alternative to methods of stimulating milk productivity based on the using injections of recombinant STH.
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