Вплив протеїнового забезпечення тварин на рубцеву ферментацію та продуктивність

Abstract

В статті наведено данні щодо впливу зниження протеїнової забезпеченості організму корів на рубцеву ферментацію, забезпеченість тканин молочної залози попередниками для синтезу складових компонентів молока та продуктивність дослідних тварин. При зниженому забезпеченні корів протеїном жиро – і лактозосинтезуюча функція тканин молочної залози корів дослідної групи були значно нижче. В молоці корів даної групи вміст жиру і лактози були впродовж усієї лактації нижче на 0,03 і 0,17 % у порівняні з контрольною групою. Тваринами даної групи за весь період лактації с молоком виділено на 6,1 кг жиру менше, ніж коровами контрольної групи.

In this article is talking about the effect of lower protein, cows rumen fermentation, and the availability of breast tissue. Ensuring the need in milk and dairy products poses a number of veterinary science scientific tasks. This tasks require thorough basic research to study the physiological and biochemical characteristics in high lactopoesis cows and cows in early age. It concerns the identification of critical stages in the functional activity of the mammary gland of cows. Also it is the basis for the development based methods mammary gland firstborn cows. It will increase secretory function in the next lactation. In cows rumen total weight of microorganisms appeared at 1.17 times lower than in controls. Also the total number of ciliates was higher at 1.08 times. Adsorption volatile fatty acid during the day significantly increased in the third survey and decreased during the fourth period. Over the stages of lactation, the lactation of the cows absorbed the volatile fatty acid then in the control group animals. Lactosynthesis and fatsynthesis tissue cows of the experimental group were significantly lower when they gains lower protein. In this group of cows, milk fat and lactose were lower by 0.03 and 0.17% compared with the control group cows. In this group milk allocated with 6.1 kg of fat and it was less than the control group of cows for the whole lactation. The intensity of the absorption of metabolites rumen mammary fermentation was determined by the dynamics of arteriovenous (AV) difference. In the blood samples was determined volatile fatty acid concentration of handset Markgam. In samples of rumen contents were determined: amilolitical activity rumen bacteria - that were find by Smith and Roy in modifications in M.F. Kulik (1970), proteolitical activity were find by Petrova I.S. and Vnyutsnayte M.M. (1966), rumen cellulolitical activity of bacteria in a vacuum incubator for three days by Palfiy F.Y, Yurchuk E.F. (1968). In the first lactation period volatile fatty acid content increased in arterial blood within 6 hours after feeding. Overall, the average content volatile fatty acid in arterial blood of animals was a 1.22 times higher than the initial level (p <0.01). In drain of mammary gland, blood content volatile fatty acid increased during the third and fourth test. Also during the second test it remained at the level of the indicator at baseline test. Level adsorption volatile fatty acid mammary tissue cows of research group was lower than in controls (p <0.01).