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»
Production traits and indices of intermediary metabolism in Kholmogor bulls during intensive growing and fattening
Galochkina V.P., Agafonova A.V., Obvintseva O.V., Galochkin V.A.
Institute of Animal Physiology, Biochemistry and Nutrition, Borovsk Kaluga oblast,
Russian Federation
- Номер: No 2
- Страницы: 60-73
Журнал: Problemy biologii productivnykh zhivotnykh - Problems of Productive Animal Biology
Аннотация:
ABSTRACT. The aim of the work was to study the productive traits and parameters of metabolism in Kholmogor bulls in the age period from 8 to 12 months in conditions of high-concentration feeding. The experiment was carried out on two groups of bulls, by 5 bulls each. In two experimental periods lasting 1 month each, soybean meal supplements was administered in a balanced diet as a source of low degradable protein, in group I in the amount of 500 g, in group II − 250 g, in 2nd period 600 and 300 g, respectively. Feeding of mixed fodder increased from 4 kg in the preliminary and 1st trial periods to 5 kg in the 2nd trial period. To characterize the state of intermediary metabolism, in plasma taken before feeding, after 1 and 3 hours after feeding were determined the biochemical parameters: activity of piruvatcarboxylase, lactate dehydrogenase, five dehydrogenases of the Krebs cycle, and isocitrate malatsyntase, the concentration of glucose, amino nitrogen, total protein; the quantity of urea and creatinine in daily urine was determined.
In comparison with group II fed a smaller amount of soybean meal, the group I showed a greater effect in live weight gain (by 4%), carcass mass (by 8%), meat yield (by 17%), and meat quality indicators with an average daily live weight gain 1250 g for age period from 10 to 12 months and maximum daily live weight gain 1530 g in the age interval 10-11 months.The results of studying metabolic parameters showed that in animals of the experimental group in comparison with the control, the amino acids originating from the gastrointestinal tract, mainly used for the biosynthesis of muscle proteins, and to a lesser extent as an energy source. On the other hand, the data for the study of postprandial dynamics of activity of enzymes involved in the metabolism of pyruvate indicate the existence of circadian rhythm periods with the energy deficit in bulls of the experimental group. According to the study of blood biochemical parameters dynamics (the activity of enzymes, total protein, alpha-amino nitrogen, glucose, etc. in blood plasma, taken before feeding, after 1 and 3 h after feeding) can to a certain extent to estimate the direction of the shifts in the experimental and control groups with respect to the processes intermediary metabolism.
Литература:
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