PECULIARITIES OF DIGESTIVE AND METABOLIC PROCESSES IN SHEEP WHEN USING DIFFERENT SOURCES OF PROTEIN NITROGEN

A. V. Mishurov, N. V. Bogolyubova, V. N. Romanov
L. K. Ernst All-Russian Research Institute of Animal Husbandry, pos. Dubrovitsy, 60, Podol’skii r-n, Moskovskaya obl., 142132, Russian Federation

Abstract. The influence of sources of protein nitrogen from linseed-cake (group I), carbamide (group II) and blood meal (group III) on ruminal digestion, nutrient digestibility and metabolism was studied. The experiment was carried out on three groups of sheep with ruminal fistula (live weight of 40–45 kg, age of 16–18 months), six heads in each group. It was added 12% of nitrogen sources of the total amount of crude protein in the diet. Sheep from group I ate 1115.34 g of dry matter, which was higher by 31.17 g and 7.05 g in comparison with the animals from groups II and III, respectively. The consumption of crude protein was higher in group III (133.29 g) by 3.4% compared to group I and by 2.5% in comparison with group II. The most intensive formation of ammonia in the rumen in three hours after feeding was in group II – 15.13 mg% versus 12.97 mg% in group I and 11.54 mg% in group III. Digestibility of nutrients in animals of group I was higher, relative to group II: dry matter (704.7 g) – by 31.17 g, organic matter (638.3 g) – by 43.0 g, protein (82.8 g) – by 1.0 g, fat (21.5 g) – by 3.0 g, fiber (113.3 g) – by 1.6 g, NFE (417.2 g) – by 11.9 g. Coefficients of digestibility were comparable with animals that were fed by blood meal. The nitrogen utilization factor was higher in the sheep from group I – 48.51%; it was higher by 4.7 and 1.5 absolute percentage than in groups II and III, respectively. Linseed-cake was the most favorable for the digestive and metabolic processes.

Keywords: ruminants; sheep; protein nitrogen; linseed-cake; carbamide; blood meal; ruminal digestion; digestibility; metabolism.

Author Details: A. V. Mishurov, Cand. Sc. (Agr.), senior research fellow (e-mail: Этот адрес электронной почты защищён от спам-ботов. У вас должен быть включен JavaScript для просмотра.); N. V. Bogolyubova, Cand. Sc. (Biol.), head of division V. N. Romanov, Cand. Sc. (Biol.), leading research fellow.

For citation: Mishurov A. V., Bogolyubova N. V., Romanov V. N. Peculiarities of Digestive and Metabolic Processes in Sheep when Using Different Sources of Protein Nitrogen. Dostizheniya nauki i tekhniki APK. 2018. Vol. 32. No. 8. Pp. 66–69 (in Russ.). DOI: 10.24411/0235-2451-2018-10818.