Bìol. Tvarin, 2016, vol. 18, no. 1, pp. 99–104

CONTENT OF AMINO ACIDS IN THE RUMEN OF COWS UNDER CONDITIONS OF FEEDING HIGH-PROTEIN EXTRUDED SUPPLEMENTS

I. V. Nevostruyeva

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Institute of Animal Biology NAAS,
38 V. Stus str, Lviv 79034, Ukraine

Increase in the quantity of undegradable in the rumen proteins in the diet of cows of experimental group caused by extruding of high-protein supplements was accompanied by the change of total and free amino acids in ruminal contents. The amount of total amino acids in the rumen of cows of experimental group during all experiments was greater by 9.8–10.8 %, which was mostly caused by the increase of the amount of essential amino acids (Р<0.05–0.01). Irrespective of the source of protected proteins during all experiments in the rumen of cows in experimental group, the increase of the concentration of lysine, arginine, methionine, proline and cystine was determined (Р<0.05–0.01), while feeding rapeseed and soybean meal — increase of the concentration of valine, threonine and phenylalanine as well, and while feeding sunflower cake — increase of the concentration of leucine. Among nonessential amino acids in the rumen of cows in the experimental groups, the amount of asparaginic acid, serine, and alanine was increasing (Р<0.05–0.01).

As opposed to total amino acids, concentration of free amino acids in the ruminal contents of cows of experimental group was smaller by 14.8–18.0 % (Р<0.05) compared to animals of control group that was mainly caused by decrease of the concentration of essential amino acids — histidine, methionine, and leucine. Considering nonessential amino acids, at the same time, concentration of glutaminic acid and asparaginic acid, glycine, proline, serine, and tyrosine has decreased (Р<0.05–0.01). These data are the evidence of decrease of degradability of essential amino acids and of increase of their intake into bowel, and uptake by cows.

Keywords: COWS, RUMEN CONTENTS, AMINO ACIDS, RAPESEED MEAL, SOYBEAN MEAL, SUNFLOWER CAKE, EXTRUDED FODDER, LACTATION

1. Tsyupko V. V., Zlobina G. S., Vasilevskiy M. V. Rationing protein feeding cattle. Stock-raising of Ukraine, 1996, 10, pp. 26–27. (in Ukrainian)
2. Dinn N. E., Shelford J. A., Fisher L. J. Use of Сornell net carbohydrate and protein system and rumen-protected lysine and methionine to reduce nitrogen excretion from lactating dairy cows. Journal of Dairy Science, 1998, 81, pp. 229–237.
3. Huhtanen P. A review of the 2001 dairy cattle NRC protein and amino acid model — A European perspective. Journal of Dairy Science, 2005, 88, pp. 107–130.
4. INRA. Ruminant nutrition. Recommended allowances and feed tables. R. Jarrige, ed. John Libbey Eurotext, London, Paris, 1989.
5. Nutrient Requirements of Dairy Cattle: 6th Revised Edition.Washington, DC, USA, National Academy Press, 1989, 168 p.
6. Nutrient Requirements of Dairy Cattle: 7th Revised Edition. Washington, DC, USA, National Academy Press, 2001, 408 p.
7. Metcalf J. A., Wray-Cahen D., Chettle E. E., Sutton J. D., Beever D. E., Crompton L. A., MacRae J. C., Bequette B. J., Backwell F. R. The effect of dietary crude protein asprotected soybean meal on mammary metabolism in the lactating dairy cow. Journal of Dairy Science, 1996, 79, pp. 603–611. https://doi.org/10.3168/jds.S0022-0302(96)76405-6
8. Aliev A. A. Lipid exchange and productivity of ruminant zoons. Moscow, Kolos, 1980, 382 p. (in Russian)
9. Grigorev N. G, Volkov N. P, Vorobev E. S. Biological full value of forage. Moscow, Agropromizdat. 1989, 287 p. (in Russian)
10. Vantuh A. E. Milk performance and the level of some metabolities in blood and rumen liquid of cows using soybean and canola meal in ration. Avtoref. cand. agr. sci. diss. Lviv, Institute of animal biology NAAS, 2003, 22 p. (in Ukrainian)
11. Norms and rations of feeding of agricultural zoons: a handbook, ed. by A. P. Kalashnikov. Moscow, Agropromizdat, 1985, 352 p. (in Russian)
12. Norms and rations of feeding of agricultural zoons: a handbook. Ch. 1. Cattle. Ed. by A. P. Kalashnikova. Moscow, Znanie, 1995, 400 p. (in Russian)
13. Norms and rations of feeding of agricultural zoons: a handbook. 3rd redesigned and enlarged ed., ed. by A. P. Kalashnikov. Moscow, 2003. 456 p. (in Russian)

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