Microbial activity in the rumen of early weaned buffalo calves in response to some nutritional additives

Allam, A.M.A.; El Shazly, K.; Barhami, B.E.A.; Abdel All, M.A.M.

Alexandria Journal of Agricultural Research 44(2): 57-66


ISSN/ISBN: 0044-7250
Accession: 003498401

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The effect of supplementing a cooked starter meal offered to early weaned buffalo calves with coated amino acids only or in combination with emulsified or saponified fats on some rumen microbial activities was investigated. Three male rumen-fistulated buffalo calves under the early weaning system were used. They were offered the following additives in sequence: starter mixture from 61 to 74 days of age (control); from 75 to 88 days of age lysine (11.5 g) and methionine (3.5 g) were added to the starter meal (treatment 2); from 89 to 102 days of age, 4% emulsified fat was added to the amino acids (treatment 3) and from 103 to 120 days of age saponified fat replaced emulsified fat (treatment 4). In all treatments, good quality hay was offered. Rumen samples were obtained at 4 different times. The average estimates of the 3 animals were used as a single result for each parameter. The parameters measured were rumen pH, volatile fatty acid (VFA) and NH3-N concentrations and rates of production, rumen liquid volume and rate of outflow, and the daily microbial cell yield. Rumen pH increased slightly in response to amino acid and fat supplementation. VFA and its rate of production behaved in a similar manner. NH3-N concentration and its rate of production decreased progressively with addition of amino acids, emulsified fat and saponified fat. Rumen liquid volume did not show a constant trend; rate of liquid outflow increased slightly in response to treatment with amino acids and emulsified fat and to a greater extent as saponified fat was added.