Effect of feeding complete ration vis-a-vis conventional ration on nutrient utilization and rumen metabolism in crossbred cattle

Gupta, R.B.; Tiwari, D.P.; Anil Kumar

Indian Journal of Animal Sciences 76(1): 55-60


ISSN/ISBN: 0367-8318
Accession: 004420105

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Rumen fistulated male crossbred cattle (3), 2 to 2.5 years old (average body weight of 325 kg) were fed concentrate mixture, wheat straw and green berseem separately (conventional ration, treatment 1), uniformly blended concentrate mixture and wheat straw (complete ration, treatment 2) and uniformly blended concentrate mixture, wheat straw and green berseem (complete ration, treatment 3) in a 3x3 latin square switch-over design. The rations were formulated so as to support for maintenance and 500 g gain. There was no significant difference in the daily dry matter, total digestible nutrients (TDN) and digestible crude protein (DCP) intake per kg metabolic body size among the 3 treatment groups. The digestibility coefficient values for dry matter, organic matter and crude fibre in treatment 3 were significantly higher than that in treatment 2. The total nitrogen, TCA - precipitable protein nitrogen and non-protein nitrogen concentration in strained rumen liquor (SRL) of animals increased after feeding and the peak was observed at 2 to 4 h post-feeding in all the treatments, but the mean values did not differ significantly among different treatment groups. The mean values of ammonia nitrogen and total volatile fatty acids (TVFA) concentration in SRL of animals in treatment 1 and 3 in which green berseem was supplemented were comparable and were significantly higher than that in treatment 2 in which complete feed was prepared without green berseem. The activity of ruminal enzymes, viz. alpha -amylase, carboxymethyl cellulase, xylanase, alpha -glucosidase, beta -glucosidase and beta -xylosidase was highest in particulate material followed by extra cellular and cellular fraction of SRL. The maximum activity of most of the enzymes was at 2 h post-feeding. The mean activity of alpha -amylase, carboxymethyl cellulase and beta -glucosidase was significantly higher in treatment 3 than that in treatments 1 and 2. Whereas, the mean activity of xylanase, alpha -glucosidase, beta -glucosidase and beta -xylosidase in SRL was significantly higher in treatments 2 and 3 than that in treatment 1. The results revealed that the activities of different ruminal enzymes responsible for fibre degradation were higher in animals fed complete ration as compared to animals fed conventional ration and also due to supplementation of green fodder. The change in biochemical parameters and more nutrients digestibility indicated improved utilization with complete feeding system over conventional feeding system.