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Open Access
Copyright: The authors. This article is an open access
article licensed under the terms of the Creative Commons Attribution License
(http://creativecommons.org/licenses/by/2.0) which permits unrestricted use,
distribution and reproduction in any medium, provided the work is properly
cited.
Research (Published
online : 14-08-2013)
12. Synergistic effect of non starch polysaccharide
enzymes, synbiotics and phytase on performance, nutrient utilization and gut
health in broilers fed with sub-optimal energy diets - J. Narasimha,
D. Nagalakshmi, Y. Ramana Reddy and S. T. Viroji Rao
Veterinary World, 6(10): 754-760
doi:
10.14202/vetworld.2013.754-760
Abstract
Aim:
In view of the ban on antibiotic growth promoters (AGPs), an
attempt was made to explore the possibility of harnessing
synergistic effect of non starch polysaccharide (NSP) enzymes,
synbiotics and phytase on performance, nutrient retention, gut
health and histology of broilers fed with corn-soybean meal based
low calorie diets.
Materials and Methods: A total of 150 a day-old broiler chicks
were weighed, wing banded and randomly distributed into five
experimental groups, six replicates per group and five birds per
replicate and raised in electrically heated battery brooders.
Evaluated the synergistic effect of the NSP enzymes, synbiotics
and phytase alone or in combination, supplemented to cornsoybean
meal based broiler diet, low in energy concentration (Basal diet
(BD)) (-225 kcal lower metabolizable energy than standard diet
(SD), on performance, nutrient retention, carcass traits, gut
conditions and cost per kg live weight gain.
Results: The body weight gain in broiler chicks fed with BD
supplemented with NSP enzymes, synbiotics and phytase was
significantly (P<0.01) higher. Supplementation of NSP enzymes,
synbiotics and phytase alone or in combination had significant
effect on feed intake. Synergistic effect of NSP enzyme,
synbiotics and phytase was observed on overall feed conversion
ratio (1.86), which improved (P<0.05) in comparison to BD (2.06)
and SD (2.02), respectively. The supplementation of NSP enzymes,
synbiotics and phytase to BD improved (P<0.05) utilization of
organic matter (OM), crude protein (CP), nitrogen free extract (NFE),
gross energy (GE), phosphorus and the tibia ash compared to BD,
whereas no effect on retention of DM and CF was observed.
Intestinal viscosity and E. coli count significantly
(P<0.01) reduced with addition of NSP enzymes, synbiotics plus
phytase or combination of all. The supplementation of NSP enzymes,
synbiotics plus phytase had no effect on intestinal histology. The
cost of feeding was lower (P<0.01) in BD. Addition of these feed
additives to BD did not increase the feeding cost and was
comparable to unsupplemented ones and lower (P<0.01) than SD.
Similarly, the feed cost
per kg
live weight gain during various phases of broiler production was
reduced (P<0.01) due to supplementation of all the feed additives
compared to SD and BD.
Conclusions: It can be concluded from the above experiment
that supplementing sub-optimal energy diets with NSP enzymes along
with synbiotics and phytase improved body weight gain, FCR,
nutrient retention, tibia ash and reduced the cost of production
considerably.
Keywords: gut health, histology, live weight gain, NSP
enzymes, nutrient retention, synbiotics, phytase,
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