NUTRITIONAL EVALUATION OF SOME PROBIOTICS ON THE BIOLOGICAL PERFORMANCE OF BROILER CHICKEN UNDER VARIED STRESS CONDITIONS.
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Date
2009-10-16
Authors
Katoch, Shivani
Journal Title
Journal ISSN
Volume Title
Publisher
CSKHPKV, Palampur
Abstract
ABSTRACT
Use of antibiotic growth promoter feed additives for animal production has been
prohibited in most of the developed countries. Therefore, in the post antibiotics ban era,
there is a need to look for alternatives, which can safely and efficiently replace antibiotics
as growth promoters in poultry. The broad objective of the experiments were to determine
the effect on biological performance of broiler birds offered diets containing low density
protein, calcium and phosphorus by supplementation of direct fed microbial (DFM)/
probiotics isolated from leopard feces both under normal and stressful management
conditions. After, isolation, purification and culturing of direct fed microbial from leopard
feces procured from Gopalpur Wildlife natural Park – Palampur, the microbes/ DFM
(Probiotic) namely Lactobacillus and Streptococcus were offered in low density nutrient
viz. protein, calcium and phosphorus, formulated diets to broiler birds in sequentially
conducted trials of 3 batches from 1 to 42 days of age under varied management protocols
devised. It was found that that DFM supplemented broiler birds offered experimental
formulated nutrient (Ca and P) deficient diet reared as per standard and poor management
protocol exhibited higher growth and biological performance viz. low cholesterol, higher
dressing percentage and low mortality by maintaining a higher count of beneficial
microflora in the gastrointestinal tract and increase in nutrient utilization (Ca and P)
through improved intestinal enzyme activities and nutrient availability. Effect of isolated
DFM/probiotic was more pronounced when the birds were offered mineral (Ca and P)
deficient (10 and 20%) diet Similarly supplementation of isolated DFM to broiler birds
offered experimental formulated protein deficient diet could not overcome stress because
of multiple managemental stress factors leading to poor colonization and growth and thus
could not exert competitive exclusion vital to over come stress. Further, it was found that
isolated DFM/Probiotics did not support the broiler birds to grow to its full genetic
potential when challenged with multiple nutritional and management stress factors. At the
farmer level supplementation of isolated DFM to the broiler birds significantly (P<0.05)
improved the feed conversion ration and exhibited numerically higher gain in weight.
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