Performance of Broiler Chicks Affected by Dietary Supplementation With Commercial Enzymes or Probiotics

Abstract

The present study was carried out to investigate the effect of using graded levels of Bio-Nutra 200 and Natuzyme with plant protein diets on the performance of broiler chicks. three dietary levels (0.25, 0.50 and 0.75g/kg) of either Bio-Nutra 200 (probiotic) or Natuzyme (enzyme preparation) in addition to the control without supplementation were used. Therefore, seven experimental diets were formulated to have similar crude protein and metabolizable energy contents during both starter and grower periods. Three hundred thirty six one-day-old unsexed Hubbard broilers were randomly distributed to seven equal experimental groups. The chicks were fed the experimental starter diets from one day to 21 days of age and switched to feeding the experimental grower diets from 22 to 42 days of age. All chicks were managed similarly and had free access to feed and water during both the starter and grower periods. The criteria of response were live body weight, weight gain, feed intake, feed conversion, economical efficiency of growth, carcass traits, nutrient digestibility [dry matter (DM), organic matter (OM), crude protein (CP), ether extract (EE), crude fiber (CF) and nitrogen-free extract (NFE), and ash retention], some blood plasma parameters [total protein, albumin and cholesterol , and activity of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in blood plasma]. The obtained results for the whole experimental period could be summarized as follows: Birds fed either the probiotics-or enzymes-supplemented diets had significantly higher means of final live body weight, weight gain, feed conversion, economic efficiency of growth, nutrient digestibility (i.e. DM, OM and CF), with insignificant differences among them, compared with their control counterparts. In general, birds fed either probiotics-or enzymes supplemented diets achieved significantly higher means of most carcass traits and some blood parameters compared with birds fed control diets; however, AST and ALT were negatively affected. The other criteria were not affected by level of both feed additives. In conclusion, the current study may indicate beneficial effects of adding probiotics and exogenous enzymes (particularly with the level of 0.075 g/ kg) to broiler diets.

Biochemical Profile, Oxidative Status and Immunological Response of Broiler Chicks Fed Commercial Natural Growth Promoters-Supplemented Diets القیاسات البیوکیمیائیة والحالة التأکسدیة والاستجابة المناعیة لکتاکیت التسمین المغذاه على علائق مدعمة بمحفزات النمو الطبیعیة التجاریة

“…In the present study, Dietary supplementation of deferent levels of commercial probiotics (Provilcc) had a significant effect on carcass yield, and weight of front parts (FP), hind parts (HP), liver and Gizzard compared with the control once (Table 3). Similarly, explained by Novak et al (2011) and Ismail et al, (2011) who indicated significantly better carcass yield, and breast and thigh meat weights. However, contrasting studies were uncovered that dietary probiotic botched to increase carcass yield of chicks fed probiotic-added diets (Pelicano et al, 2005;Karaoglu and Durdag, 2005).…”

“…Probiotics is a live microbile feed addition which benefits the host poultry by humanizing it's intestinal tract balance (Ismail et al,. 2011 andAbo El-Maaty et al, 2017).…”

Effect of Commercial Enzymes And\or Mannan Oligosaccharide Suplementation on Productive Performance, Nutritive Values and Metabolic Indices of Broiler Chicks

“…Results obtained (Table 8) revealed that significant differences in Hct, TP, Alb., Hb, lipase, amylase and TAC values between supplemental groups and control. In the line of our study, Ismail et al (2011) revealed that Hubbard broiler chicks fed either feed additives or Natuzyme® supplemented diets achieved significantly higher total protein and albumin levels which may be attributed to the favorable environment in the intestinal tract created by the feeding of these additives, in addition it might have helped to digest and absorb more nitrogen (Mohan et al, 1995 andPanda et al, 2006). Hemoglobin values increased in treated groups (four and three) than control group, this result may be due to addition of these additives might have stimulated iron absorption and activity of the hematopoietic organs and causes erythropoiesis, also high environmental temperature may have influenced the hematological parameters (Hasan et al, 2015).…”