No abstract

he present study was performed to investigate the influence of feeding diets contained three levels of yellow corn (YC) without or with enzymes and/or prebiotics on the nutrient digestibility and blood parameters of growing New Zealand White (NZW) rabbits. A feeding trial (3x4) with factorial arrangement of treatment was carried out. The chemical analyses for experimental diets and faces and blood constituents were run. One hundred and eight, 6 weeks old weaning NZW rabbits were used in this study. Rabbits were randomly distributed into 12 equal experimental groups; each contained three equal replicates. The digestibility coefficients of dry matter (DM), organic matter (OM), crude fiber (CF), ether extract (EE), nitrogen free extract (NFE), non-ditrgant fiber (NDF), ADF and hemicellulose were increased with feeding on 15 % YC diets than those of rabbits fed on 5 % or 10 % YC rations, but there was no significant effect of dietary treatments on DMI and CP digestibility. Rabbits fed enzyme-supplemented diets displayed significantly lower DM, OM, CF, EE, NFE, NDF, ADF and hemicellulose than those of other dietary treatments. There was no significant effect of these supplements on DMI (g/d) and CP digestibility, compared with the control diet (without supplements). The digestible DCP (%), TDN% and DEI (kcal/d) were significantly higher (P≤0.05) for animals fed diets containing 15 % YC than feeding on 5 or 10 % YC diets, while there were no significant effect on TDNI (g/d), CPI (g/d) and DEI (kcal/d). Rabbits fed the enzyme-supplemented diets exhibited significantly lower TDN (%) and DE (kcal/kg) than did those fed other experimental diets. Similarly, significantly lower means of DEI (kcal/d) were recorded by rabbits fed enzyme-or enzyme plus prebiotics-supplemented diets compared with other experimental groups of rabbits, but DCP % and CPI (g/d) were not affected. The plasma levels of triglycerides and total cholesterol were significantly lower for rabbits fed diets with 10 % or 15 % YC than those of rabbits fed the lowest level of YC,, while there was no significant effect on ALT, AST, total protein or urea concentration. Rabbits fed the diets fortified with enzymes plus prebiotics exhibited significantly lower (P≤0.05) levels of plasma urea and triglycerides and significantly higher cholesterol concentration than did the control group. In conclusion, using YC to partially replace wheat bran in growing rabbits diets had no negative effect on the nutritive value of diets. The nutritive value of the experimental diets for growing rabbits could increase by supplementing enzymes plus prebiotics. The present study showed that feeding growing rabbits on diets contained 10 % YC without supplements or feeding on diets contained 15 % YC with enzymes and prebiotics are effective for nutrient digestibility, nutritive value and health status of rabbits.

The current study was designed to evaluate the effect feeding weaning rabbits sugar beet tops (SBT) with prebiotic on digestibility of nutrients and caecal microbial activity, volatile fatty acids estimation and organs histology. Fifty four 6-week-old unsexed weaning NZW rabbits were randomly distributed in a factorial (3 × 2) design to six equal groups. Sugar beet tops (SBT) was used at levels 0.0, 20 or 30% of the diet instead of the percent of alfalfa hay in the control diet in presence of 1.0 g/kg diet or absence of prebiotic (Perfect). Digestibility coefficients of dry matter (DM), crude protein (CP), ether extract (EE) and NFE of 12-week old NZW rabbits were improved by feeding SBT-containing diets. Dietary SBT level had no significant effect on pH value, TVFA,s and NH 3 -N values for caecum content of 12 weeks old NZW rabbits, however, total bacteria, E. coli and lactobacillus counts were significantly affected. Feeding SBT-containing diets did not alter plasma concentrations of AST and ALT of 12-week-old rabbits. Dietary prebiotic had a positive effect on the digestibility coefficients of DM, OM, CP, EE, CF and NFE of growing rabbits. Added prebiotic had a positive effect on caecal fermentative activities and caecal microbial activity of growing rabbits. The pH value, ammonia-N level, total bacteria and lactobacillus counts of rabbits fed prebiotic-supplemented diets were significantly higher but E. coli count was reduced as compared to control ones. This study concluded that sugar beet tops can be safely used in rabbit diets up to 30% instead of alfalfa hay.

No abstract

The performance of hybrid chickens fed plant-protein diets was compared to those fed diets supplemented with Ziziphus, Jatropha, white berry, black berry and pomegranate leaves extracted meal at level of (0.5 g/kg) or Vit. E. Two hundred and forty, 2 weeks-old unsexed Arbor acres chicks were used. A total number of 30 chicks were allocated for each treatment, divided into 3 replicates (10 birds/each) and housed in broiler cages. The chicks were fed the experimental grower diets from 2 to 6 weeks of age during summer season. All chicks were managed in similar fashion and had free access to feed and water throughout grower period. Measurements include were growth performance, carcass quality, digestibility and some plasma constituents.Results obtained showed that: growth performance criteria were positively (P ≤ 0.05) affected by dietary supplementation with Ziziphus, Jatropha, white berry, black berry and pomegranate leaves extracted meal in the diet during the whole growing period. Digestible coefficients of CP, EE, NFE and ash retention were increased significantly (p ≤ 0.05) by dietary additions. Broilers fed the herb leaves extract-supplemented diet had significantly higher HDL, SOD, urea, ALT and creatinine levels than positive or negative control. This indicates better liver function as also appears from the normal architecture with a normal size central vein (CV) and several homogenous masses of liver cords with normal hepatocytes (h) and few fatty cirrhotic areas (f). It can be concluded that phytogenic extracted meals have a beneficial effect on growth performance and liver histology especially in summer season.

No abstract

The current experiment was directed to examine the beneficial impacts of dietary enrichment with commercial probiotics (Provilacc) on performance, Biochemical profile, oxidative status and Immunological response, antibody titers against avian flu virus (AFV) and Newcastle disease virus (NDV) in chickens. In this experiment, 200 day-old unsexed Hubbard broilers were randomly distributed to four equal experimental groups (0.0, 0.5, 0.75 and 1.0 g Provilacc /kg diet) , each of which include 5 equal replicates. High level of commercial natural growth promoters were (1.0 g/kg diet) had a positive effect on LBW, BWG and FCR whilst feed intake was slightly enhanced comparison with the control one. Also, Blood plasma concentrations of cholesterol (Chol), low density lipoprotein cholesterol (LDL) and high density lipoprotein cholesterol (HDL) had differed significantly between the control and provilacc-supplemented groups. Also, provilacc supplementation in the diet could improve thyroid function. In addition, supplementing provilacc had a significant positive effect on liver function (AST, ALT and AlkP), SOD, MDA and antibody titers against NDV and AFV. The outcome of the present work show that adding provilacc (commercial natural growth promoters) to diets of Hubbard chicks up to 1.0g/kg diet has a helpful effect on oxidative status and Immunological response, antibody titers against avian flu virus (AFV) and Newcastle disease virus (NDV) under normal conditions.