Hameed A.,Poultry Production |
Ahmad M.,Poultry Production
Pakistan Journal of Life and Social Sciences | Year: 2015
A study was conducted by using 1-day-old mixed sex (Ross 308) broilers (n=240) to test the hypothesis that a coarsely ground diet increased growth performance of broilers fed on a low digestible protein source. A high digestible soybean meal was gradually replaced by a poor digestible diet based on rapeseed meal (RSM) in three steps (RSM-0%, RSM-50%, and RSM-100%). Two diet structures (fine and coarse), as an extra factor, were investigated in a factorial design with six dietary treatments. The results indicated that an increase in indigestible dietary protein decreased feed intake (FI) (P=0.005), BW gain (P=0.006) and feed conversion ratio (FCR) (P=0.023). This increase in dietary indigestible protein contents by an increase in the indigestible protein level, from RSM-0% to RSM-100%, resulted in decreased (P=0.023) villi heights (1677 vs. 1462 μm); whereas, crypt depths increased (P=0.013; 227vs. 282μm). A coarse diet improved FI (P=0.006), BW gain (P=0.014) and FCR (P=0.009). Birds fed coarsely ground diets had about 12, 21 and 11% lower relative empty weights of the crop, proventriculus and jejunum, respectively. The gizzard weight was approximately 15% improved in coarsely ground diets fed birds compared with those fed the fine diets. Dietary coarseness resulted in approximately16% lower gizzard pH, 21% greater villi heights, 27% lower crypt depths, in comparison with broilers fed fine diets. In conclusion, irrespective of digestibility of the diet, coarse particles feeding improved the performance of broilers.
Ali S.,Poultry Production |
Mukhtar M.,Poultry Production |
Manzoor S.,Model Civil Veterinary Hospital |
Hssain Z.,Poultry Research Institute |
And 5 more authors.
Pakistan Journal of Nutrition | Year: 2014
Group A (control) chicks were placed on commercial feed, group B, C and D were offered feed supplemented with garlic, kalongi and turmeric @0.5 g/ Kg of feed, respectively. Overall weight gain during six weeks was highest (1476.60 g) in chicks of group C followed by those of group D (1340 g), B (1338.97 g) and A (1333.60 g), respectively. Overall feed consumption was apparently highest in chicks of group B (3110 g) followed by group C (3065 g), D (3053 g) and A (2708.33 g), respectively. Overall FCR during six weeks period was apparently best in group C (2.0) followed by group A (2.0), D (2.2) and B (2.3), respectively. Maximum value for antibody titer against ND was recorded in group C (1032), followed by group B (873.33), D (783.33) and group A (558.33), respectively. The maximum antibody titer against IBD was recorded in group C which was 1030 followed by group B (873.33), D (770) and group A (470), respectively. ANOVA on data of both diseases showed significant differences between groups with respect to antibody titre at 6 weeks. Maximum value for serum cholesterol was recorded in group A (134 mg/dL). Followed by group D (115.70 mg/dL), C (105 mg/dL) and group B (94.67 mg/dL), respectively. ANOVA on data showed significant differences between groups with respect to serum cholesterol at 6 weeks. Statistical analysis of data on various treatments revealed non-significant effect on weight gain but significant effect on feed consumption and FCR. Statistical analysis also revealed non-significant effect of treatments on the average value of dressing percentage, liver, heart, gizzard, spleen and pancreas weight but significant effect on intestinal weight, abdominal fat pad weight, antibody titre against ND and IBD and serum cholesterol level. Maximum profit was found in treatment C (Rs.30.57) followed by treatment D, B and A i.e., 23.02, 22.11 and 28.16 rupees, respectively. © Asian Network for Scientific Information, 2014.