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Articles by Zaib Ur Rehman
Total Records ( 2 ) for Zaib Ur Rehman
  Zaib Ur Rehman , Tayyab Aziz , Shaukat Ali Bhatti , Gulraiz Ahmad , Jamil Kamran , Sajid Umar , Chunchun Meng and Chan Ding
  Objective: This experiment was conducted to assess the use of low energy diet which contains β-mannanase (Hemicell® HT) for its ability to improve the gross energy digestibility, dry matter digestibility and broiler performance. Methodology:About 301 days-old hubbard broiler male chicks were procured from local hatchery and 180 chicks with mean body weight of 40±2 g were selected and randomly assigned to one of three dietary treatment consisting of Standard Ration (SR), low energy ration (LE) and low energy diet supplemented with β-mannanase (LE+E) divided into 18 experimental units of 10 birds each. Results: Results demonstrated that LE+E diet improved (p<0.05) average body weight from 14-42 days and feed conversion ratio from 1-35 days. Different treatments did not affect the feed intake and mortality of the broilers. European production index was improved in LE+E fed birds as compared to the LE. Slaughter parameters including dressing, carcass, thigh, abdominal fat and gizzard percentage were not affacted by the dietary treatments. However, breast meat percentage was higher in SR fed broilers. The dietary treatments did not affect dry matter and gross energy digestibility of broiler. Conclusion: The study was completed, concluding that β-mannanase supplementation in low energy diet had beneficial effect on the body weight, feed conversion ratio, European production index and had no effect on the dry matter and gross energy digestibility.
  Zaib Ur Rehman , Ahsan Ul Haq , Naasra Akram , Mohamed E. Abd El-Hack , Muhammad Saeed , Shahid Ur Rehman , Chunchun Meng , Mahmoud Alagawany , Maryam Sayab , Kuldeep Dhama and Chan Ding
  Objective: The present study was performed to determine the influence of dietary Acetic Acid (AA) supplementation on growth performance, intestinal histomorphology, blood hematology and serum constituents of broilers. Methodology: A total 200 chicks were randomly divided into five experimental groups with four replicates each (10 chicks/replicate) in a complete randomized design experiment. Treatments were as follow: (AA0: control, AA1: basal diet+0.1% acetic acid kg–1, AA2: basal diet+0.2% acetic acid kg–1 and AA3: basal diet+0.3% acetic acid kg–1). Results: The results showed that AA supplementation improved weight gain (p<0.001) and feed conversion ratio (p<0.001). Generally, acetic acid supplementation at 0.3% level improved bird’s performance during 2-6 weeks of age. Increased intestinal length and higher intestinal weight were recorded in AA treated birds. Significant reduction in pH of proventriculus and ventriculus (p<0.01) was observed with in dose related manner. No significant effects were observed on dressing percentage. Histological observations revealed that intestinal morphology professed positive effects under AA treatment. Furthermore, the effect of dietary AA supplementation was significant (p<0.05) only on lymphocytes count and heterophil/lymphocyte ratio. It is obvious that blood of birds fed AA3 diet had the highest concentration of calcium, phosphorous, total protein and globulin comparing with the control diet and other levels of AA. The best results of all parameters were observed in AA3. Conclusion: Based on the results, it could be concluded that AA supplementations in feed employs positive effect on performance and intestinal histomorphology of broilers.
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