Browsing by Author "Mirza, M. W."

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Dietary Xylanase Increases Hepatic Vitamin E Concentration of Chickens Fed Wheat Based Diet
(Kielanowski inst Animal Physiology Nutrition, 2015) Pirgozliev, V.; Karadas, F.; Rose, S. P.; Beccaccia, A.; Mirza, M. W.; Amerah, A. M.
The study examined the effect of xylanase supplementation on apparent metabolizable energy (AME) and hepatic vitamin E and carotenoids in broiler chickens fed wheat based diets. A total of one hundred forty four male Ross 308 chickens were used in this study. Birds were randomly assigned to 3 dietary treatments (8 cages per treatment of 6 male broilers each) for 14 days from 7 to 21 day old. The control treatment was based on wheat-soyabean meal and was either unsupplemented or supplemented with either 1000 or 2000 xylanase units per kg diet. Orthogonal polynomial contrasts were used to test linear response to dietary xylanase activity. There was a positive linear relationship (P < 0.05) between dietary AME and doses of supplementary xylanase. A linear relationship (P < 0.05) was also observed between dosage of xylanase supplementation and hepatic vitamin E concentration and retention. In conclusion, xylanase supplementation improved dietary AME and increased hepatic vitamin E concentration which may have positive effects on the antioxidative status of the birds.
The Temperature of Storage of a Batch of Wheat Distillers Dried Grains With Solubles Samples on Their Nutritive Value for Broilers
(Taylor & Francis Ltd, 2018) Whiting, I.; Pirgozliev, V.; Rose, S. P.; Karadas, F.; Mirza, M. W.; Sharpe, A.
1. A batch of wheat distillers dried grains with solubles (DDGS) was obtained immediately after production and was separated into 5 equal parts and placed in woven polypropylene sacks. The samples were stored under 5 different temperature conditions for 1 year as follows: kept at a constant -20 degrees C; kept at -20 degrees C for 24h period and after that kept at a constant +4 degrees C; kept at a constant +4 degrees C only; kept at a constant +15 degrees C; stored at ambient temperature (range of weekly mean temperatures was from +4 to +22 degrees C).2. Each of the 5 wheat DDGS samples was included (200g/kg) in a nutritionally complete diet and fed to broiler chickens from 7 to 21 d of age. The chemical composition of the DDGS samples was determined at the beginning and at the end of the 1-year storage period.3. The nitrogen corrected apparent metabolisable energy (AMEn) and the nutrient availability of each sample was measured using a total collection technique. The growth performance of birds was also determined.4. The DDGS samples kept at a constant -20 degrees C had higher dry matter, lower oxidation value and lower antioxidant contents. The DDGS sample that was stored at ambient temperatures had a higher AMEn than the rest of the DDGS samples.5. The results of this experiment have shown that there can be changes in the AMEn of wheat DDGS during storage at ambient temperatures. In general, there were no serious effects of storage of DDGS on its feeding value to broiler chickens.