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Journal of Livestock Science and Technology، جلد ۵، شماره ۲، صفحات ۱-۹
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عنوان انگلیسی Effects of a nanostructure of phytic acid absorber on the performance and protein digestibility in laying hens
چکیده انگلیسی مقاله A ten-week experiment was conducted to study the effect of a nanostructure of phytic acid absorber (NPAA) on the performance and protein digestibility in laying hens. A total of 100 Bovans laying hens were randomly assigned to 5 treatments, with 4 replicates, 5 hens each. The experiment was a completely randomized design with 5 levels of NPAA; including zero (T1, as a basal diet (BD)); T2 (BD+ 0.5% NPAA); T3 (BD + 0.25% NPAA); T4 (BD + 0.0625% NPAA) and T5 (BD + 0.03125% NPAA of total P) in diet. Water and feed were offered ad libitum. Inclusion of NPAA to the diet had significant effects (P< 0.05) on egg production (%) at 25 weeks of age and over the whole experiment. Dietary treatments significantly affected the egg weight (P< 0.001) at 29th weeks of age, and hens receiving T5 produced heavier eggs compared to T1, T2 and T3 treatments. NPAA also affected (P< 0.05) the egg mass and feed conversion ratio (FCR) at weeks 29 and 30. Egg shell weight was significantly (P< 0.05) affected at 29th week of age; however, dietary treatments had no effect on the relative egg shell thickness. Egg shell phosphorus and calcium contents were increased by 14.6 and 14.2% respectively at 29th  week of age in T5 compared to the control.  At 33rd week of age, hens in T4 group had significantly higher protein digestibility than T1 birds (P< 0.05). It was concluded that inclusion of NPAA to the diet at the level of 0.0625%, may reduce the anti-nutritional effects of phytic acid and improve production performance and protein digestibility in laying hens.  
کلیدواژه‌های انگلیسی مقاله egg production, birds, phytate phosphorus, egg shell, bovans
نویسندگان مقاله s قاسمی نژاد |
department of animal sciences, faculty of agriculture, university of jiroft, jiroft, iran.
سازمان اصلی تایید شده: دانشگاه جیرفت (Jiroft university)

n ضیایی |
department of animal sciences, faculty of agriculture, university of jiroft, jiroft, iran.
سازمان اصلی تایید شده: دانشگاه جیرفت (Jiroft university)

m رنجبر |
department of chemistry, faculty of sciences, shahid bahonar university of kerman, kerman, iran.
سازمان اصلی تایید شده: دانشگاه شهید باهنر (Shahid bahonar university)

s تشرفی |
natural resource and agricultural research and education center of kerman, kerman, iran.

نشانی اینترنتی http://lst.uk.ac.ir/article_1869_d3a64837fa3a1e49ac9d4f0642a99c90.pdf
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