Babak Esfandyari; Mojtaba Zaghari; Shirin Honarbakhsh; Mahmood Shivazad
Abstract
This study was conducted to investigate the effect of Bacillus subtilis and Licheni formis on broiler breeder performance and gastrointestinal health of their progenies. A total of 336 broiler breeder hens (Cobb 500) from 22 to 32 weeks of age were used in a completely randomized design of 2 × ...
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This study was conducted to investigate the effect of Bacillus subtilis and Licheni formis on broiler breeder performance and gastrointestinal health of their progenies. A total of 336 broiler breeder hens (Cobb 500) from 22 to 32 weeks of age were used in a completely randomized design of 2 × 2 factorial arrangement with four treatments, each with seven replicates. Dietary treatments included: 1) basal diet without probiotic and without Salmonella enteritidis inclusion; 2) basal diet without probiotic and oral inclusion of 1×106 cfu/bird and 1×108 cfu/bird Salmonella enteritidis in 26 and 30 weeks of ege, respectively; 3) basal diet containing 0.4 gr/kg probiotic and without Salmonella enteritidis inclusion; 4) basal diet containing 0.4 gr/kg probiotic and oral inclusion of 1×106 cfu/bird and 1×108 cfu/bird Salmonella enteritidis in 26 and 30 weeks of ege, respectively. The results showed that adding probiotic was increased fractional weight of yolk and liver (P<0.05). The number of large and small yellow follicles were decreased significantly in response to the challenge with Salmonella compared with the control. The results of this study did not show any benefit of adding probiotic on performance of broiler breeder hens contaminated with Salmonella enteritidis.
Seyed Abdolla Hosseini; Mojtaba Zaghari; Houshang Lotf-allahian; Mahmoud Shivazad; Hossein Moravej
Volume 42, Issue 4 , March 2012, , Pages 329-336
Abstract
An experiment was conducted to determine the appropriate methionine level in broiler breeder’s diet. The treatments consisted of 6 levels of methionine (0.2, 0.25, 0.3, 0.35, 0.4 and 0.45% diets), with 4 replicates of 7 hens each for a duration of 8 weeks and for ages of 28 to 35 weeks. Diets contained ...
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An experiment was conducted to determine the appropriate methionine level in broiler breeder’s diet. The treatments consisted of 6 levels of methionine (0.2, 0.25, 0.3, 0.35, 0.4 and 0.45% diets), with 4 replicates of 7 hens each for a duration of 8 weeks and for ages of 28 to 35 weeks. Diets contained similar levels of protein metabolizable energy. The levels of the other amino acids were taken equal in all the diets to ensure that methionine was chosen as the only limiting amino acid in each dietal treatment. Feed intake, egg production, egg weight, settable eggs, egg mass, feed conversion ratio, egg content and SRBC responses were evaluated during the experimental periods. For finding out the optimum methionine level, Simple Additive Weighted (SAW) and Technique for Order Preference by Similarity to Ideal Solution (TOPSIS) methods as well as economic maximum equation were employed. Application of multi attribute decision making system SAW and TOPSIS indicated the appropriate methionine levels as 0.329 and 0.297 percent in the diets, respectively. Total methionine content in the diets, for maximum economic profit (according to feed cost and chick value) was recorded as 0.307. Results finally indicated that using 0.3-0.33 percent methionine in the Arian broiler breeder diets could be approppriately suggested for maximum performance and most economical profit.
Soudabe Moradi; Mojtaba Zaghari; Mahmoud Shivazad; Rahim Osfouri; Mohsen Mardi
Volume 42, Issue 2 , October 2011, , Pages 161-170
Abstract
This experiment was conducted to determine the effects of either twice or thrice a day feeding regimens on performance and as well on plasma hormone and metabolite levels of broiler breeder hens during 24 to 38 wk of their productive age. Breeder pullets were provided form a commercial flock, and distributed ...
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This experiment was conducted to determine the effects of either twice or thrice a day feeding regimens on performance and as well on plasma hormone and metabolite levels of broiler breeder hens during 24 to 38 wk of their productive age. Breeder pullets were provided form a commercial flock, and distributed in experimental units, in a compeletly randomized design with three feeding regimens (treatments) included 1, 2 or 3 feeding times per day with 4 replicates. Birds fed once a day, received all their total feed at 06:15 h, whereas birds fed twice a day, received 50% of their total feed allowance at 06:15 h and the other 50% at 12:15 h, and while birds fed thrice a day, received 33% of their total feed at 06:15 h, 33% at 12:15 h and the last portion at 18:15 h. Total daily feed did not differ among treatments. Blood samples were taken at the peak of production (32 wk of age) and at the end of trial (38 wk of age). For the 13 wk production period, total hen-day egg production through 38 wk of age in the hens that were provided feed twice and thrice a day was greater (67.1 and 67.2 vs 62.2 eggs/hen, P
