Showing 2 results for Broiler Chickens.
A.a. Gheisari, A.h. Pourabadeh, J. Pourreza, M. Mahlougi, R. Bahadoran,
Volume 11, Issue 41 (10-2007)
Abstract
This study was conducted to determine chemical composition and evaluated apparent metabolisable energy (AME) and true metabolisable energy (TME) values of five Iranian barley cultivars. Basal diet contained corn soybean and in each of the test diets barley was substituted for 30% of corn and soybean fractions. The study was carried out in 3 experiments. In experiment 1, metabolisable energy (ME) values were measured by both total collection and markers (chromic oxide) in excreta of 35-d-old chicks. In experiment 2, ME values of the barley cultivars were determined by ileal digesta procedure. In experiment 3, 36 48-d-old broiler chicks (used in experiment 1 and 2) were used to determine TME and the nitrogen corrected TME (TMEn) of the barley cultivars. Highly significant differences (P<0.05) between bioassay methods were observed on average barley ME values. The average barley AMEn value measured by ileal digesta method was significantly (P<0.05) higher than excreta (total collection and markers in excreta) (2716 Vs. 2318 and 2124 kcal/kg, respectively). Barley ME values were influenced by cultivar (P<0.05) and the hullless cultivar showed greater AME value than the hulled cultivars (2695 vs. 2407.5 kcal/kg AME 2630 vs. 2324.7 kcal/kg AMEn). Cultivar had no significant effect on barley TME value. It was concluded that there is high variation between energy contents of Iranian barley cultivars. In addition, ileal digesta was found not to be an accurate bioassay for determination of barley AME value in broiler chicks.
A.h. Rastad, A. Samie, F. Daneshvar,
Volume 12, Issue 43 (4-2008)
Abstract
This experiment was conducted in a completely randomized design with five treatments and four replications. There were 15 chicks in each replication during the first 30 days and 10 chicks from day 30 to the end of experiment. Diets were control (without probiotic and dry whey) and levels 500 and 750 gm/ton probiotic, and each level contained two diets with and without %2 dry whey. Daily weight gain, feed intake, feed conversion rate at the end of each experiment and carcass characteristics including weights of neck, Liver, wing, heart, and abdominal fat on the 49th day of experiment were measured. Chicks which received diets with 500 and 750 mg/ton probiotic +%2 dry whey were significantly heavier than other chicks (p<0/05) between 0-21 days. Feed intake significantly increased during 3 periods including 0-21, 21-42, and 42-49 days of experiment, when chicks used diets with dry whey, especially diets containing 750 gm/ton probiotic (P<0/05). Blood plasma cholesterol significantly decreased when chicks used diets with dry whey. Also an increase in white cells was observed in days 21 and 35. Treatments did not have any significant effect on feed conversion rate, mortality and carcass characteristics (P>0/05).
