فهرست مطالب f. kheiri

The study was carried out to determine the reducing microbial load status of broiler carcasses throughout of cold water chilling, hydrogen peroxide solution and ozone therapy. A total number of 45 broilers carcasses from automatic poultry slaughter plant in Chaharmahal and Bakhtiari Province taken from one batch (The same flock) and it was expected to have a high degree of similarity after complete preparation (Slaughtering-scalding-defeathring evisceration) and just before placing in the chillers. Fifteen carcasses were placed in the ordinary chiller containing cold water for 60 min, other 15 were placed in another similar chiller containing aqueous solution of 0.2% hydrogen peroxide and others were treated by ozone (7 mg per min) for the same time period. Total colony count, mould and yeast count, coliform count and Staphylococcus aureus counts were determined in all groups. The reduction percent in the microbial counts were detected. The result showed that highly significant reduction in the numbers of total colony count, coliform count and Staphylococcus aureus count and non significant decrease in the total mould and yeast count in comparison with the untreated ones. Data from this study showed that hydrogen peroxide and ozone therapy induced microbial. Additionally illustrate a very high reduction percent in the total counted colonies, coliform count and Staphylococcus aureus count and little reduction in the total mould and yeast count as a result of addition of hydrogen peroxide into the water used for chilling broiler carcasses. It was concluded that hydrogen peroxide and ozone therapy indicate superior activity as a powerful and versatile sanitizer for poultry carcass.

In order to study the effect of replacing different levels of date meal to corn, 180 one-day-old male broiler Ros308 chicks with 5 treatments and 3 replicates were used. The chicks had free access to food and water during the experimental period. Five experimental treatments were as follows: the first treatment (control group) consisted of the diet which lacked date meal, the second treatment was the diet which contained %5 of date meal which replaced corn, the third treatment was the diet which contained %10 of date meal, in the fourth treatment %15 date meal was used and in the fifth treatment %20 of date meal was used. In this experiment, feed consumption, average daily gain, feed conversion and the measurement of the metabolism energy were recorded after the end of each week and the broiler chicks were weighted each week. At the end of the experimental period two broilers from each pen were selected, killed and then dressing percentage, abdominal fat (the fat around the cloaca and gizzard), intestines, gizzard, spleen, pancreas, liver and gall-bladder were measured. The best average daily gain was observed in the group which had %15 date meal. Maximum feed consumption was observed in the group with %5 date meal and minimum feed consumption in the control group. The most body weight gain was related to %15 replacement group and the most dressing percentage was related to %15 replacement of the date meal group. The most fecal moisture was related to %20 date meal. Considering intestinal histopathological study, the diet containing %10 date meal had the least effect on intestinal thickness. According to the results, 15% is the best level of date meal inclusion in the diet of cockerels.