جستجوی مقالات مرتبط با کلیدواژه "production management" در نشریات گروه "علوم دام"

Effects of stocking density and the type of material used as litter on production performance and economic parameters of broilers were investigated by using 2,016 day-old Ross-308 broiler chicks in a 3×2 factorial arrangement with three levels of birds placement density [PD; 10 (control), 14, and 18 birds per square meter], and two types of bedding material [BM; wood shavings (control), and cardboard roll] based on a randomized complete block design with six treatments and four replications. The results showed that feed intake and weight gain of broilers with 10 birds density were significantly higher compared to 18, and 14 birds/m2 (P < 0.05). The feed conversion ratio of the birds that were raised on wood shavings was lower significantly in comparison with the birds grown on cardboard roll (P < 0.05). The highest values of economic indicators (benefit to cost ratio, and profit margin) were observed in PD 14 and then 18 birds/m2, both of which indicated a significant difference with the density of 10 birds/m2 (P < 0.01). Based on the results of current study, PD 14 birds/m2 in comparison with other PDs, by reducing the fixed costs of production, as well as numerical improvement in feed conversion can provide broiler farmers with more profit; moreover, cardboard roll with regard to its negative effect on feed efficiency cannot be used as an appropriate alternative for wood shavings.

The main objective of this study is an investigation of educational needs of poultry cooperative members about production management of broilers. This research was applicable from objective point of view and descriptive-correlation method considering its method، which has been done with survey approach. The statistical population is the members of the poultry cooperatives in Southern Khorasan Province which were included 413 persons. Among this population، 144 persons were selected using Cochran formula and proportional stratified random sampling method. Meanwhile، the total number of 22 experienced experts in livestock and veterinary sinces from southern khorasan province Jahad- Keshavarzi organization and veterinary general office were selected through a survey. The main tool for data collection was questionnaire and its reliability was calculated by Cronbach’s alpha coefficient، which was equal to 88 percent. The results of this study showed that acquaintance cases about vaccination method and drinking systems، water quality test، acquaintance regarding frostbite and heat stroke control in chicks are the most important educational needs of poultry producers. In this study، there is a significant and positive relationship between the number of poultry، number of family and income from production of broilers with the educational needs of poultry producers. Whereas، there is a significant and negative relationship between education levels، access level to city، Communication - information channels and appropriate educational practices with the educational needs of poultry producers were observed. Access level to city، appropriate educational practices، education level and number of poultry were variables with maximum share in variation of dependent variable (educational needs of poultry producers). As a whole، these variables determined 42 percent of variance in dependent variable.