Describing Growth Pattern Using Gompertz Growth Function – A Case Study of Kuchi Chicken in Kenya
محل انتشار: مجله علوم طیور، دوره: 8، شماره: 2
سال انتشار: 1399
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 177
فایل این مقاله در 9 صفحه با فرمت PDF قابل دریافت می باشد
- صدور گواهی نمایه سازی
- من نویسنده این مقاله هستم
استخراج به نرم افزارهای پژوهشی:
شناسه ملی سند علمی:
JR_PSJG-8-2_001
تاریخ نمایه سازی: 6 اردیبهشت 1400
چکیده مقاله:
This study was conducted to determine the growth patterns of the Kuchi ecotype of chicken in Kenya. Data was obtained from intensively reared Kuchi birds at Indigenous Chicken Improvement Programme (INCIP) facility at Egerton University. Gompertz's nonlinear growth model was fitted to the Kuchi longitudinal growth data to predict the live body weight at various age points and the growth curve parameters. Growth rate and maturity parameters for all ages were calculated using growth curve parameters. The inflection parameter including age at inflection (TI), body weight at inflection (BWI), and growth rate at inflection (GI) was also calculated using the growth curve parameters. Males had significantly (P < ۰.۰۵) higher body weight from week ۱۴ to week ۳۲, and absolute growth rate from week ۱۲ to week ۲۸ of age. Males were significantly (P < ۰.۰۵) superior to counterpart females in asymptote (A), body weight at inflection (BWI), and weight gain at inflection (GI). Females attained puberty earlier than counterpart males and from week ۸ of age, females were more mature than males with significant difference (P < ۰.۰۵) in both degree of maturity (U) and absolute maturity rate (AMR). From the results of this study, it is recommendable to rear Kuchi males and females separately from the age of inflection (week ۱۲) when they experience significantly different growth rates. Optimum feeding of Kuchi should be done at age of week ۸ to week ۱۴ when its growth rate is highest thus high feed conversion efficiency and consequently high-profit margin. Kuchi chickens were found to have slower juvenile growth and may not be the best ecotype of chicken for quick production of tender meat among the indigenous chicken ecotype found in Kenya.
کلیدواژه ها:
نویسندگان
- -
Animal Breeding and Genetics Group, Department of Animal Science, Egerton University, Egerton, Kenya. Livestock Efficiency Enhancement Group (LEEG), Department of Animal Science, Maseno University, Maseno, Kenya.
- -
Animal Breeding and Genetics Group, Department of Animal Science, Egerton University, Egerton, Kenya. Livestock Efficiency Enhancement Group (LEEG), Department of Animal Science, Maseno University, Maseno, Kenya.
- -
Animal Breeding and Genetics Group, Department of Animal Science, Egerton University, Egerton, Kenya.
مراجع و منابع این مقاله:
لیست زیر مراجع و منابع استفاده شده در این مقاله را نمایش می دهد. این مراجع به صورت کاملا ماشینی و بر اساس هوش مصنوعی استخراج شده اند و لذا ممکن است دارای اشکالاتی باشند که به مرور زمان دقت استخراج این محتوا افزایش می یابد. مراجعی که مقالات مربوط به آنها در سیویلیکا نمایه شده و پیدا شده اند، به خود مقاله لینک شده اند :