PDF(Pubmed)
Abstract：
The study compared nutrient intake and growth performance of local chickens to that of local x broiler crossbreds under scavenging and indoor conventional systems. A total of 48 male and 48 female chickens for each of the two chicken types were allocated to four outdoor free-range pens. The chickens were allowed to scavenge whilst being supplemented with sorghum plus kitchen waste and broiler growers from week 5 to week 13 of age. The same design was repeated using the indoor conventional system. Local chickens and their crosses with broilers had higher growth rates under the scavenging system than the indoor production system (P < 0.05). Local chickens and their crosses with broilers had the same growth rates when fed the same diet (P > 0.05). Crop and gizzard contents from local chickens had the same crude protein as their crosses with broilers under both systems (P > 0.05). The crude protein values of crop and gizzard contents ranged from 25.4 to 30.4%. Crop and gizzard contents from scavenging chickens had energy content ranging from 16.2 to 17.1 MJ/Kg which was lower (P < 0.05) than that from chickens under the indoor conventional system (20.3 to 25.8 kJ/Kg). Iron content ranged from 655.7 to 1619.4 mg/Kg in scavenging chickens and 156.1 to 621.4 mg/Kg in enclosed chickens. Chickens of the same type had higher iron content in their crop and gizzard contents under the scavenging system than the conventional system (P < 0.05). Crossbreds between local chickens and broilers matches the scavenging abilities of the local chickens but have lower growth rates under the scavenging system.
摘要：
该研究比较了在清除和室内常规系统下，当地鸡与当地x肉鸡杂种的营养摄入量和生长性能。两种鸡类型中的每一种共48只雄性和48只雌性鸡被分配到四个户外散养围栏中。从第5周至第13周龄，在补充高粱加厨房垃圾和肉鸡种植者的同时，允许鸡清除。使用室内常规系统重复相同的设计。本地鸡及其与肉鸡的杂交在清除系统下的生长速率高于室内生产系统（P<0.05）。饲喂相同日粮时，本地鸡及其与肉鸡的杂交具有相同的生长速率（P>0.05）。在两种系统下，本地鸡的作物和gizard含量与肉鸡的杂交具有相同的粗蛋白（P>0.05）。作物和g子含量的粗蛋白值范围为25.4％至30.4％。清除鸡的作物和g的能量含量为16.2至17.1MJ/Kg，低于室内常规系统下的鸡的能量含量（20.3至25.8kJ/Kg）（P<0.05）。清除鸡中的铁含量范围为655.7至1619.4mg/Kg，封闭鸡中的铁含量范围为156.1至621.4mg/Kg。同类型的鸡在清除系统下的作物铁含量和g含量均高于常规系统（P<0.05）。本地鸡和肉鸡之间的杂种与本地鸡的清除能力相匹配，但在清除系统下的生长速率较低。
