饲养方式对城口山地鸡生长及部分肉质指标的影响
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摘要
探讨饲养方式对城口山地鸡生长性能及部分肉质指标的影响,以期为选取城口山地鸡适宜的饲养方式提供理论依据.将600只体况相近的1日龄健康城口山地鸡(公母各半)作为试验鸡,随机分成两组,一组采用放养的饲养方式,另一组采用舍饲的饲养方式,每组设5个重复,各60只.饲喂至4月龄时,分别从每个重复中随机抽取6只(公母各半),每组共30只鸡(公母各半)进行屠宰,取肉样,测定并比较生长性能、物理性状和肉质营养成分等指标.结果表明:饲养方式对4月龄城口山地鸡生长性能和肌肉营养成分的影响无统计学意义(p>0.05);物理性状方面,饲养方式对4月龄城口山地鸡公鸡胸肌pH值影响差异有统计学意义(p<0.05),对公鸡胸、腿肌的L*值,a*值影响差异有统计学意义(p<0.05),对其他性状影响差异无统计学意义(p>0.05).饲养方式对4月龄城口山地鸡生长性能和肌肉营养成分的影响均无统计学意义,而根据舍饲效率更高、成本较低、便于管理的特点,笔者认为饲养城口山地鸡至4月龄时使用舍饲方式较适宜.
In order to provide a theoretical basis for selecting suitable feeding modes for Chengkou mountain chickens,300 male and 300 female healthy one-day-old Chengkou mountain chickens were collected and divided at random into two groups with 5 replicates each,and the modes of dry-lot feeding and woodland stocking were adopted for the two groups respectively.Then,at the age of 4 months,3 male and 3 female chickens were collected from each replicate and slaughtered,and their meat samples were taken for the determination of growth performance,physical properties and meat nutrients.The results showed that rearing methods had no significant effect on the growth performance and muscle nutrient composition of 4-month-old Chengkou chickens(p>0.05).In the respect of physical properties of chicken muscle,rearing methods had significant effects on the pH value of their breast muscle(p<0.05),and there was a significant difference in the L value and the a value of the chest muscle in roosters(p<0.05),but no significant difference was observed in other traits(p>0.05).In conclusion,rearing methods have no significant effect on the growth performance and muscle nutrient composition of 4-month-old Chengkou mountain chickens,and since dry-lot feeding is characterized by higher feeding efficiency,lower cost and easiness of management,this feeding mode is recommended for the rearing of Chengkou mountain chickens up to an age of 4 months.
In order to provide a theoretical basis for selecting suitable feeding modes for Chengkou mountain chickens,300 male and 300 female healthy one-day-old Chengkou mountain chickens were collected and divided at random into two groups with 5 replicates each,and the modes of dry-lot feeding and woodland stocking were adopted for the two groups respectively.Then,at the age of 4 months,3 male and 3 female chickens were collected from each replicate and slaughtered,and their meat samples were taken for the determination of growth performance,physical properties and meat nutrients.The results showed that rearing methods had no significant effect on the growth performance and muscle nutrient composition of 4-month-old Chengkou chickens(p>0.05).In the respect of physical properties of chicken muscle,rearing methods had significant effects on the pH value of their breast muscle(p<0.05),and there was a significant difference in the L value and the a value of the chest muscle in roosters(p<0.05),but no significant difference was observed in other traits(p>0.05).In conclusion,rearing methods have no significant effect on the growth performance and muscle nutrient composition of 4-month-old Chengkou mountain chickens,and since dry-lot feeding is characterized by higher feeding efficiency,lower cost and easiness of management,this feeding mode is recommended for the rearing of Chengkou mountain chickens up to an age of 4 months.
引文
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