室外和牧场觅食可达性对肉鸡生产性能和胴体特性的影响

Jibia Z.S., Garba M.G., Sabo M.N., Gaddafi S., Ibrahim M.
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引用次数: 0

摘要

本试验旨在研究室外和牧场觅食可达性对黑鸡生产性能和胴体特性的影响。试验选用320只黑鸡,随机分为5个处理,每个处理重复4次,每个重复16只。在育雏阶段(2周)结束时,采用完全随机设计(CRD),将雏鸟置于2 × 2因子安排中(室外持续时间和牧场可达性被视为因素)。T2、T3、T4、T5分别为T1为对照(室内),T2为4小时室外可达性,T2为8小时室外可达性,4小时室外加牧草采食,8小时室外加牧草采食。本研究获得的数据进行方差分析(ANOVA),使用统计分析软件包(SAS)的Duncan多元极差检验(DMRT)分离均数。T2组的末重显著提高(p < 0.05);同样,T2期饲养的禽类增重较高(P<0.05)。结果表明,各处理间胴体和内脏重量比例均无显著差异(P>0.05)。然而,存在相当大的数值变化。T3的净重最高(70.333%),其次是T5、T2、T4和T1,分别为67.853、67.372、63.901和59.888%。结果表明,初始体重、饲料系数、每千克日粮饲料成本差异不显著(P>0.05)。由此可见,室外觅食和牧场觅食对黑鸡的生产性能有深远的影响。因此,建议增加体重和增重的鸟类还应丰富牧场觅食材料和至少4小时的户外活动。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of Outdoor and Pasture Foraging Accessibility on Performance and Carcass Characteristics of Noiler Birds
This experiment was carried out to determine the effect of outdoor and pasture foraging accessibility on performance responses and carcass characteristics of Noiler birds. A total number of 320 Noiler birds were divided into 5 treatments and each treatment was replicated 4 times with 16 birds per replicate. At the end of the brooding phase (2 weeks), the birds were placed in a 2 x 2 factorial arrangement (outdoor durations and pasture accessibility were considered as factors) in a completely randomised design (CRD). T1 serves as control (indoor), T2 4 hours outdoor accessibility, 8 hours outdoor, 4 hours outdoor plus pasture foraging and 8 hours outdoor plus pasture foraging for T2, T3, T4 and T5 respectively. The data obtained in this study were subjected to Analysis of Variance (ANOVA) where means were separated using Duncan Multiple Range Test (DMRT) of the Statistical Analysis Software package (SAS). The birds in T2 had significantly (P<0.05) higher final weight; similarly, higher (P<0.05) weight gain were observed in birds reared in T2. The result revealed that there are no significant (P>0.05) differences in both carcass and visceral weight proportion across all the treatments. However, considerable numerical variations exist. Higher dress weight was observed in T3 (70.333%) followed by T5, T2, T4 and T1 with 67.853, 67.372, 63.901 and 59.888% respectively. The result however, suggests non-significant (P>0.05) differences in initial weight, feed conversion ratio, feed cost per kilogram diet. It is therefore concluded that outdoor and pasture foraging has a profound effect on the performance profile of Noiler birds. It is therefore recommended for enhanced body weight and weight gain birds should also be enriched with pasture foraging material and at least 4 hours outdoor accessibility.
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