相对湿度对肉鸡生长和屠宰性能及肉品质的影响

发布时间：2018-07-16 14:52

【摘要】：【目的】研究舍内相对湿度(RH)对肉鸡生产性能、屠宰性能和肉品质的影响,为标准化养殖环境控制提供数据支持。【方法】将270只1日龄健康AA肉公鸡随机分成正常对照组(60%RH)、低湿组(30%RH)和高湿组(90%RH)3组,每组6个重复,每个重复15只。试验在人工气候实验舱内进行,试验期为42d。在肉鸡21和42日龄时,测定不同RH下肉鸡生产性能、屠宰性能和肉品质指标。【结果】1~21日龄阶段,与对照组相比,低湿组肉鸡平均日增重(ADG)显著降低(P0.05),料重比(F/G)显著增加(P0.05);高湿组ADG、F/G、平均日采食量(ADFI)差异均不显著(P0.05)。在22~42日龄阶段,与对照组相比,低湿组肉鸡ADFI和ADG显著降低(P0.05);高湿组ADFI显著降低(P0.05)。1~42日龄,与对照组相比,低湿组ADFI和ADG显著降低(P0.05),F/G增加(P0.05);高湿组ADFI和ADG降低,F/G提高,但差异不显著(P0.05)。与对照组相比,高湿组42日龄肉鸡屠宰率显著降低(P0.05),21日龄肉鸡胸肌的蒸煮损失显著提高(P0.05),21日龄肉鸡胸肌的剪切力显著降低(P0.05);低湿组42日龄肉鸡胸肌的黄度值(b*)值显著提高(P0.05)。【结论】低湿或高湿均不利于肉鸡生长,其中低湿可显著降低肉鸡平均日增重和饲料转化率,而高湿则显著影响肉鸡的屠宰性能及肉品质。
[Abstract]:[objective] to study the effects of relative humidity (RH) on performance, slaughter performance and meat quality of broilers. [methods] 270 1-day-old AA broilers were randomly divided into three groups: normal control group (60 RH), low humidity group (30 RH) and high humidity group (90 RH). The experiment was carried out in an artificial climate chamber for 42 days. At 21 and 42 days of age, the performance, slaughter performance and meat quality index of broilers at different RH levels were measured. The average daily gain (ADG) was significantly decreased (P0.05) and the feed / weight ratio (FRG) was significantly increased (P0.05) in the low humidity group, but there was no significant difference (P0.05) in the average daily intake (ADFI) between the high humidity group and the high humidity group. ADFI and ADG in low humidity group were significantly lower than those in control group (P0.05), and ADFI and ADG in high humidity group were significantly lower than those in control group (P0.05). Compared with control group, ADFI and ADG in low humidity group were significantly lower than those in control group (P0.05); ADFI and ADG decreased in high humidity group (P0.05). But the difference was not significant (P0.05). Compared with the control group, The slaughter rate of 42-day-old broilers in the high humidity group was significantly decreased (P0.05), the cooking loss of the pectoralis muscle of the 21-day-old broilers was significantly increased (P0.05), the shear force of the breast muscles of the 21-day-old broilers decreased significantly (P0.05), and the yellow value of the pectoralis muscle (b*) of the 42-day-old broilers in the low-humidity group was significantly increased (P0.05). Low humidity or high humidity is not good for the growth of broilers. Low humidity significantly reduced the average daily gain and feed conversion rate of broilers, while high humidity significantly affected slaughter performance and meat quality of broilers.
【作者单位】：中国农业科学院北京畜牧兽医研究所动物营养学国家重点实验室;
【基金】：国家重点研发计划项目(2016YFD0500509) 现代农业产业技术体系建设专项(CARS-42) 中国农业科学院科技创新工程项目(ASTIP-IAS07)
【分类号】：S831

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