摘要
研究日粮添加蒙生草本生物调理剂(简称蒙生草)对固始鸡淘汰蛋鸡的胴体品质、肉质性状和血清指标的影响,从而提高淘汰蛋鸡的经济价值。选取42周龄体质量相近的固始鸡600只,随机分为2组,每组6个重复,每个重复50只,对照组饲喂基础日粮,试验组饲喂基础日粮+1%蒙生草,饲养45 d。结果表明,与对照组相比,试验组的屠宰率、半净膛率、全净膛率分别升高0.58、1.99、0.93个百分点(P>0.05);试验组45 min腿肌pH值显著升高,胸肌、腿肌滴水损失分别降低1.18、1.55个百分点(P<0.05);试验组的氨基酸组成无显著变化(P>0.05);试验组木蜡酸(C24∶0)、二十二碳六烯酸(C22∶6n3)分别降低20.75%、17.21%(P<0.05);试验组不饱和脂肪酸占总脂肪酸的比例提高了3.59个百分点,饱和脂肪酸占总脂肪酸的比例降低了3.59个百分点;试验组低密度脂蛋白(LDL)降低了18.28%(P<0.05)。综上,日粮中添加蒙生草能够在一定程度上改善产蛋后期固始鸡屠宰性能,有效改善脂类代谢状况,增加腿肌肌内脂肪含量和嫩度,减少滴水损失,优化脂肪酸组成,进而改善肉品质。
The purpose of this study was to explore the effects of Mengsheng herbal feed additive(Mengsheng grass for short)as a dietary supplement on carcass quality,meat quality and serum index of Gushi spent laying hens,so as to improve the economic value of spent laying hens.Six hundred42-week-old Gushi chickens with similar body weight were randomly divided into two groups with 6 replicates in each group and 50 chickens in each replicate.Chickens in the control group were fed a basal diet,those in the experimental group were fed a basal diet supplemented with 1%Mengsheng grass,and the feeding period lasted for 45 days.The results showed that compared with the control group,the dressed percentage,percentage of half-eviscerated yield and percentage of eviscerated yield of the experimental group increased by 0.58,1.99 and 0.93 percentage points respectively(P>0.05),the pH value of thigh muscle increased significantly at 45 min,and the drip loss of pectoral muscle and thigh muscle decreased by 1.18 and 1.55 percentage points respectively(P<0.05).There was no significant difference in amino acid composition between the experimental group and the control group(P>0.05).Compared with the control group,lignoceric acid(C24∶0)and docosahexaenoic acid(C22∶6 n3)of the experimental group decreased by 20.75%and 17.21%respectively(P<0.05),the proportion of unsaturated fatty acids in total fatty acids increased by 3.59 percentage points,and the proportion of saturated fatty acids in total fatty acids decreased by 3.59 percentage points(P<0.05).The Low density lipoprotein(LDL)of the experimental group decreased by 18.28%compared with the control group(P<0.05).In conclusion,the diet supplemented with Mengsheng grass could improve the slaughter performance of Gushi chickens in the late laying stage to a certain extent,effectively improve the lipid metabolism,increase the fat content and tenderness of thigh muscle,reduce drip loss,optimize fatty acid composition,and then improve meat quality.
作者
张怡辉
赵鑫龙
付亚伟
康相涛
李孝法
李东华
蒋瑞瑞
ZHANG Yihui;ZHAO Xinlong;FU Yawei;KANG Xiangtao;LI Xiaofa;LI Donghua;JIANG Ruirui(College of Animal Science and Technology,Henan Agricultural University,Zhengzhou 450046,China;Henan Sangao Agriculture Animal Husbandry Co.Ltd.,Gushi 465200,China)
出处
《河南农业科学》
北大核心
2022年第1期125-133,共9页
Journal of Henan Agricultural Sciences
基金
国家现代农业产业技术体系专项(CARS-40-K04,CARS-40-S14)。
关键词
淘汰蛋鸡
草本生物调理剂
屠宰性能
肉品质
脂肪酸组成
Spent laying hens
Herbal feed additive
Slaughter performance
Meat quality
Fatty acid composition
