苜蓿草粉替代花生秧对波尔山羊屠宰性能及肉品质的影响

本文旨在研究苜蓿草粉替代花生秧对波尔山羊屠宰性能及肉品质的影响。选取75只3月龄、体重相近（24～28 kg）的雌性健康波尔山羊，随机分为5个处理，每个处理3个重复，每个重复5只羊，在基础饲粮中分别用0%，10%，20%，30%，40%的苜蓿草粉等量替代花生秧。结果表明：用苜蓿草粉代替等量花生秧，胴体净肉率得到显著改善（P<0.05）。和对照组相比，羊肉的滴水损失和剪切力显著降低（P<0.05）。试验组羊肉的多不饱和脂肪酸总量、亚油酸和花生四烯酸含量与对照组相比均差异显著（P<0.05）；随着苜蓿草粉添加水平的提升，羊肉的α-亚麻酸和γ-亚麻酸含量有依次递增、ω-6/ω-3比例依次下降的趋势，其中试验Ⅲ、Ⅳ组ω-6/ω-3符合人体需要的比值6水平。试验组羊肉中未检到二十碳五烯酸，对照组未检到亚麻酸。综合研究表明，用苜蓿草粉替代部分花生秧，改善了波尔山羊的肉品质。

Effects of Alfalfa Meal Substituting Peanut Vine on the Slaughter Performance and Meat Quality of Boer Goats

The objective of this study was to explore effects of alfalfa meal substituting peanut vine on the slaughter performance and meat quality of mutton sheep. Seventy-five healthy Boer goats (female) with 3-month-old and 24~28 kg body weight were randomly divided into 5 groups with 3 replicates each group and 5 goats each replicate. The five groups were fed 0%,10%,20%,30%,and 40% alfalfa meal instead of peanut vine in basal diet,respectively. The results showed that the carcass net meat percentage of alfalfa meal groups was significantly improved (P<0.05). Compared with the control group,the water loss rate and shear force of the mutton were significantly reduced (P<0.05). The polyunsaturated fatty acid contents,including linoleic acid and arachidonic acid,were significantly lower than those of the control group (P<0.05). With the increase of alfalfa meal percentage,the contents of α-linolenic acid and γ-linolenic acid in mutton had increased tendency,the proportion of ω-6/ω-3 had decreased tendency,and ω-6/ω-3 of group Ⅲ and IV was arrived 6 level of suitable human requirement. Timnodonic acid in alfalfa groups and linolenic acid in control group had not be found in mutton. The study showed that the meat quality of Boer goat was improved as some alfalfa meal was instead of peanut vine.