【摘要】：本文通過對三種香蕉莖葉青貯飼料(香蕉莖葉+4%玉米面混合青貯、70%香蕉莖葉+30%稻草混貯及70%香蕉莖葉+30%干蔗梢混貯)育肥牛的屠宰指標以及肉質(zhì)理化指標進行測定分析,對比三種日糧的育肥牛肉質(zhì)的效果,探討三種香蕉莖葉青貯飼料對云南黃牛的屠宰性能及肉品質(zhì)的影響,并比較其優(yōu)缺點。試驗按日糧結(jié)構(gòu)分為三組,肉牛飼養(yǎng)結(jié)束后進行屠宰、分割,并分析其肉樣的理化指標及化學(xué)成分。結(jié)果表明:三種香蕉莖葉青貯飼料飼喂出的云南黃牛屠宰性能均較好,高檔肉塊比例較高,胴體最終等級均達到A(3±1)優(yōu)質(zhì)標準,營養(yǎng)豐富;第3組香蕉莖葉與甘蔗梢混合組,屠宰性能最好;其中第1組(添加4%玉米面)肉品質(zhì)相對最優(yōu),蛋白含量最高,氨基酸評分高出理想模式,屬于優(yōu)質(zhì)蛋白,說明利用玉米面與香蕉莖葉混合青貯飼料最好;在脂肪酸組成上,三種香蕉莖葉日糧育肥牛肉的SFA、PUFA、MUFA比例適合,且PUFA/SFA、n-6/n-3PUFA的比例均在理想推薦值范圍內(nèi),其中香蕉莖葉與稻草混合肉牛脂肪酸風(fēng)味最好,而香蕉莖葉與玉米面混合肉牛脂肪酸口感最佳,是具有合理健康的脂肪酸組成的優(yōu)質(zhì)肉類。本文結(jié)果可以為繼續(xù)開發(fā)香蕉莖葉飼料育肥高檔優(yōu)質(zhì)牛肉提供參考。
[Abstract]:In this paper, three kinds of banana stalk and leaf silage (banana stem and leaf 4% corn flour mixed silage) were studied. The slaughter index and meat quality index of fattening cattle were determined and analyzed, and the effects of the three diets on the meat quality of fattening cattle were compared with those of 70% banana stem and leaf mixed storage with 30% straw and 70% banana stem and leaf mixed storage with dry sugarcane shoot. The effects of three kinds of banana stalk and leaf silage on slaughter performance and meat quality of Yunnan yellow cattle were studied and their advantages and disadvantages were compared. The experiment was divided into three groups according to the structure of the diet. The beef cattle were slaughtered and partitioned after feeding, and the physicochemical indexes and chemical components of the meat samples were analyzed. The results showed that the three kinds of banana stalk and leaf silage had better slaughtering performance, higher proportion of high-grade meat, and the final grade of carcass were all up to A (3 鹵1) high quality standard. The dressing performance of the third group was the best when the banana stems and leaves were mixed with sugarcane shoots. The first group (supplemented with 4% corn flour) had the best meat quality, the highest protein content, the higher amino acid score than the ideal model, and belonged to the high quality protein, indicating that the silage mixed with corn flour and banana stem and leaf was the best. In terms of fatty acid composition, the SFA,PUFA,MUFA ratio of three kinds of banana stem and leaf diets for fattening beef was suitable, and the proportion of PUFA/SFA,n-6/n-3PUFA was within the ideal recommended value range. The fatty acid flavor of beef cattle mixed with banana stem and leaf and straw is the best, while the fatty acid of banana stem and leaf mixed with corn flour is the best. It is a good meat with reasonable and healthy fatty acid composition. The results can provide a reference for the further development of banana stem and leaf feed for fattening high quality beef.
【學(xué)位授予單位】：云南農(nóng)業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：S823.5

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