飼糧異亮氨酸水平對肥育豬生長性能、胴體性狀和肉品質(zhì)的影響
發(fā)布時間：2018-09-14 10:24
【摘要】：本試驗旨在研究飼糧異亮氨酸水平對肥育豬生長性能、胴體性狀和肉品質(zhì)的影響。選取體重為(77.0±0.1)kg的杜×長×大三元雜交去勢公豬72頭,隨機分為3組,每組6個重復(fù),每個重復(fù)4頭豬。3組試驗豬分別飼喂含0.25%(低異亮氨酸水平,表現(xiàn)為異亮氨酸缺乏,L-Ile組)、0.39%(NRC推薦異亮氨酸水平,N-Ile組,作為對照組)和0.53%(高異亮氨酸水平,表現(xiàn)為異亮氨酸超量添加,H-Ile組)標準回腸可消化異亮氨酸的飼糧。試驗期為28 d。結(jié)果表明:飼糧異亮氨酸水平對肥育豬的平均日增重和平均日采食量沒有顯著影響(P0.05),但L-Ile組料重比較對照組顯著增加(P0.05);隨著飼糧異亮氨酸水平的增加,肥育豬背最長肌肌內(nèi)脂肪含量線性提高(P0.05),而剪切力線性下降(P0.05);與對照組相比,采食異亮氨酸缺乏飼糧的肥育豬的背膘厚、眼肌面積和肉色評分顯著降低(P0.05),采食異亮氨酸缺乏或超量添加飼糧的肥育豬的熱胴體重、屠宰率以及背最長肌滴水損失和黃度值均顯著降低(P0.05);隨著飼糧異亮氨酸水平的增加,血清甘油三酯含量線性提高(P0.05),血清尿素氮含量線性下降(P0.05);與對照組相比,采食異亮氨酸超量添加飼糧的肥育豬的血清葡萄糖含量顯著增加(P0.05),采食異亮氨酸缺乏飼糧的肥育豬的血清中游離的必需氨基酸、非必需氨基酸和總氨基酸的濃度顯著降低(P0.05),而采食異亮氨酸缺乏或超量添加飼糧的肥育豬血清總膽固醇、低密度脂蛋白和高密度脂蛋白含量均顯著降低(P0.05)。由此得出,飼糧中異亮氨酸缺乏對肥育豬生長性能、胴體性狀和肌內(nèi)脂肪含量有負面影響,而超量添加異亮氨酸會顯著改善肌肉的剪切力和滴水損失,增加肌內(nèi)脂肪含量,但會以降低熱胴體重、屠宰率為代價。
[Abstract]:The purpose of this study was to study the effects of dietary isoleucine level on growth performance, carcass traits and meat quality of fattening pigs. 72 ovariectomized boars with a body weight of (77.0 鹵0.1) kg were randomly divided into 3 groups, with 6 replicates in each group, and 0.25% (low isoleucine level) in each group of 4 pigs. The diet with standard ileal digestible isoleucine was 0.39% (NRC recommended isoleucine level N-Ile group as control group) and 0.53% (high isoleucine level in high isoleucine group). The experimental period is 28 days. The results showed that the dietary isoleucine level had no significant effect on the average daily gain and average daily intake of fattening pigs (P0.05), but the feed weight of L-Ile group was significantly higher than that of the control group (P0.05), and with the increase of dietary isoleucine level, The intramuscular fat content of longissimus dorsi muscle increased linearly (P0.05), while the shear stress decreased linearly (P0.05). Eye muscle area and meat color score decreased significantly (P0.05). The hot carcass weight, slaughter rate, drop water loss and yellowness of longissimus dorsi muscle were significantly decreased in fattening pigs fed with isoleucine deficiency or excessive dietary supplementation (P0.05). Serum triglyceride content increased linearly (P0.05), serum urea nitrogen content decreased linearly (P0.05). The serum glucose content of the fattening pigs fed with the excess amount of isoleucine was significantly increased (P0.05), and the free essential amino acids in the serum of the fattening pigs fed with isoleucine deficiency diet were significantly increased. The concentrations of non-essential amino acids and total amino acids were significantly decreased (P0.05), while the serum total cholesterol, low density lipoprotein and high density lipoprotein contents were significantly decreased in fattening pigs fed with isoleucine deficiency or excess diet (P0.05). It was concluded that the deficiency of isoleucine in diet had a negative effect on growth performance, carcass traits and intramuscular fat content of fattening pigs, while excessive addition of isoleucine could significantly improve the shear force and drop loss of muscle and increase the content of intramuscular fat. But it will reduce the weight of hot carcass and slaughter rate.
【作者單位】： 中國農(nóng)業(yè)大學動物科技學院動物營養(yǎng)學國家重點實驗室;
【基金】：國家973計劃項目(2012CB124700) 國家自然科學基金項目(31272452)
【分類號】：S828.5
本文編號：2242436
[Abstract]:The purpose of this study was to study the effects of dietary isoleucine level on growth performance, carcass traits and meat quality of fattening pigs. 72 ovariectomized boars with a body weight of (77.0 鹵0.1) kg were randomly divided into 3 groups, with 6 replicates in each group, and 0.25% (low isoleucine level) in each group of 4 pigs. The diet with standard ileal digestible isoleucine was 0.39% (NRC recommended isoleucine level N-Ile group as control group) and 0.53% (high isoleucine level in high isoleucine group). The experimental period is 28 days. The results showed that the dietary isoleucine level had no significant effect on the average daily gain and average daily intake of fattening pigs (P0.05), but the feed weight of L-Ile group was significantly higher than that of the control group (P0.05), and with the increase of dietary isoleucine level, The intramuscular fat content of longissimus dorsi muscle increased linearly (P0.05), while the shear stress decreased linearly (P0.05). Eye muscle area and meat color score decreased significantly (P0.05). The hot carcass weight, slaughter rate, drop water loss and yellowness of longissimus dorsi muscle were significantly decreased in fattening pigs fed with isoleucine deficiency or excessive dietary supplementation (P0.05). Serum triglyceride content increased linearly (P0.05), serum urea nitrogen content decreased linearly (P0.05). The serum glucose content of the fattening pigs fed with the excess amount of isoleucine was significantly increased (P0.05), and the free essential amino acids in the serum of the fattening pigs fed with isoleucine deficiency diet were significantly increased. The concentrations of non-essential amino acids and total amino acids were significantly decreased (P0.05), while the serum total cholesterol, low density lipoprotein and high density lipoprotein contents were significantly decreased in fattening pigs fed with isoleucine deficiency or excess diet (P0.05). It was concluded that the deficiency of isoleucine in diet had a negative effect on growth performance, carcass traits and intramuscular fat content of fattening pigs, while excessive addition of isoleucine could significantly improve the shear force and drop loss of muscle and increase the content of intramuscular fat. But it will reduce the weight of hot carcass and slaughter rate.
【作者單位】： 中國農(nóng)業(yè)大學動物科技學院動物營養(yǎng)學國家重點實驗室;
【基金】：國家973計劃項目(2012CB124700) 國家自然科學基金項目(31272452)
【分類號】：S828.5
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