合適的標(biāo)準(zhǔn)回腸可消化色氨酸/賴氨酸比率( SID Trp/Lys),對(duì)育肥后期母豬飼喂低蛋白...

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合適的標(biāo)準(zhǔn)回腸可消化色氨酸/賴氨酸比率( SID Trp/Lys),對(duì)育肥后期母豬飼喂低蛋白日糧, 在改善生長(zhǎng)性能，調(diào)控激素與肌肉氨基酸轉(zhuǎn)運(yùn)體的研究

W. F. Ma, S. H. Zhang, X. F.Zeng, X. T.Liu, C. Y. Xie, G. J. Zhang and S. Y. Qiao

    本試驗(yàn)研究了不同標(biāo)準(zhǔn)回腸可消化色氨酸/賴氨酸比率 ( SID Trp/Lys)對(duì)飼喂低蛋白日糧（9.6%）并補(bǔ)充合成氨基酸在育肥母豬生長(zhǎng)性能和胴體指數(shù)的影響。選用90頭育肥母豬（89.1±5.1kg）進(jìn)行35天的試驗(yàn)。玉米-麥麩基礎(chǔ)日糧中添加合成色氨酸（0、0.1、0.2、0.4、0.6g/kg），使日糧中SIDTrp/Lys達(dá)到0.12、0.15、0.18、0.21、0.24。每種處理6欄，每欄3頭育肥母豬。試驗(yàn)結(jié)束時(shí)，每欄選取1頭育肥母豬，共計(jì)30頭屠宰后評(píng)價(jià)胴體性狀和肉質(zhì)（體重121kg）。SIDTrp/Lys增加可以提高日增重（線性和二次效應(yīng)，P＜0.05），同時(shí)改善G:F（線性和二次效應(yīng)，P＜0.05）。血清尿素氮含量隨比值的增加而降低（線性和二次效應(yīng)，P＜0.05）。處理對(duì)背長(zhǎng)肌大理石紋和L*light有二次效應(yīng)（P＜0.05）。SIDTrp/Lys的增加還會(huì)提高血漿中生長(zhǎng)激素的含量（二次效應(yīng)，P＜0.05），同時(shí)提高血漿中IGF-1的水平（線性和二次效應(yīng)，P＜0.05）。提高SIDTrp/Lys可以增加背最長(zhǎng)肌中鈉依賴中性氨基酸轉(zhuǎn)運(yùn)載體2（SNAT2）的蛋白質(zhì)豐度（線性和二次效應(yīng)，P＜0.05）。最大化日增重和G:F，最小化血漿尿素氮水平的合適的SID色氨酸:賴氨酸值在折線模型下分別為0.16、0.17和0.16，在二次方程模型下分別為0.20、0.20、0.20。色氨酸可影響飼喂低蛋白日糧的育肥母豬的血漿生長(zhǎng)激素、IGF-1，以及背最長(zhǎng)肌SNAT2氨基酸轉(zhuǎn)運(yùn)載體的蛋白質(zhì)豐度。

The appropriate standardized ilealdigestible tryptophan to lysine ratio improves pig performance and regulateshormones and muscular amino acid transporters in late finishing gilts fedlow-protein diets

W. F. Ma, S. H. Zhang, X. F. Zeng, X. T.Liu, C. Y. Xie, G. J. Zhang and S. Y. Qiao

    This study investigated the effects ofvarious standardized ileal digestible (SID) Trp to Lys ratios on theperformance and carcass characteristics of late finishing gilts receivinglow-CP (9.6%) diets supplemented with crystalline AA. Ninety gilts (89.1 ± 5.1kg) were used in a dose–response study conducted for 35 d. Crystalline Trp (0,0.1, 0.2, 0.4, or 0.6 g/kg) was added to a corn–wheat bran basal diet providingSID Trp to Lys ratios of 0.12, 0.15, 0.18, 0.21, or 0.24. Each diet was fed to6 pens of pigs with 3 gilts per pen. At the end of the experiment, 30 gilts (1 pigper pen) were slaughtered to evaluate carcass traits and meat quality (BW = 121kg). Increasing the SID Trp to Lys ratio increased ADG (linear and quadraticeffect, P < 0.05) and also improved G:F (linear and quadratic effect, P <0.05). Serum urea nitrogen (SUN) decreased as the SID Trp to Lys ratioincreased (linear and quadratic effects, P < 0.05). A quadratic effect of L*light and marbling in the longissimus dorsi was observed as the dietary SID Trpto Lys ratio increased (P < 0.05). Increasing the SID Trp to Lys ratioincreased the level of serum GH (quadratic effect, P < 0.05) and alsoincreased the level of serum IGF-1 (linear and quadratic effect, P < 0.05).Increasing the SID Trp to Lys ratio increased the protein abundance of themuscular AA transporter of sodium-coupled neutral amino acid transporter 2(SNAT2) in the longissimus dorsi muscle (linear and quadratic effect, P <0.05). The optimum SID Trp to Lys ratios to maximize ADG and G:F as well as tominimize SUN levels were 0.16, 0.17, and 0.16 using a linear-breakpoint modeland 0.20, 0.20, and 0.20 using a quadratic model. Tryptophan could influenceserum GH and IGF-1 secretion and protein abundance of the muscular AAtransporter of SNAT2 in the longissimus dorsi muscle in late finishing giltsfed low-protein diets.

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Journal of Animal Science (Impact Factor: 2.11). 03/2015; 93(3):1052-60. DOI: 10.2527/jas.2014-8275
建議發(fā)布的時(shí)候把文章的來源也附上。

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bonderic 發(fā)表于 2016-1-8 09:24
Journal of Animal Science (Impact Factor: 2.11). 03/2015; 93(3):1052-60. DOI: 10.2527/jas.2014-8275
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