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首页> 外文期刊>International Journal of Poultry Sciences >Effects of Reduced Dietary Protein Concentrations with Amino Acid Supplementation on Performance and Carcass Quality in Turkey Toms 14 to 140 Days of Age
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Effects of Reduced Dietary Protein Concentrations with Amino Acid Supplementation on Performance and Carcass Quality in Turkey Toms 14 to 140 Days of Age

机译：饲喂14至140天大的土耳其汤姆斯猪饲料中降低的膳食蛋白质浓度和氨基酸补充对生产性能和Car体品质的影响

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An experiment over five grow-out phases was conducted with male B.U.T. Big 6 turkeys from day fourteen to 140. Four dietary treatments differing in protein concentration and amino acid supply were employed. Treatment 1 represented current feeding practice with relatively high protein concentrations of 265 g/kg in phase two (3-5 weeks) feed which then was gradually reduced to 161g/kg in P-VI feed (18-22 weeks). In treatment 2 dietary protein was reduced by ten percent but all essential amino acid s were balanced according to the amino acid profile of treatment 1. Diets fed in treatment 3 had also a ten percent reduced protein concentration but only Lys, Met+Cys, Thr, and Trp were balanced in feed formulation resulting in lower Arg, Val, Ile, and Leu concentrations compared to treatments 1 and 2. In treatment 4 crude protein was reduced by 20% but essential amino acid s were balanced as in treatment 2. Results suggested that low protein diets with a protein reduction up to ten percent can be fed without adverse effects on animal performance and carcass traits provided the whole range of essential amino acid s is balanced. It was concluded that Arg, Val, Ile, and Leu are important for optimum growth and should therefore be considered in diets containing 10% less crude protein . It was further concluded that in low protein diets providing sufficient amounts of essential amino acid s the ratio between sum of all essential amino acid s should not be higher than 48% of protein.
机译：对男性B.U.T.进行了五个成长阶段的实验从第14天到第140天吃六只大火鸡。采用了四种饮食疗法，这些饮食的蛋白质浓度和氨基酸供应不同。处理1代表了当前的饲喂实践，在第二阶段（3-5周）的饲料中蛋白质含量较高，为265 g / kg，然后在P-VI饲料中（18-22周）逐渐降低至161g / kg。在处理2中，饮食蛋白质降低了10％，但所有氨基酸都根据处理1的氨基酸分布进行了平衡。在处理3中进食的日粮蛋白质浓度也降低了10％，但只有Lys，Met + Cys，Thr与处理1和2相比，饲料配方中的，和Trp平衡，导致Arg，Val，Ile和Leu的浓度降低。在处理4中，粗蛋白降低了20％，但与处理2一样平衡了必需氨基酸。建议在蛋白质平衡范围内平衡的前提下，饲喂蛋白质含量低至10％的低蛋白饮食，而不会对动物的生产性能和car体性状造成不利影响。结论是Arg，Val，Ile和Leu对于最佳生长至关重要，因此应在粗蛋白含量降低10％的饮食中考虑。进一步得出结论，在提供足够数量的必需氨基酸的低蛋白饮食中，所有必需氨基酸之和之间的比例应不高于蛋白质的48％。

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