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首页> 外文期刊>Czech Journal of Animal Science >Effect of Freeze-dried Pasture Herbage on Ileal Digestibility of Amino Acids and Fatty Acids in Chickens
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Effect of Freeze-dried Pasture Herbage on Ileal Digestibility of Amino Acids and Fatty Acids in Chickens

机译：冷冻干燥牧场牧草对鸡氨基酸和脂肪酸的肠蠕性消化率的影响

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摘要

The ileal digestibility of amino acids and fatty acids in young chickens fed control diet or experimental diets supplemented with freeze-dried pasture herbage at 20 or 40 g/kg was studied. Control diet contained wheat, maize, and soybean meal. Predominant species in the pasture herbage harvested in May were Lolium perenne, Festuca pratensis, and Trifolium pratense. Freeze-dried pasture herbage contained less protein (169 g/kg) and fat (24 g/kg) and more neutral detergent and acid detergent fibre (340 and 210 g/kg) and tannins (12.38 g/kg) than control diet. Concentrations of amino acids, except phenylalanine and threonine, were lower in pasture herbage than in control feed. In both the control feed and freeze-dried pasture herbage, unsaturated fatty acids occurred in higher proportions than saturated fatty acids. In freeze-dried pasture herbage linolenic acid was the main fatty acid. In chickens fed freeze-dried pasture herbage the ileal digestibility of amino acids and fatty acids decreased in a dose-dependent manner. Freeze-dried pasture herbage at 4% in diet had negative effect (P & 0.05) on the digestibility of amino acids and fatty acids in comparison with control diet. But there was no significant effect of 2% freeze-dried pasture herbage in diet on amino acids digestibility. This suggests that pasture herbage contains anti-nutritional factors that inhibit proteolysis and lipolysis. The effect of pasture herbage on digestibility was variable. In chickens fed diets containing 4% freeze-dried pasture herbage, apparent ileal digestibility of amino acids varied from 0.39 (cysteine) to 0.91 (methionine). Variability in the ileal digestibility of fatty acids was less pronounced (from 0.65 to 0.89).
机译：研究了氨基酸和脂肪酸的嗜睡剂和脂肪酸的嗜氨基酸和脂肪酸的嗜味剂或补充有20或40g / kg的冷冻干燥牧场牧草的实验饮食。控制饮食含有小麦，玉米和大豆饭。在5月份收获的牧场地收获的牧草中的主要物种是Lolium Perenne，Festuca Pratensis和Trifolium Praatense。冷冻干燥的牧场牧草含有较少的蛋白质（169g / kg）和脂肪（24g / kg）和更高的中性洗涤剂和酸性洗涤剂纤维（340和210g / kg）和单宁（12.38g / kg），而不是对照饮食。除苯丙氨酸和苏氨酸外，牧草浓度较低，牧草牧草低于对照饲料。在对照进料和冷冻干燥的牧场地区，不饱和脂肪酸在比饱和脂肪酸更高的比例中发生。在冷冻干燥的牧场牧场亚苯二甲酸是主要的脂肪酸。在喂养牛奶冻干牧场的鸡肉中，氨基酸和脂肪酸的髂骨消化率以剂量依赖性方式降低。饮食中4％的冷冻干燥的牧场牧草具有负效应（p＆amp; 0.05），与对照饮食相比，氨基酸和脂肪酸的消化率。但在氨基酸消化率饮食中，2％冻干牧场牧草没有显着影响。这表明牧草牧草含有抑制蛋白水解和脂解的抗营养因子。牧草牧草对消化率的影响是可变的。在鸡喂养含有4％冷冻干燥牧场的饮食中，氨基酸的表观髂骨消化率从0.39（半胱氨酸）变化至0.91（甲硫氨酸）。脂肪酸的髂骨消化率的可变性较小（从0.65-0.89）。

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