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首页> 外文期刊>Tropical Animal Health and Production >Effects of inclusion of licorice (Glycyrrhiza glabra L.) leaves, a tannin-containing plant, in a low-protein diet on feedlot performance and carcass characteristics of fat-tailed lambs
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Effects of inclusion of licorice (Glycyrrhiza glabra L.) leaves, a tannin-containing plant, in a low-protein diet on feedlot performance and carcass characteristics of fat-tailed lambs

机译：低蛋白日粮中含有单宁的甘草（甘草叶）叶片对肥尾羔羊饲喂性能和car体特性的影响

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The protein-sparing effect of condensed tannins (CT) was investigated in growing lambs fed a low- or high-protein diet during a 50-day period. Isocaloric diets containing 106 g crude protein/kg dry matter (DM) (low protein; LP) or 138 g crude protein/kg DM (high protein; HP) were formulated using 70 % concentrate, 15 % corn silage, and 15 % dried licorice leaves, providing CT (4.1 g/kg DM). Twenty-four crossbred male lambs (3-4 months old, 23.9 +/- 5.2 kg body weight) were assigned to one of four diets: LP with polyethylene glycol (PEG; 40 g/kg DM) supplementation (LP + PEG), LP without PEG supplementation (LP - PEG), HP with PEG supplementation (HP + PEG), and HP without PEG supplementation (HP - PEG). The effect of dietary crude protein level and CT on feed intake was not significant (P > 0.05). However, a positive effect on daily gain (P 0.001) and feed conversion ratio (FCR; P 0.01) was observed in lambs fed with HP diets. An interaction effect between crude protein level and PEG was observed, and consequently, FCR was higher in group LP + PEG (10.1; P 0.05) than in groups LP - PEG (7.3), HP + PEG (5.3), or HP - PEG (5.4). There was also an interaction effect between crude protein level and PEG on kidney, pelvic, and heart fat, presenting a higher relative weight in group LP + PEG (12.6 g/kg) than in group HP + PEG (9.2 g/kg; P 0.05), but no (P > 0.05) in groups without PEG supplementation. These preliminary results suggest that the use of CT can minimize the negative effect of low-protein diets on FCR in lambs.
机译：在生长50天的低蛋白饮食或高蛋白饮食的羔羊中，研究了缩合单宁（CT）的蛋白质保留作用。使用70％的精矿，15％的玉米青贮饲料和15％的干粉配制包含106 g粗蛋白/ kg干物质（DM）（低蛋白; LP）或138 g粗蛋白/ kg DM（高蛋白; HP）的等热量日粮甘草叶，提供CT（4.1 g / kg DM）。将二十四只杂种公羊羔（3-4个月大，体重23.9 +/- 5.2千克）分配给以下四种饮食之一：补充有聚乙二醇的LP（PEG; 40 g / kg DM）（LP + PEG）;不含PEG的LP（LP-PEG），不含PEG的HP（HP + PEG）和不含PEG的HP（HP-PEG）。日粮粗蛋白水平和CT对饲料摄入量的影响不显着（P> 0.05）。但是，在饲喂HP日粮的羔羊中，观察到对日增重（P <0.001）和饲料转化率（FCR; P <0.01）的积极影响。观察到粗蛋白水平与PEG之间有相互作用的影响，因此，LP + PEG组（10.1; P <0.05）的FCR高于LP-PEG（7.3），HP + PEG（5.3）或HP- PEG（5.4）。粗蛋白水平和PEG对肾脏，骨盆和心脏脂肪之间也有相互作用的影响，LP + PEG组（12.6 g / kg）的相对体重高于HP + PEG组（9.2 g / kg; P <0.05），但在没有PEG补充的组中没有（P> 0.05）。这些初步结果表明，使用CT可以使低蛋白饮食对羔羊FCR的负面影响最小化。

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