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首页> 外文期刊>Tropical Animal Health and Production >Response to dietary tannin challenges in view of the browser/grazer dichotomy in an Ethiopian setting: Bonga sheep versus Kaffa goats
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Response to dietary tannin challenges in view of the browser/grazer dichotomy in an Ethiopian setting: Bonga sheep versus Kaffa goats

机译：鉴于埃塞俄比亚环境中的浏览器/放牧器二分法，对饮食中单宁酸挑战的反应：邦加羊与卡法羊

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摘要

It has been suggested that goats (typical browser) are better adapted to digest tannin-rich diets than sheep (typical grazer). To evaluate this, Bonga sheep and Kaffa goats were used in a 2x3 randomized crossover design with two species, three diets, and three periods (15-day adaptation+7-day collection). The dietary treatments consisted of grass-based hay only (tannin-free diet=FT), a high-tannin diet (36 % Albizia schimperiana (AS)+9 % Ficus elastica (FE)+ 55 % FT (HT)), and HT+polyethylene glycol 6000 (PEG). Animals were individually fed at 50 g dry matter (DM)/kg body weight (BW) and had free access to clean drinking water and mineralized salt licks. Nutrient intake, apparent nutrient digestibility, nutrient conversion ratios, and live weight changes were determined. Condensed tannin concentrations in AS and FE were 110 and 191 g/kg DM, respectively. Both sheep and goats ate 47 % more of HT than FT, and dry matter intake further increased by 9 % when PEG was added, with clear difference in effect size between goats and sheep (P0.001). The effects of the tannin-rich diet and PEG addition were similarly positive for DM digestibility between sheep and goats, but crude protein (CP) digestibility was higher in HT+PEG-fed goats than in sheep fed the same diet. However, PEG addition induced a larger improvement in growth performance and feed efficiency ratio in sheep than in goat (P0.001). The addition of PEG as a tannin binder improved digestion and performance in both species, but with the highest effect size in sheep.
机译：已经提出，山羊（典型的浏览器）比绵羊（典型的放牧者）更适合消化富含单宁的食物。为了对此进行评估，将Bonga羊和Kaffa山羊用于2x3随机交叉设计中，该设计具有两种，三种饮食和三个时期（适应15天+收集7天）。饮食疗法包括仅基于草料的干草（无丹宁饮食= FT），高丹宁饮食（36％苦参（AS）+ 9％弹性榕（FE）+ 55％FT（HT）），以及HT +聚乙二醇6000（PEG）。以50克干物质（DM）/ kg体重（BW）单独喂养动物，可以自由获得清洁的饮用水和矿化的盐舔。确定营养摄入量，表观养分消化率，养分转化率和活体重变化。 AS和FE中的单宁浓缩浓度分别为110和191 g / kg DM。绵羊和山羊的HT比FT高47％，添加PEG后干物质的摄入量进一步增加9％，山羊和绵羊的效应量差异明显（P <0.001）。富含鞣酸的饮食和添加PEG的效果对绵羊和山羊之间的DM消化率同样呈阳性，但在HT + PEG喂养的山羊中，粗蛋白（CP）的消化率高于相同饮食的绵羊。但是，与山羊相比，添加PEG可以使绵羊的生长性能和饲料利用率提高更大（P <0.001）。加入PEG作为单宁结合剂可改善两种物种的消化和性能，但对绵羊的影响最大。

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