This experiment was conducted to evaluate the effects of including a mixed-dimensional attapulgite clay (MDA) into a naturally moldly diet for Hu lambs. Fifty male Hu lambs with similar initial body weight (28.24 ± 1.80 kg) were randomly allocated into five dietary treatments: a basal diet containing naturally occurring mycotoxins with 0, 0.5, 1.0, and 2.0 kg/t MDA, and basal diet with a commercial mycotoxin adsorbent SolisTM with montmorillonite as the major component at 1 kg/t. Both MDA and Solis increased average daily gain (ADG) and dry matter intake (DMI) (P ≤ 0.004), and there was no difference in growth performance between MDA and Solis (P ≥ 0.26). The final body weight, DMI, and ADG were linearly increased with increasing MDA supplementation (P < 0.01). Lambs treated with both MDA and Solis demonstrated greater apparent digestibility of dry matter (DM), organic matter (OM), and energy compared to the control group (P ≤ 0.03), and there were no differences in nutrient digestibilities between MDA and Solis (P ≥ 0.38). Digestibility of CP was linearly increased with the increasing MDA supplementation (P = 0.01). Neither MDA nor Solis affected rumen total volatile fatty acid (TVFA) concentration (P ≥ 0.39), but decreased the acetate to propionate ratio and molar proportion of n-butyrate (P ≤ 0.01), and MDA also increased the concentration of ammonia (P = 0.003). Besides, increasing MDA supplementation linearly reduced the acetate to propionate ratio and molar proportion of n-butyrate (P = 0.01), but linearly and quadratically increased the concentration of ammonia (P ≥ 0.003). These results showed that the incorporation of MDA into a naturally moldy diet of Hu lambs yielded comparable results to the Solis product, with higher growth performance and nutrient digestibility but lower acetate to propionate ratio observed. In conclusion, including ≥ 1 kg/t of MDA in high mycotoxin risk diets for growing lambs improves feed intake and rumen fermentation.

中文翻译：

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使用混合维凹凸棒石粘土吸附天然存在的霉菌毒素，改善羔羊的采食量和瘤胃发酵

本实验旨在评估将混合维凹凸棒石粘土 (MDA) 添加到胡羔羊自然发霉饲料中的效果。将 50 只具有相似初始体重（28.24 ± 1.80 kg）的雄性湖羔羊随机分配到 5 种日粮处理中：含有 0、0.5、1.0 和 2.0 kg/t MDA 的天然霉菌毒素的基础日粮，以及含有商品化饲料的基础日粮。以蒙脱石为主要成分的霉菌毒素吸附剂SolisTM，用量1kg/t。 MDA 和 Solis 均增加了平均日增重 (ADG) 和干物质摄入量 (DMI) (P ≤ 0.004)，且 MDA 和 Solis 的生长性能没有差异 (P ≥ 0.26)。最终体重、DMI和ADG随着MDA补充量的增加而线性增加（P＜0.01）。与对照组相比，同时使用 MDA 和 Solis 处理的羔羊表现出更高的干物质 (DM)、有机物 (OM) 和能量表观消化率 (P ≤ 0.03)，并且 MDA 和 Solis 之间的养分消化率没有差异。 P≥0.38）。 CP 的消化率随着 MDA 补充量的增加呈线性增加（P = 0.01）。 MDA和Solis均不影响瘤胃总挥发性脂肪酸（TVFA）浓度（P≥0.39），但降低了乙酸与丙酸的比例和正丁酸的摩尔比例（P≤0.01），MDA还增加了氨的浓度（P≤0.01）。 = 0.003）。此外，增加MDA的添加量线性地降低了乙酸与丙酸的比率和正丁酸的摩尔比例（P = 0.01），但线性和平方地增加了氨的浓度（P≥0.003）。这些结果表明，将 MDA 掺入胡羔羊的自然发霉日粮中，产生了与 Solis 产品相当的结果，具有更高的生长性能和养分消化率，但观察到乙酸与丙酸的比率较低。总之，在生长羔羊的高霉菌毒素风险日粮中添加 ≥ 1 kg/t MDA 可改善采食量和瘤胃发酵。