This study aimed to evaluate the fermentation profile and nutritional quality of silages composed of cactus pear and maniçoba. Two experiments were performed: the first evaluated the fermentation characteristics, chemical composition and determined the organic acids in cactus pear silages with the inclusion of five levels of maniçoba (0, 25, 50, 75 and 100%) in six opening times (1, 7, 15, 30, 60 and 90 days). The second experiment determined the nutrient intake, digestibility, water balance and nitrogen balance in Canindé goats fed diets based on cactus pear silage with the inclusion of four levels of maniçoba (25, 50, 75 and 100%), with six animals per treatment. The increase in maniçoba levels in cactus pear silage provided a linear increase in the butyric acid, dry matter (DM), ether extract, crude protein, neutral detergent fibre, acid detergent fibre, lignin, cellulose, hemicellulose, water intake via drinking fountain and metabolic water, and reduced the pH, lactic acid, acetic acid, mineral matter, total carbohydrates, non-fibrous carbohydrates, water intake via food, total water intake, water excreted in the faeces, water excreted in the urine, total water excretion and water balance. Quadratic behaviour was observed for N-NH3, DM recovery and propionic acid, with an increase in maniçoba levels in cactus pear silages. Regarding the different opening times, there was a significant effect in pH, N-NH3, acetic acid, lactic acid and butyric acid (P < 0.050). The inclusion of maniçoba in cactus pear silage improved the fermentation characteristics and nutritional quality to be used in diets for goats.

中文翻译：

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用于山羊饲喂的仙人掌梨和木薯青贮饲料的发酵概况和营养品质

本研究旨在评估由仙人掌梨和马尼苏巴组成的青贮饲料的发酵概况和营养品质。进行了两个实验：第一个是在六个开放时间（1、 7、15、30、60 和 90 天）。第二个实验确定了饲喂基于仙人掌梨青贮饲料的 Canindé 山羊的营养摄入量、消化率、水平衡和氮平衡，其中包括四个水平的 maniçoba（25、50、75 和 100%），每个处理六只动物。仙人掌梨青贮饲料中马尼苏巴含量的增加使丁酸、干物质 (DM)、醚提取物、粗蛋白、中性洗涤纤维、酸性洗涤纤维、木质素、纤维素、半纤维素、饮水机取水量和代谢水，降低pH值、乳酸、乙酸、矿物质、总碳水化合物、非纤维碳水化合物、食物取水量、总水摄入量，粪便中的水分、尿液中的水分、总水分排泄和水分平衡。观察到 N-NH 的二次行为3，干物质回收和丙酸，仙人掌梨青贮饲料中的马尼可巴含量增加。关于不同的开放时间，对 pH 值、N-NH 有显着影响3、乙酸、乳酸和丁酸（磷< 0.050)。在仙人掌梨青贮饲料中加入 maniçoba 可改善山羊饲料中的发酵特性和营养质量。