Department of Animal Science, Federal University of Paraíba, Areia, Paraíba, Brazil.
Brazilian Agricultural Research Corporation, EMBRAPA Semiarid, Petrolina, Pernambuco, Brazil.
Sci Rep. 2020 Apr 22;10(1):6834. doi: 10.1038/s41598-020-63905-9.
The present study aimed to evaluate the chemical composition, profile and fermentative losses, microbial population and the aerobic stability of mixed silages of cactus pear and gliricidia. The treatments corresponded to the addition levels of gliricidia (Gliricidia sepium (Jacq.) Steud), in the silages of cactus pear (Opuntia ficus indica Mill.), at ratios 0%, 25%, 50%, 75% and 100% gliricidia. The data were subjected to analysis of variance and regression to evaluate the effect of the addition levels of gliricidia. The average related to the opening days were compared by the Tukey's test and the average hours of exposure to air were compared by the Student's t-test. The addition of gliricidia in cactus pear silage provided a linear increasing effect for pH, crude protein (CP), neutral detergent fibre (NDF), acid detergent fibre (ADF), acid detergent lignin (ADL), neutral detergent insoluble protein (NDIP), and increased aerobic stability (AS). The highest dry matter recovery was estimated in the silages with 58% gliricidia. Based on the fermentative, chemical composition and silage losses, all the silages tested were adequate. However, considering aerobic stability, the addition of at least 25% gliricidia is recommended to provide the animal a feed with important quality and high nutritional value.
本研究旨在评估仙人掌和银合欢混合青贮的化学成分、组成和发酵损失、微生物种群以及好氧稳定性。处理对应于银合欢（Gliricidia sepium（Jacq.）Steud）在仙人掌青贮中的添加水平，比例为 0%、25%、50%、75%和 100%的银合欢。数据通过方差分析和回归进行分析，以评估银合欢添加水平的影响。通过 Tukey 检验比较与开窖天数相关的平均值，通过学生 t 检验比较暴露于空气的平均小时数。在仙人掌青贮中添加银合欢为 pH 值、粗蛋白（CP）、中性洗涤剂纤维（NDF）、酸性洗涤剂纤维（ADF）、酸性洗涤剂木质素（ADL）、中性洗涤剂不溶性蛋白（NDIP）提供了线性增加的效果，并提高了好氧稳定性（AS）。在含有 58%银合欢的青贮中估计获得了最高的干物质回收率。基于发酵、化学成分和青贮损失，所有测试的青贮都是合适的。然而，考虑到好氧稳定性，建议添加至少 25%的银合欢，以提供动物具有重要质量和高营养价值的饲料。
