Benito-Díaz Alberto, Sarmiento-García Ainhoa, García-García Juan José, Vieira Ceferina, Domínguez Esperanza, Bodas Rodríguez Raúl, Gómez-Gordo Luis, Vicente-Galindo Purificación
Línea de Investigación en Rumiantes, Instituto Tecnológico Agrario de Castilla y León, Valladolid, Spain.
Área de Producción Animal, Departamento de Construcción y Agronomía, Facultad de Agricultura y Ciencias Ambientales, Universidad de Salamanca, Salamanca, Spain.
Front Vet Sci. 2024 Aug 7;11:1416365. doi: 10.3389/fvets.2024.1416365. eCollection 2024.
Feeding local forages to ruminants is a promising strategy for enhancing metabolic processes, promoting sustainable farming, and improving product quality. However, studies comparing the effects of different forages on rumen histology and meat attributes of heifers are limited and variable.
This study evaluated the benefits of incorporating local forages into heifer diets by comparing barley straw (BS) and oat hay (OH) on heifer attributes focusing on meat quality (MQ) and rumen status (RS). Sixteen crossbred (Charolais x Limousin) female heifers (7 months of age, 263 ± 10.50 kg) were randomly assigned to two dietary treatments (BS or OH) over 120 days.
Heifers fed OH showed enhanced RS ( < 0.05), characterized by improved intestinal epithelial integrity and a lower percentage of hyperpigmented cells, suggesting a potential reduction in inflammatory processes compared to BS, which may indicate a lower risk of metabolic diseases. Despite this, no significant differences ( > 0.05) were found in animal performance, chemical composition, and technological properties of the meat between the dietary groups, while lower levels ( < 0.05) of certain saturated fatty acids (C12:0, C15:0, and C22:0) were found in the meat from heifers fed OH. Principal component analysis (PCA) reduced the variables and demonstrated that all variables assessed can be condensed into four new variables explaining 75.06% of the variability. Moreover, biplot analysis reveals that the OH diet could be discriminated from BS. Our findings suggest that OH is a valuable fiber source, positively influencing certain heifer attributes, and supporting sustainable animal agriculture practices.
给反刍动物投喂本地草料是增强代谢过程、促进可持续养殖以及提高产品质量的一项有前景的策略。然而，比较不同草料对小母牛瘤胃组织学和肉质影响的研究有限且结果不一。
本研究通过比较大麦秸秆（BS）和燕麦干草（OH）对小母牛肉质（MQ）和瘤胃状态（RS）的影响，评估了在小母牛日粮中添加本地草料的益处。16头杂交（夏洛莱×利木赞）雌性小母牛（7月龄，263±10.50千克）在120天内被随机分配到两种日粮处理组（BS或OH）。
饲喂OH的小母牛RS增强（P<0.05），其特征为肠道上皮完整性改善以及色素沉着过度细胞百分比降低，这表明与BS相比，炎症过程可能有所减轻，这可能意味着代谢疾病风险较低。尽管如此，日粮组之间在动物性能、肉的化学成分和工艺特性方面未发现显著差异（P>0.05），而饲喂OH的小母牛的肉中某些饱和脂肪酸（C12:0、C15:0和C22:0）含量较低（P<0.05）。主成分分析（PCA）减少了变量，并表明所有评估变量可浓缩为四个新变量，解释了75.06%的变异性。此外，双标图分析表明OH日粮可与BS区分开来。我们的研究结果表明，OH是一种有价值的纤维来源，对某些小母牛属性有积极影响，并支持可持续的动物农业实践。
