Instituto Nacional de Investigação Agrária e Veterinária I.P. (INIAV), Fonte-Boa, 2005-048 Vale de Santarém, Portugal; Centro de Investigação Interdisciplinar em Sanidade Animal, Avenida da Universidade Técnica, Lisboa, Portugal.
Instituto Nacional de Investigação Agrária e Veterinária I.P. (INIAV), Fonte-Boa, 2005-048 Vale de Santarém, Portugal; Centro de Investigação Interdisciplinar em Sanidade Animal, Avenida da Universidade Técnica, Lisboa, Portugal.
Meat Sci. 2022 Jun;188:108782. doi: 10.1016/j.meatsci.2022.108782. Epub 2022 Mar 1.
Thirty-two bulls were assigned to four total mixed biodiverse haylage-based diets to evaluate the effects of partial substitution of grains by agroindustrial byproducts, sunflower seeds (SS) supplementation and haylage level on growth, in vitro methane production and carcass and meat quality. Dietary treatments included a grain-based diet with 30% grain and haylage:concentrate ratio (H:C) of 60:40 (DM basis) (MCe); a by-product-based diet where 50% of the grain was substituted for by-products (H:C, 60:40) (MBp); a byproducts diet with 10% sunflower seed and 90% (DM) MBp (H:C, 54:46) (MBpSS); and a byproducts, SS diet with increased haylage (H:C, 67.5:32.5) (HBpSS). Dry matter intake and growth rate were lower in HBpSS, but feed conversion ratio was unaffected by diet. In vitro methane emissions were reduced by SS. Meat colour and shear force were similar among diets. Lipid oxidation in cooked meat was reduced and fatty acid composition was improved with SS. Biodiverse haylage-based diets may be a viable option for finishing bulls.
三十二头公牛被分配到四种完全混合的生物多样性青贮饲料日粮中，以评估部分用农业副产品替代谷物、补充葵花籽 (SS) 和青贮饲料水平对生长、体外甲烷生成以及胴体和肉质的影响。日粮处理包括一种基于谷物的日粮，其中 30%的谷物和青贮饲料：浓缩物比例（DM 基础）为 60:40（MCe）；一种副产品基础日粮，其中 50%的谷物被副产品替代（H:C，60:40）（MBp）；一种含有 10%葵花籽和 90%（DM）MBp 的副产品日粮（H:C，54:46）（MBpSS）；以及一种含有更多青贮饲料的副产品、SS 日粮（H:C，67.5:32.5）（HBpSS）。HBpSS 组的干物质摄入量和生长速度较低，但日粮对饲料转化率没有影响。SS 降低了体外甲烷排放。日粮之间的肉色和剪切力相似。用 SS 处理可降低熟肉中的脂质氧化并改善脂肪酸组成。基于生物多样性青贮饲料的日粮可能是育肥牛的一种可行选择。
