摘要
The objective of this study was to investigate the effects of supplementation of hydrolyzable tannins (HT) from sweet chestnut wood extract (Castanea sativa Mill.) to the diet of Limousin bulls on growth rate, carcass and meat quality traits, and fecal Clostridia strain levels in a 7-month feeding trial. Thirty-two bulls were randomly assigned to four treatment groups (CON (without addition of HT); TAN 1 (1 g HT kg−1 DM); TAN 2 (1.5 g HT kg−1 DM); and TAN 3 (1.5 g HT kg−1 DM with a nominally lower dose of concentrate). Compared with the CON group, supplementation with HT significantly (p < 0.050) increased bull growth rate during 4–7 months, whereas carcass and meat quality traits were unaffected during the last three months of fattening. Supplementation of HT significantly reduced meat drip loss (p = 0.000) compared with the CON group. No effects were observed on the total number of fecal Clostridia strains; however, the concentration of Clostridiumperfringens was significantly lower (p = 0.004) in TAN 1 than that in the CON group. The results obtained in fattening bulls indicate that the addition of HT is justified in practice to improve growth performance and feed efficiency without adverse effects on the carcass and meat quality.
摘要译文
这项研究的目的是调查可水解单宁（HT）从甜栗子木材提取物（Castanea sativa Mill。）到Limousin Bulls饮食对生长速率，car体和肉质特质的影响在7个月的喂养试验中。将32枚公牛随机分配到四个治疗组（con（不加HT）； tan 1（1 g ht kg-1 dm）； tan 2（1.5 g ht kg-1 dm）; tan 3（1.5 g（1.5 g） HT kg -1 dm名称浓缩剂的剂量较低）。与CON组相比，在4-7个月内补充HT（p <0.050），牛公牛的生长速率增加，而在最后一次，car体和肉质性状不受影响与CON组相比，HT的补充三个月。补充HT可显着降低肉滴损失（P = 0.000）。未观察到对粪便总梭状杆菌菌株总数的影响；但是，梭状芽胞杆菌的浓度显着降低（P = 0.0044 ）在tan 1中，比在骗局组中。在肥大公牛中获得的结果表明，在实践中，HT的添加是合理的，可以提高生长性能和饲料效率，而不会对car体和肉质质量产生不利影响。
Andrej MergedušMarjan JanžekovičDejan Škorjanc;Tadeja Kraner Šumenjak;Maksimiljan Brus. Growth Performance, Meat Quality, and Fecal Microbial Population in Limousin Bulls Supplemented with Hydrolyzable Tannins[J]. Agriculture, 2022,12(7): 939