Biserra Thiago Trento, Cecato Ulysses, Galbeiro Sandra, Bridi Ana Maria, Fernandes Henrique Jorge, Duarte Camila Fernandes Domingues, Da Silva Diogo Rodrigues, Vicente João Vitor Rosa, Rogel Camila Piechnicki
Departamento de Zootecnia, Universidade Estadual de Maringá. UEM, Avenida Colombo, n. 5790, Maringá, Paraná, 87020-900, Brazil.
Departamento de Zootecnia, Universidade Estadual de Londrina, UEL, Rodovia Celso Garcia Cid - Pr 445 Km 380, Londrina, Paraná, 86057-970, Brazil.
Trop Anim Health Prod. 2020 Mar;52(2):625-635. doi: 10.1007/s11250-019-02050-6. Epub 2019 Aug 30.
Carcass characteristic and meat quality from bulls and Nellore steers (n = 64 total) subjected to different grazing heights (15, 25, 35, and 45 cm) were evaluated isolatedly, under continuous grazing and variable load, in pastures of Convert grass. The experimental period was from May 2015 to June 2017, in an area of 16 ha, divided into 16 paddocks of 1 ha. The experimental design was randomized blocks with four replications. Each paddock was grazed by three animals and regulators, used to adjust grazing heights. The final slaughter weight, hot carcass, and crude protein in the meat of steers were higher when the pastures were managed at 42 cm. When the pasture was managed between 25 and 35 cm in height, greater fat thickness, marbling, muscle:bone and muscle+fat:bone ratio and lower color* of the meat and percentage of bone were found. For the steers, the height of 40 cm provided higher fat thickness and marbling in the meat. The loss during thawing in meat was greater at 28 cm in height. The heights of grazing alter the carcass characteristics and meat of bulls and steers.
在持续放牧和可变载畜量条件下，对64头公牛和内罗尔阉牛在康弗特草牧场中分别进行不同放牧高度（15、25、35和45厘米）的试验，评估胴体特征和肉质。试验期为2015年5月至2017年6月，在16公顷的区域内，分为16个1公顷的围场。试验设计为随机区组，重复4次。每个围场由三头动物放牧，并使用调节器来调整放牧高度。当牧场管理高度为42厘米时，阉牛的最终屠宰体重、热胴体和肉中的粗蛋白含量更高。当牧场管理高度在25至35厘米之间时，发现脂肪厚度、大理石花纹、肌肉:骨骼和肌肉+脂肪:骨骼比例更大，肉的颜色*更低，骨的百分比更低。对于阉牛，40厘米的高度使肉中的脂肪厚度和大理石花纹更高。肉在28厘米高度时解冻损失更大。放牧高度会改变公牛和阉牛的胴体特征和肉质。
