Carcass characteristics of steers of different genetic predominance fed diets containing levels of substitution of corn grain by millet grain

被引:0
|
作者
da Silva, Rodrigo Medeiros [1 ]
Restle, Joao [2 ]
Missio, Regis Luis [3 ]
Bilego, Ubirajara Oliveira [4 ]
Pacheco, Paulo Santana [5 ]
de Paula Rezende, Pedro Leonardo [6 ]
de Resende Fernandes, Juliano Jose [7 ]
Goncalves da Silva, Alexey Heronville [6 ]
Padua, Joao Teodoro [7 ]
机构
[1] UEG, Sao Luis De Montes Belos, Go, Brazil
[2] UFT, Fundacao Univ Fed Tocantins, Araguaina, TO, Brazil
[3] UTFPR, Dept Agron, Pato Branco, PR, Brazil
[4] Cooperat Agroind Prod Rurais Sudo, Rio Verde, Go, Brazil
[5] Univ Fed Santa Maria, Dept Zootecnia, Santa Maria, RS, Brazil
[6] Univ Fed Goias, Programa Posgrad Ciencia Anim, Goiania, Go, Brazil
[7] Univ Fed Goias, Dept Prod Anim, Goiania, Go, Brazil
来源
SEMINA-CIENCIAS AGRARIAS | 2015年 / 36卷 / 02期
关键词
Aberdeen Angus; carcass weight; Nellore; pistol cut; subcutaneous fat; MEAT CHARACTERISTICS; YOUNG STEERS; CHAROLAIS STEERS; DETERGENT FIBER; EMPTY BODY; TRAITS; FEEDLOT; CATTLE; COMPONENTS; BREED;
D O I
10.5433/1679-0359.2015v36n2p943
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
This study aimed to assess the carcass characteristics of European crossbred young bulls or Zebu feedlot finished with diets with high percentage of concentrate (80%) containing different levels of pearl millet grain as replacement for corn grain (0, 33, 66 and 100%). Forty-five young bulls with genotype predominance of Aberdeen Angus and forty-four young bulls with genotype predominance Nellore with average initial weight of 317.8 and 320.7 kg, respectively, and average age of 21 month, were allocated in 16 collective pens. At the end of the finishing period were slaughtered six animals of each genetic group, chosen according to the body weight and degree of finishing each treatment. The experimental design was the completely randomized design with treatments in a 4x2 factorial arrangement using six replicates. The replacement of corn grain by millet grain did not significantly influence slaughter weight (480.4 kg), hot carcass weight (259.5 kg), carcass yield (54.1%) and subcutaneous fat thickness (3.95 mm). Young bulls with genotype predominance of Aberdeen Angus showed significantly higher values for slaughter weight (507.6 vs. 453.3 kg), hot carcass weight (269.6 vs. 249.3 kg) and longissimus dorsi area (65.34 vs 56.83 cm(2)), however, were lower in carcass yield (53.2 vs. 55.0%). Millet grain can be used in substitution to corn grain for finishing steers since it does not change carcass traits of economic interest.
引用
收藏
页码:943 / 959
页数:17
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