MEAT PRODUCTION BY STEERS OF DIFFERENT GEOTYPES
2018
& et al., Velmatov
The objective of this study to investigate meat production by steers of different genotypes. In order to study the productivity of Simmental and black and white Simmental x Holstein cross bred, steers, six groups of bull-calves with 15 animals each, were formed. The first group consisted of Simmental steers, the second group (3/8) blooded, the third group (1/2) blooded, the fourth group (5/8) blooded, the fifth group (3/4) blooded and the sixth group (7/8) blooded Holstein steers respectively. Under the same conditions of feeding and maintenance purebred Simmental animals grow more intensively. At 18-months of age they exceed (3/8) Holstein blooded bull calves by 6.2 kg, half blooded by 16.5 kg, (5/8) blooded by 18.4 kg, (3/4) blooded by 25 kg and (7/8) blooded by 35.2 kg (Р <0,001). The slaughter weight of Simmental bulls surpass their counterparts by 7.4-24.8 kg. Significant differences were observed (p < 0.001) between Simmental and crossed bull-calves having in their genotype 75.0-87.5% of Holsteins blood were observed. The same level of reliability (P <0.01) was indicated in the mass of internal fat and slaughtered yield. The specific gravity of flesh in bull calves carcass of all studied groups varied within the limits of 78.7-80.6%.The mass of the flesh of Simmental bulls was higher than hybrid animals by 4.0-12.0 kg.The fat content in meat of Simmental bull calves is 9.10%, that is 1,86-2,31% more than hybrid steers. Concerning to the protein content, the crossed bulls exceeded the Simmental ones by 0.10-0.39%.
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