Dažāda vecuma Latvijas tumšgalves tīršķirnes jēru nobarošanas rezultātu analīze | [Analysis of the fattening results of different age Latvian Blackhead purebred lamb]
2016
Kairisa, D., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture | Barzdina, D., Latvia Univ. of Agriculture, Jelgava (Latvia). Faculty of Agriculture
In Europe, including Latvia, issues of high – quality production become more and more significant. Therefore, many research institutions around the world are engaged in research of meat quality of different breeds and the factors affecting it. Currently the market research shows that there is lack of mutton in the European Union (EU), therefore EU has to look for opportunities to produce more. The aim of Latvian sheep breeding specialists is to create a sustainable sheep breeding and processing sector which is able to produce high – quality, competitive products for domestic and foreign markets. The aim of research was to find out fattening efficiency of the Latvian Blackhead breed lambs of different age. A study was done with 27 Latvian purebred male lambs. Before slaughter of lambs the measurements of muscle tissue and fat tissue layer depth were carried out with ultrasonic scanner. After slaughter, weighing of lamb carcasses, evaluation of muscle development and fat tissue layering following SEUROP classifications was carried out. Starting the feeding, average age of lambs in research groups was 92.3 days and the average live weight – 27.9 kg. Average weight gain of lambs during fattening was 367.4 g per day. The average age of lambs before the slaughter was 162.1 days, that is to say 5.4 months. The average live weight of the fattened lambs before slaughter was 50.4 kg. Longissimus Dorsi muscle and fat thickness depth measurements carried out with the ultrasonic scanner were, respectively, 26.3 mm and 4.1 mm. Visual assessment of the carcass showed even muscular development, and average score of the groups were from 2.7 to 2.9.
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