Application of the system Clarc of energy distribution/protein transformation in dairy sheep farming - methodological setting and methods of calculation
Dimo Penkov, Milena Mihaylova, Gancho Ganchev
Abstract: The article proposes a methodology for introducing objective criteria for accounting for the net utilization of energy and protein (amino acids) along the chain "forage consumed by sheep/goats - obtained sheep/goat milk." Adapted for dairy sheep/goats are the calculations of the introduced criteria Clarc of energy distribution and Clarc of protein (amino acid) transformation.
The authors believe that the introduction of the methodology and the calculations based on it, will help to refine the scientific research in 3 aspects: selection, technological and ecological.
Keywords: Clarc of energy distribution; Clarc of protein transformation; dairy sheep farming
Citation: Penkov, D., Mihaylova, M. & Ganchev, G. (2024). Application of the system “Clarc of energy distribution/protein transformation” in dairy sheep farming - methodological setting and methods of calculation. Bulgarian Journal of Animal Husbandry, 61(6), 3-7 (Bg).
| References: (click to open/close) | AOAC international (2007) Official methods of analysis of AOAC (18 edition,rev. 2), Association of Official Analytical Chemists Intern., Gaithersburg, MD, USA.
Barillet, F., Astrug, J. M., de Brauwer, P., Casu, S., Fabbri, G., Federsen, E., Frangos, K., Gabina, D., Gama, L. T., Ruiz Tena, J. L. & Sana, S.(1992) International regulation for milk recording in sheep. ICAR publication.
Dimov, D., Zhelyazkova, P. & Vuchkov, A. (2017) Study on the loss of accuracy of AC-method for milk yield control in sheep. Agric. Sci. and Techn., 9(4), 268 – 272. DOI: 10.15547/ast.2017.04.050.
Iliev, M., Staykova, G. & Tsonev, T. (2022). Dynamics of the selection traits milk yield and fertility in sheep from the Bulgarian dairy synthetic population. Zhivotnovadni Nauki, 59(2), 3-9.
NRC (2008) Nutrient requirements of small ruminants, National research council of national academies. ISBN: 13: 978-0-309-47323-1.
Penkov, D. (2021) A new approach for assessing energy and protein transformation in the “feed -edible animal products” chain, calculation methodology and data for it’s application, Monograph, Acad. Publ. House of AU – Plovdiv. ISBN 9789545173080.
Penkov, D. & Genchev, A. (2018), Methods for introduction of objective criteria for bioconversion of energy and nutrients along the feed–animal products chain in meet-type poultry farming. J. Сentr. Еurop. Аgric.,19(2), 270-278.
Penkov, D. & Vuchkov, A. (2020) Net utilization of energy and protein by traditional reared Bulgarian Screw-hornet Longhaired sucking kids through the system “Clarc of energy distribution/Clarc of protein transformation”. Journal of mountain agriculture on the Balkans, 23(2), 1-10. ISSN: 23678364.
Pirgozliev, V. & Rose, S. P. (1999) Net energy systems for poultry feeds: a quantitative review. World's Poultry Science Journal, 55(1), 23-36. https://doi.org/10.1079/WPS19990003.
Schiemann, R., Nierig, K., Hoffmann, L., Jentsch, W. & Chudy, A. (1971) Energetische Fuetterung und Energienormen. VEB Deutscher Landwirtschaftsverlag, Berlin.
Shindarska, Z. (1989) Effect of different energy and protein levels of ratio on energy and protein deposition in the carcass of fattened lambs, PhD – Thesis, Kostinbrod, 214.
Todorov, N. & Dardjonov, T. (1995) Nutrient requirements for sheep and goats, NIZ-UZVM Stara Zagora. ISBN 9548180383.
Todorov, N., Krachunov, I., Djuvinov, D. & Alexandrov, A. (2007) Reference book of animal nutrition,Matcom, Sofia. ISBN 9789549930474.
Vuchkov, А. & Penkov, D. (2024) NET Utilization of Energy and Protein of a Local Sakar Lambs in Traditional Farming Technology to the Weaning at 60 Days of Age. J. of Mount. Agric. on the Balkans, 27(2), 21-34. ISSN 2367-8364 (Online). |
|
| Date published: 2024-12-16
Download full text 
