INVESTIGATION OF THE LEVEL OF MILK PRODUCTION UPON REPRODUCTIVE CAPACITY OF BLACK-AND-WHITE COWS AND COMPLEX ESTIMATION OF CATTLE BREEDING FARM
Keywords:
ball assessment, cattle breeding, complex estimation, cows milk, different farms, economy, management, productivityAbstract
The goals of this study were to estimate dairy farms and investigate of the level of milk productivity upon reproductive capacity of the cattle-breeding farms-100 with different capacity, generally 10791 cows, from the Bulgarian Dairy Black and White breed. The 100 cattle breeding farms were inquired and the number of cows (І, ІІ, ІІІ and ІV) groups. Data for the study were gathered according to Rusev's methodology. The study involved the period from 2004 to 2009 year. The highest average estimation according to the investigated indicators was got in farms with 51-500 cows. The estimation of milk productivity, reproductive traits, open days, health and hygiene, feeding, management, and economics of the farms was performed on the basis of the statistical analyses. The average value of the milk production of cows from the investigated farms varies from 3600 kg to 7400 kg. The study is a part of larger research project, connected to dairy farms in Bulgaria.
References
Гайдарска, В. М., 2009. Влияние молочной продуктивности на репродуктивные признаки и комплексную оценку черно-пестрых коров. Материалы международной научной конференции ВНИИГРЖ, Част І. 9-11 июня, стр. 68-71.
Прохоренко, П. Н., 2007. Современные методы генетики и селекции. Материалы международной научной конференции ВНИИГРЖ 26-28 юни, РАСН.стр. 3-6.
Прохоренко, П. Н, А. В. Егиазарян, 2009. Вклад проффесора М. М. Лебедева в теорию и практику разведения и селекции сельскохозяйственных животних. Материалы международной научной конференции ВНИИГРЖ , Част І. 9-11 июня, стр. 3-7.
Русев, Н., 2003. Методика за проучване и оценка на млечни ферми с различен размер на стадата, Животновъдни науки, 3-4, стр. 7-9.
Русев, Н., В. Гайдарска, Ц. Харизанова, 2008. Проучване и комплексна оценка на говедовъдни ферми с различен капацитет. ЛТУ, Сборник доклади от научна конференция, 54-62. София.
Русев, Н., В. М. Гайдарска, 2008. Проучване и комплексна оценка на говедовъдни ферми с различен капацитет, Животноводни науки, 3, стр.22-28.
Сакса, Е. И., 2007. Селекционно-генетические методы при совершенствовании скота черно-пестрой породы. Материалы международной научной конференции, Санкт Петербург, 37-43.
Харизанова, Ц., 2008. Възвращаемост и риск на инвестициите в животновъдството. Дисертационен труд за присаждане на образователна и научна степен "Доктор" стр. 214.
Lucy, M. C., 2000. Reproductive Loss in High-Producing Dairy Cattle: Were Will it End? J. Dairy Sci. 84: 1277-1293.
Lucy, M. C., 2001. Reproductive Loss in High-Producing Dairy Cattle: Were Will it End? J. Dairy Sci. 2002, N. 84: P1269- 1277.
Lucy, M. C, W. G. Weber, L. H. Baumherd, B. S. Seguin, A. T. Koenigsfield, L. B. or T. 2004: Improvements made to PTAT calculations, Stability of Proofs, Research Holstein Association USA.
Nebel, R. L. and M. L. McGiliard., 1993. Interactions of high milk yield and reproductive performance in dairy cows. J. Dairy Sci., N.76: P.3257-3268.
Pursley, J. R., R. W. Silcox, and M. C. Wiltbank, 1998, Effect of time of artificial insemination on pregnancy rates, calving rates, pregnancy loss, and gender ratio after synchronization of ovulation in lactating dairy cows. J. Dairy Sci. N. 81: P.2139-2144.
Roche, J. F., D. Mackey, and M. Dickin., 2000. Reproductive management of postpartum cows. Anim. Reprod. Sci.. N. 60-61: P.703- 712.
Mark, T., J. H. Jakobsen, H. Jorjani, W. F. Fikse and J. Philipsson., 2005. International Trends in Recording and Genetic Evaluation of Functional traits in Dairy Cattle. Interbull Centre, SLU, N. 7023, P.750- 757 Uppsala, Sweden.
Downloads
Published
Issue
Section
Categories
License
Copyright (c) 2011 Bulgarian Journal of Animal Husbandry
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.
