INVESTIGATION OF THE LEVEL OF MILK PRODUCTION UPON REPRODUCTIVE CAPACITY OF BLACK-AND-WHITE COWS AND COMPLEX ESTIMATION OF CATTLE BREEDING FARM | Проучване влиянието на нивото на млечната продуктивност върху репродуктивните способности на крави и комплексната оценка на говедовъдни ферми
2011
Gajdarska, V., Institute of Animal Science, Kostinbrod (Bulgaria) | Ivanova, T., Agricultural Institute, Shumen (Bulgaria) | Kharizanova, Ts., Institute of Animal Science, Kostinbrod (Bulgaria) | Stojkov, P., Complex Experimental Station, Vidin (Bulgaria)
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 Rusevs 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.
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