Estimation of Energy and Protein Status in Dairy Cows on the Basis Changes of Fat, Protein and Urea Contents in the Milk
Procena energetskog i proteinskog statusa mlečnih krava na osnovu sadržaja proteina, masti i uree u mleku
dc.contributor.author | Djokovic, Radojica | |
dc.contributor.author | Cincovic, Marko | |
dc.contributor.author | Ilic, Zoran | |
dc.contributor.author | Kurcubic, Vladimir | |
dc.contributor.author | Petrovic, Milun | |
dc.contributor.author | Doskovic, Vladimir | |
dc.contributor.author | Petrovic, Milos | |
dc.date.accessioned | 2017-06-28T20:37:03Z | |
dc.date.available | 2017-06-28T20:37:03Z | |
dc.identifier.uri | http://arhiva.nara.ac.rs/handle/123456789/2209 | |
dc.description.abstract | The objective of this study was to determine energy and protein status of dairzu cows on the basis changes of fat, protein and urea contents in milk. The experimental cows were assigned to three groups: Group 1 (n=12) including clinically healthy in the start lactation (7±3) days after calving , Group 2 (n=12) comprising clinically healthy cows in the early lactation (22±15) days after calving and Group 3 (n=12) made up of clinically healthy mid lactation cows (133±75) days of lactation. Milk samples were collected from all experimental cows. Milk samples were analysed for fat, protein and urea to estimate energy and protein status in the cows. In the groups cows in early lactation diet was adequate supplied with energy, but with sufficit in the protein.The cows are under state of strong negative energy balance. In the group of cows in mid lactation diet was optimal with energy, but with suficit in the protein.The cows were in mild negative energy billance. Estimation energy and protein status on the basis the changes of fat, proten and urea contents in the milk can be the efficiently diagnostic method in the farms of dairy cows, | sr |
dc.description.abstract | Cilj ovog rada je bio da se odredi energetski i proteinski status krava rase Holštajn na osnovu promena vrednosti koncentracija masti, uree i proteina u mleku tokom postpartalnog perioda i pune laktacije. Životinje su svrstane u tri grupe. U prvoj grupi (Grupa 1, n=12),) nalazile su se klinički zdrave krave na samom početku laktacije, kod kojih je mleko uzorkovano u periodu (7±3) dana posle teljenja. U drugoj grupi (Grupa 2 , n =12), su bile klinički zdrave krave kod kojih je mleko uzorkovano u periodu od 10 do 30 dana posle teljenja (22±15 dana), dok su u trećoj grupi (Grupa 3, n=12), bile klinički zdrave u punoj laktaciji i to u periodu od 90 do 150 dana laktacije (133± 75 dana). Iz uzorkovanog mleka određivane su koncentracije masti, proteina i uree. Na osnovu promena vrednosti masti, proteina i uree u mleku i njihovog međusobnog odnosa utvrđivan je energetski i proteinski status kod mlečnih krava. Kod grupa krava na početku laktacije na osnovu sastava mleka može se zaključiti da je obrok bio optimalno snabdeven sa energijom, ali postoji suficit proteina. Krave se nalaze u stanju izraženog negativnog bilansa energije. Kod grupe krave u punoj laktaciji obrok je bio optimalno snabdeven sa energijom, ali postoji suficit proteina. Krave se nalaze u stanju blagog negativnog bilansa energije. Procena energetskog i proteinskog statusa mlečnih krava na osnovu promena vrednosti masti, proteina i uree u mleku i njihovog međusobnog odnosa predstavlja pouzdanu i jeftinu i lako primenjivu dijagnostičku metodu na farmamam mlečnih krava. | sr |
dc.subject | cows | sr |
dc.subject | milk | sr |
dc.subject | fat | sr |
dc.subject | protein | sr |
dc.subject | urea | sr |
dc.subject | krave | sr |
dc.subject | mleko | sr |
dc.subject | masti | sr |
dc.subject | proteini | sr |
dc.subject | urea | sr |
dc.title | Estimation of Energy and Protein Status in Dairy Cows on the Basis Changes of Fat, Protein and Urea Contents in the Milk | sr |
dc.title.alternative | Procena energetskog i proteinskog statusa mlečnih krava na osnovu sadržaja proteina, masti i uree u mleku | sr |