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Title:Prireja mleka bikovskih mater na konvencionalni kmetiji
Authors:ID Koler, Katja (Author)
ID JANŽEKOVIČ, Marjan (Mentor) More about this mentor... New window
Files:.pdf VS_Koler_Katja_2011.pdf (488,11 KB)
MD5: EA9DDA4B387C77F585D11028B6264DF7
PID: 20.500.12556/dkum/235ce87b-1918-4881-9abf-dbd0f8cadc57
 
Language:Slovenian
Work type:Undergraduate thesis
Organization:FKBV - Faculty of Agriculture and Life Sciences
Abstract:Analizirali smo rezultate kontrole prireje mleka na družinski kmetiji s statusom reje bikovskih mater v obdobju 16 let, in sicer od leta 1994 do 2010. Vključene so bile tri generacije krav molznic lisaste pasme s standardno laktacijo. V prvi generaciji so bile odbrane bikovske matere in potencialne bikovske matere, v drugi generaciji potomke krav iz prve generacije in v tretji generaciji potomke krav iz druge generacije. Ugotavljali smo, ali lahko na osnovi rejskega cilja in selekcijskega napredka pričakujemo, da bodo potomke bikovskih mater imele enake oziroma boljše proizvodne parametre. Povprečna količina prirejenega mleka v standardni laktaciji je pri prvi generaciji znašala 6458 ± 671 kg. Povprečje maščob v mleku je pri prvi generaciji znašalo 4,01 ± 0,45 %, pri beljakovinah pa je bilo 3,49 ± 0,46 %. V enakem obdobju je v Sloveniji pri lisasti pasmi znašalo povprečje proizvedenega mleka 4586 kg mleka, kar nam pove, da smo imeli pri vseh treh generacijah večjo količino mleka, in sicer 5905 kg. Slovensko povprečje maščob v mleku je v enakem obdobju znašalo 4,12 %. Glede na rezultate smo tako prišli do zaključka, da je povprečje maščob pri generacijah enako slovenskemu povprečju. Ravno nasprotno pa se je pokazalo pri beljakovinah, ki so presegle slovensko povprečje. Beljakovine so pri generacijah v povprečju znašale 3,47 %, medtem ko je slovensko povprečje beljakovin pri lisasti pasmi znašalo 3,32 %. Povprečna količina mleka je bila pri vseh treh generacijah višja za 22,33 % od slovenskega povprečja lisaste pasme v obdobju od 1994 do 2010. Skupno povprečje maščob v mleku je bilo enako kot pri slovenskem povprečju za lisasto pasmo. V odstotkih beljakovin, je razlika povprečja vseh treh generacij v standardni laktaciji s slovensko lisasto pasmo presegala za 4,3 %. Po obravnavi vseh podatkov smo tako ugotovili, statistično značilno razliko (p<0,05) v količini mleka med prvo in drugo generacijo (p=0,054). Statistično značilne razlike (p<0,05) med generacijami v maščobah in beljakovinah v standardni laktaciji pa nismo ugotovili, saj se prva generacija statistično ne razlikuje od druge in tretje generacije. Na podlagi vseh dobljenih podatkov tako zaključujemo, da povprečni rezultati vseh treh generacij krav molznic v standardni laktaciji dosegajo rejski cilj za lisasto pasmo in presegajo slovensko povprečje proizvodnje mleka za lisasto pasmo.
Keywords:prireja mleka, bikovske matere, selekcija
Place of publishing:Maribor
Year of publishing:2011
PID:20.500.12556/DKUM-20805 New window
NUK URN:URN:SI:UM:DK:ZXOLDMG1
Publication date in DKUM:13.10.2011
Views:2604
Downloads:229
Metadata:XML DC-XML DC-RDF
Categories:FKBV
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Secondary language

Language:English
Title:Milk production of bull-dams on a conventional farm
Abstract:We analyzed the results of milk production control on a family farm having the status of breeding bull-dams within the period of 16 years, from 1994 to 2010. We included three generations of dairy cows, Simmental breed, in standard lactation. In the first generation there were selected bull-dams and potential bull-dams, in second generation there were descendants of cows from the first generation and in third generation there were descendants of cows from the second generation. Based on breeding objective and selection progress, we tried to establish whether we can expect the descendants of bull-dams to have equal or better performance parameters. Average quantity of milk produced in standard lactation amounted to 6,458 ± 671 kg in the first generation. Average fat content in milk in the first generation was 4.01 ± 0.45 % and the protein average was 3.49 ± 0.46 %. During the same period, the Slovenian average of produced milk for Simmental breed was 4,586 kg, which means that we had higher quantity of milk in all three generations, that is, 5,905 kg, while the Slovenian average of fat content in milk amounted to 4.12 %. According to the results, we could conclude that the average fat content in milk in all three generations was the same as the Slovenian average. On the contrary, the proteins exceeded the Slovenian average. In all three generations, the average of proteins was 3.47 %, while the Slovenian protein average for Simmental breed was 3.32 %. Average quantity of milk was in all three generations 22.33 % higher than the Slovenian average for Simmental breed within the period from 1994 to 2010. The total average of fats in milk was equal to the Slovenian average for Simmental breed. The difference in proteins in all three generations of Simmental breed with standard lactation exceeded the Slovenian average by 4.3 %. After examining all the data, we found the statistically significant difference (p<0.05) in the quantity of milk between the first and the second generation (p = 0.054). We didn't find statistically significant differences (p<0.05) between the generations in relation to the content of fats and proteins as the first generation doesn't differ statistically from the second or third generation. Based on all the obtained data, we conclude that the average results for all three generations of dairy cows in standard lactation attain the breeding objective for Simmental breed and exceed the Slovenian average of milk production for Simmental breed.
Keywords:milk production, bull-dams, selection


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