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    Wyświetlanie 1-4 z 4
    Tytuł:
    Influence of cattle breed and country of origin on milk yield and milk composition in dairy cows
    Wpływ rasy i kraju pochodzenia na wydajność i skład mleka krów mlecznych
    Autorzy:
    Kalińska, A.
    Slósarz, J.
    Gołębiewski, M.
    Wójcik, A.
    Przysucha, T.
    Kruzińska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082358.pdf
    Data publikacji:
    2019
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    cattle
    breed
    origin
    milk production
    Opis:
    Infl uence of cattle breed and country of origin on milk yield and milk composition in dairy cows. Dairy cattle breeding and milk industry are still signifi cant part of Polish agriculture industry. Polish farmers have valid positions in Europe and other parts of the world and cattle is their main source of income but also main species using grasslands in Poland. The main objective of the study was to determine the effect of: race, herd, country of origin and number of calving on milk production and milk composition of three dairy cattle breeds: Polish Holstein-Friesian, Polish Black and White, Simmental. Cows were kept on farms with milk performance recording system. Importance of each factor was assessed using one-way analysis of variance. Polish Holstein- Friesian breed achieved the highest daily milk yield (P < 0.01). The highest milk yield cows reached during the 3rd lactation. However, cattle imported from the Netherlands had higher (P < 0.01) milk yield, protein content and somatic cell count level comparing to cows from other countries. Presented data may suggest that breeders in the Netherland remove from herds cow more susceptible to mastitis. Farmers in Poland should consider breeds different than PHF e.g., SM if having large grasslands.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2019, 58[1]; 21-28
    1898-8830
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The impact of age at the first calving on lifetime milk yield, life span and herd life of dairy cows
    Wpływ wieku pierwszego ocielenia na wydajność życiową, długość życia i użytkowania krów mlecznych
    Autorzy:
    Kalińska, A.
    Slósarz, J.
    Gołębiewski, M.
    Wójcik, A.
    Przysucha, T.
    Kuzińska, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082422.pdf
    Data publikacji:
    2019
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    age of the fi rst calving
    milk yield
    herd life
    dairy cows
    Opis:
    The impact of age at the fi rst calving on lifetime milk yield, life span and herd life in dairy cows. The increasing importance of functional traits (e.g. longevity) in cattle breeding is the result of their direct effect on profi tability of production. The main objective of the study was to determine the infl uence of age of the fi rst calving on lifetime milk yield, life span and herd life in Polish dairy cows. Cows were kept on farms with milk performance recording system. One-way analysis of variance was used to calculate the impact of age of the fi rst calving on selected traits. Cows that fi rst calving occurred at the age of 791–850 day achieved the highest lifetime milk, fat and protein yield per one day of life (P ≤ 0.01). Moreover, their life span was also the longest (P ≤ 0.01) and milk and protein yield per 1 day of utilization were the highest (P ≤ 0.01). Obtained results suggest that the most favorable time of calving for dairy heifers is between 791–850 day of life. Therefore, milk producers should carefully consider the most suitable time of heifers insemination in order to achieve the most satisfying milk production.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2019, 58[3]; 215-221
    1898-8830
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis of genetic relatedness and inbreeding in Polish population of the Newfoundland dog breed
    Analiza spokrewnienia i inbredu psów rasy Nowofundland
    Autorzy:
    Kruzińska, B.
    Święcicka, N.
    Nowak-Życzyńska, Z.
    Boruta, A.
    Kalińska, A.
    Głowacka, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082346.pdf
    Data publikacji:
    2019
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    Newfoundland
    inbred
    ancestor loss
    Opis:
    Analysis of genetic relatedness and inbreeding in Polish population of the Newfoundland dog breed. The aim of the study was to analyse the fi ve-generation pedigrees of Newfoundland dogs, registered in the Polish Kennel Club and shown in 2015 in Poland. Pedigrees come from the Polish Newfoundland Club website and their analysis was possible with the use of the international pedigree database (https:// www.newfoundlanddog-database.net/). Inbreeding coeffi cient (COI) and ancestor loss coeffi cient (AVK) were calculated and pedigrees were analysed for the presence of common ancestor. Results indicate low mean COI values, with individual values ranging from 0.78% to 7.03%. The mean kinship was 3.14. Five-generation pedigree analysis did not show high inbreeding in the population studied and AVK exceeded the suggested value of 85% only in one case. It can be thus concluded that the population of Polish Newfoundlands, at least its part, presented at shows in 2015 and most likely intended for breeding, is not to be considered inbred.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2019, 58[1]; 47-54
    1898-8830
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of recording results of purebred and crossbred Hereford cattle in Poland
    Porównanie wyników oceny użytkowości czystorasowej i mieszańcowej populacji bydła rasy hereford w Polsce
    Autorzy:
    Przysucha, T.
    Gołębiewski, M.
    Slósarz, J.
    Kuczyńska, B.
    Puppel, K.
    Kunowska-Slósarz, M.
    Kalińska, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2082359.pdf
    Data publikacji:
    2019
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    beef cattle
    Hereford
    beef cattle recording
    Opis:
    Comparison of recording results of purebred and crossbred Hereford cattle in Poland. The aim of the study was to compare purebred and crossbred Hereford cattle in respect to their compliance with the breeding goals and standards adopted by the Polish Association of Breeders and Producers of Beef Cattle. The study was based on data for the years 2002–2015 from the PABPBC and for the years 1996–2001 from the National Center of Animal Breeding (NCAB). The properties that were evaluated were the average body weight of calves after birth (kg), average daily weight gain of calves from birth to 210 days (g), average body weight of calves at 210 days (kg) and average milk yield of cows (kg). One can observe a gradual decline in the share of the national Hereford beef cattle population, it also shows a significant decrease in the number of crossbreds with Hereford breed. Purebred Hereford cows delivered calves about 2–3 kg heavier than calves from crossbreds ones. Higher birth weights, both within the purebred and hybrid population, had bulls. The difference between bulls and heifers was usually 2–3 kg depending on the assessment year. For both populations growing trend of bull calves body weight at birth could be observed. In case of heifers calves the growing trend was observed in purebred population only. the average daily weight gain of calves increased considerably in the last years of analysis. The presented data show that both pure-bred calves and hybrids were characterized by relatively high body weight gain in the rearing period. The average daily gain was 812–1002 g for pure-bred heifers and 852– –1045 g for pure-bred bulls and for crossbred heifers 876–1039 g and 889–1081 g for bulls.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science; 2019, 58[1]; 69-78
    1898-8830
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Animal Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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