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Celem pracy było porównanie cech ilościowych nasienia i budowy morfologicznej plemników buhajów najliczniejszych ras w Polsce. Badaniami objęto buhaje ras czarno-białej (cb) i czerwono-białej (czb) oraz mieszańce tych ras z rasą holsztyńsko-fryzyjską (hf). Analizowano cechy ilościowe (liczbę ejakulatów, objętość ejakulatów, liczbę porcji nasienia, koncentrację plemników, ruch postępowy) oraz budowę...
The examinations were carried out on 54 bulls divided into seven experimental groups. Following the injection of Propranolol and Levonor made by Polfa, experimental groups 4 and 7 or only Propranolol experimental groups 3 and 6, a statistically significant increase of the concentration of spermatozoons in a unit and in the whole ejaculate (25-35%) was observed.
Field strains of BHV1 isolated from bovine semen at different periods in Poland have been studied by the restriction enzyme analysis of DNA. It has been shown that the Aguille strain isolated in 1976 belongs to the subtype BHV 1.2 which comprises IPV strains. But strains III/2, III/3 and 6/42 isolated in 1981 belong to the subtype BHV 1.1 which comprises IBR strains.
W przedstawionej pracy dokonano oceny dwóch systemów chowu buhajów przygotowywanych do użytkowania rozpłodowego, tzn. zwierząt w wieku 10-14 miesięcy. W rocznym cyklu obserwacjom poddano 60 buhajów utrzymywanych na uwięzi oraz 60 buhajów z indywidualnych kojców z pojedyńczymi wybiegami o powierzchni ok. 10 m2. Porównania wyżej wymienionych systemów chowu dokonano w na podstawie badania jakości nasienia,...
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