Warianty tytułu
The analysis of the results of lowland red-white bulls performance evaluation
Języki publikacji
Abstrakty
The studies were carried out at Bull Rearing Center in Głogówek on 749 bulls. They were raised and evaluated in 1978-1987. Their body weight and height at withers at the age of 360 days and daily weight gain did not change significantly during 10 years. Their average body weight at the age of 360 days was 436.6 kg, the height at withers was 118.3 cm and daily weight gain during the experiment averaged 1308 g. Great differentiation in the values of the analysed traits among the groups of different bulls' sons was observed. Lowland Red-White cross-bred bulls and those of Holstain-Frisian breed had better characteristics that those of Lowland Red-White bulls 30,4% of the total number of bulls were culled. The most common reasons were: lack or weakened libido, leukemia, poor quality semen, negative result of individual evaluation, abnormal constitution of sex organs.
Wydawca
Rocznik
Tom
Opis fizyczny
s.55-64,tab.,bibliogr.
Twórcy
autor
- Katedra Genetyki i Ogólnej Hodowli Zwierząt, Akademia Rolnicza we Wrocławiu, Wrocław
Bibliografia
- [1] Grabowski R.: Genetyczne i fenotypowe parametry cech wzrostu i budowy buhajów z wychowalni centralnych. Rozpr. nauk. i Monogr., Wyd. SGGW, /rozpr. hab./, Warszawa 1981.
- [2] Hibner A., Ziemiński R., Olczak E., Brajer H.: Zesz. nauk. AR Wrocław, Zoot. XXVIII, 1985, 15-24.
- [3] Instrukcja w sprawie zasad organizacji i metodyki prowadzenia oceny i selekcji buhajów. Min. Rol., Warszawa 1976.
- [4] Krysa M., Jaczewski S., Nowicki B.: Zesz. nauk. AR Wrocław, Zoot. XXII, 1980, 63-67.
- [5] Nahlik K., Szeląg B.: Rocz. nauk. Zoot., 6, 2, 1979, 89-98.
- [6] Ruszozyc Z.: Metodyka doświadczeń zootechnicznych. PWRiL,, Warszawa 1981.
- [7] Szeląg B., Nahlik K.: Rocz, nauk. Zoot., 6, 2, 1979, 57-65.
- [8] Weinmann A.: Zesz. nauk. AK Wrocław, Zoot. XXIII, 1980, 43-61.
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
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