ENVIRONMENTAL AND GENETIC EFFECTS ON PREWEANING PERFORMANCE OF CALVES FROM FIRST-CROSS COWS. I. CALVING EASE AND PREWEANING MORTALITY
نویسندگان
چکیده
منابع مشابه
the effects of planning on accuracy and complexity of iranian efl students’ written narrative task performance
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15 صفحه اولthe effects of time planning and task complexity on accuracy of narrative task performance
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متن کاملPreweaning performance and body composition of calves from straightbred Nellore and Bos taurus x Nellore crosses.
The objectives were to evaluate preweaning performance, body composition, and efficiency of calves representing straightbred Nellore (NL), F(1), and 3-breed-cross systems. Energy requirements, milk production, and efficiency of 39 cow-calf pairs were recorded from straightbred NL calves from NL cows (10), crossbred (Angus-sired) calves from NL cows (ANL: 9), and crossbred calves (CC; Canchim-si...
متن کاملProduction characters of first generation cows of a five-breed diallel: reproduction of mature cows and preweaning performance of calves by two third-breed sires.
The fourth through sixth parity of 5- to 10-yr-old cows were used to evaluate trade-offs involved with sires of large mature size vs medium mature size in a terminal sire crossbreeding program and to characterize five breeds and their crosses for their potential as dam lines. Charolais and Red Poll bulls, representing large (L) and medium (M) mature size, respectively, were mated to cows repres...
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ژورنال
عنوان ژورنال: Canadian Journal of Animal Science
سال: 1982
ISSN: 0008-3984,1918-1825
DOI: 10.4141/cjas82-005