RELATIONSHIP BETWEEN AGE AT FIRST CALVING AND SELECTED FEATURES OF THE LIFETIME PERFORMANCE OF MONTBÉLIARDE COWS
Journal Title: Acta Scientiarum Polonorum Zootechnica - Year 2017, Vol 16, Issue 4
Abstract
A study on the effect of age at first calving on selected features of lifetime performance was carried out in one of the largest herds of Montbéliarde cows in Poland. Data from 205 culled cows included 12,430 test-day milking results and data pertaining to lifetime performance – length of life and productive life; number of calvings; lifetime actual yield of milk, fat, protein and dry matter; the content of these constituents in the milk; and FPCM per day of life and productive life. The values of the lifetime performance traits of the Montbéliarde cows varied depending on their age at first calving. The most favourable age at first calving for the lifetime performance traits of the Montbéliarde cows was 27–30 months (824–915 days), while calving too early (less than 824 days) or too late (above 1038 days) was least favourable. Cows calving for the first time at the age of 824–915 days had the most favourable average daily milk yield (26.6 kg), lactation persistence (34.5% decrease), length of life and productive life (3215 and 2360 days), number of calvings (5.2), lifetime yield of milk and FPCM (49,330 and 50,104 kg), and lifetime yield of FPCM per day of life and productive life (15.7 and 21.4 kg) in relation to the other groups of cows. Differences in the values of these traits between cows that first calved at the age of 824–915 days and cows calving earliest and latest were statistically significant (P ≤ 0.01).
Authors and Affiliations
Ewa Januś, Piotr Sablik, Paweł Żółkiewski
Keywords
Related Articles
- EP ID EP380539
- DOI 10.21005/asp.2017.16.4.07
- Views 110
- Downloads 0
Problems in cooperation with breeders and dog owners on the example of entropion frequency estimation in Polish Hounds
Entropion is a rolling of the eyelid inward toward the eye. It is fairly common condition in a wide variety of dog breeds and its mode of inheritance is not well understood. Entropion has been also documented in the popu...
Effect of inulin-supplemented diet on quail performance parameters and meat quality
This study aimed at evaluation of the effect of inulin-supplemented diet in the rearing period on quail performance parameters and slaughter value. The quails of group 2 and 3 were fed compound feeds containing inulin at...
ANALYSIS OF PRODUCTIVE TRAITS AND EGG QUALITY IN OLD NATIVE BREEDS OF GREENLEG PARTRIDGE AND YELLOWLEG PARTRIDGE HENS
The objective of the study was to analyse productive traits and quality of eggs in two native breeds of laying hens: Greenleg Partridge (Z-11) and Yellowleg Partridge ( ˙ Z-33). The populations of these old native breeds...
Effectiveness bacteriolysis of Shiga toxin-producing Escherichia coli O157: H7 caused by specific bacteriophage isolated from pig slurry
This study was aimed to in vitro evaluation of a bacteriophage isolated from pig slurry samples as a bacteriolytic agent to elimination Shiga toxin–producing E. coli (STEC) O157: H7. Collected STEC O157: H7 strains was s...
PREDICTION OF THE FATTENING PERFORMANCE OF YOUNG SLAUGHTER CATTLE BASED ON SELECTED LIVE ANIMAL MEASUREMENTS
The objective of the study was to determine the possibility for early prediction of the fattening ability of young crossbred beef bulls using multiple regression equations developed on the basis of selected live animal m...