Home > Search Results: keywords:"délka struků"
Search:
Search Tips :: Advanced Search
Search collections:
Sort by: Display results: Output format:
National Repository of Grey Literature 1 records found  Search took 0.01 seconds. 
Analýza délky struků u českého strakatého skotu
 Sečkař, Jan
This diploma thesis deals with the analysis of teat length in first-calf heifers of Czech Fleckvieh cattle. The measured teat length is here evaluated and related to other selected indicators of exterior and milk yield in the selected group of first-calf heifers. The work also compares the values of the measured teat lengths with the estimated values of the exterior evaluator from the official evaluation of the exterior of first-calf heifers. In connection with teat length, an analysis of the used bulls and lines in breeding is carried out here. In this experiment were measured 121 first-calf heifers. The average length of hind teats was 3.4 cm and fore teats 4.52 cm. The measured values were statistically significantly different from the official teat length estimate, the teat lengths indicated by the exterior evaluator were on average 0.24 cm higher. It can also be stated that the front teats were on average 1.2 cm longer than the rear teats. The correlation between fore and hind teat length was 0.73. No statistically significant influence of the level of milk yield on the length of the front and back teats was observed. On the other hand, a statistically significant influence of the sire effect (p <0.01) on the length of the front teats was observed. Chest circumference also had a statistically significant (p <0.05) effect on the length of the front and back teats. Dairy cows with a larger chest circumference had longer teats. In conclusion, it can be stated that milk productivity is not related to the length of the teats, the father's influence appears to be essential, so the farmer can solve the problem of short teats in his herd especially by using suitable bulls with regard to the breeding value for teat length.
Detailed record

Interested in being notified about new results for this query?
Subscribe to the RSS feed.
Digital Repository :: Search :: Submit :: Personalize :: Help
Powered by Invenio v1.1.2
Maintained by admin.invenio@techlib.cz
This site is also available in the following languages:
Česky  English