- Type of paper
: Paper in journal
Title: Effect of energy level of rations in dry period and early
lactation on production of high yielding dairy cows
- Authors:
- Uremović, Zvonimir (43860)
- Uremović, Marija (88566)
- Lukač-Havranek, Jasna (74232)
- Tabaković, Ljubko
Journal: Stočarstvo
Number: 3
ISSN: 0351-0832
Volume: 46
Year: 1992
Pages: from 79 to 93
Number of references: 21
Language: hrvatski
Summary: Effects of different energy levels in rations offered
during the 50 days od dry period (1.57 M.R. and 1.93 M.R.) and different
concentration of net energy in rations, 105.0 and 115.0% F.U., in dry
matter of rations during the 90 days of early lactation, were studied on
four groups of HF cows, 11 in each. The cows were ted rations of different
energy levels: low-low, low-high, high-low and high-high during the dry
period and in early lactation.Feeding rations of different energy levels in
the dry period did not influence milk production in early lactation.
Feeding cows complete rations ad lib. and with higher concentration of net
energy significantly increased daily milk production and 4% FCM (P) and
nonsignificantly total production of 4% FCM (P>0.05) during the 90 days of
early lactation. The least feed consumption per one kg of 4% FCM was
observed in the group fed low-high energy level.
Keywords: cow, dry period, early lactation, energy level, complete diet, milk production.
- Type of paper
: Paper in journal
Title: Level of metabolites in blood as an indicator of nutrient
supply of high-producing dairy cows
- Authors:
- Uremović, Marija (88566)
- Uremović, Zvonimir (43860)
- Katalinić, Ivan (60653)
- Uremović, Marija (88566)
- Uremović, Zvonimir (43860)
- Katalinić, Ivan (60653)
- Uremović, Marija (88566)
Journal: Krmiva
Number: 5
Volume: 37
Year: 95
Pages: from 254 to 263
Number of references: 37
Language: hrvatski
Summary: Cows givn diets of higher energy level produced highly
significantly more milk with significantly more intensive biomass
degradability during the first 40 days of lactation. Levels of glucose in
blood in all groups of cows were inside the limits of physiological values
and differences between groups were small and insignificant. Groups given
diets of higher energy levels had significantly higher level of free fatty
acids and cholesterol in blood. Increased values were established in all
groups. Mean values of AST were normal, but the percentage of cows with AST
increased above physiologically normal values was considerable what
indicates decreased liver function and problems in satisfying nutritive
values of high-producing dairy cows.
Keywords: cows, milk production, body weight, energy of diet, blood constituents.
- Type of paper
: Paper in proceedings
Title: Utilization of genetic potential of high-productive dairy
cows and the causes of its reduction
- Authors:
- Uremović, Marija (88566)
- Uremović, Zvonimir (43860)
- Marković, Dragoljub
- Editors
- Pucarić, Aleksandar
Proceedings title: Poljoprivredne aktualnosti
Language: hrvatski
Place: Zagreb
Year: 1991
ISBN/ISSN: 0350-6622
Pages: from 663 to 670
Meeting: Dostignuća i perspektive ratarsko stočarske proizvodnje u tržnim uvjetima
Held: from 02/04/91 to 02/09/91
Summary: This investigation has revealed the metabolic disorder,
ketosis, influences reduced milk production and reproductive efficiency.
Cows affected by ketosis produced 7.41% les milk and their service period
was 19* days longer in comparison with those without ketoses. Of factors
that determine manifestation of ketoses, the variability dependant of the
genotype was found to be low (h2=0.323 +-0.014). Far greater effect has
feed, i.e. statisfaction of the requirements in energy and functioning of
the liver. It is proved by the correlations between ketoses from the one
part, and level of glucose in blood and GOT activity (glutamate oxal
acetate transaminase) from the other.
Keywords: milk production, ketoses, service period, blood parameters.
