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Молочнохозяйственный вестник, №4 (24), IV кв. 2016
219
рефераты
показателей молочной продуктивности коров.
Summary
Analysis of the basic bulky feed quality harvested on the farm “Plemzavod Rodina”
of the Vologda region has been carried out. The analysis of milk production of cows
has been performed on the results of the control milk yield held once a decade broken
down by technologies of milking - robotic, milking parlor and milk line. The volume of
harvested silage has increased by 1.5 times while haying one has dropped 2-fold. In the
harvested silage an increase in the content of crude protein from 21,31g to 34,14g and
digestible protein from 13,76 % to 22,98 % has been observed . In the period under
review an increase of the mass fraction of fat in milk with all the management and
milking methods from 3,7% to 3,78%, with the highest content of it by milking cows in
the milking parlor has been noticed. At the same time in a mass fraction of milk protein
we can observe a tendency of its decreasing by milking in a milking parlor from 3,37 %
to 3,34 %. When milking in milking line and by robots the protein mass fraction remains
at the level from 3,37% to 3,38% and from 3,39% to 3,41% respectively. The results of
the research indicate that the increase of harvested feed level and its nutritional value
has a positive effect on dairy cow productivity. At the same time a high percentage of
low level feed does not allow realizing the full genetic potential of the animal as well as
has a negative impact on certain milk quality indicators. Therefore, harvesting of top-
level feed is one of the main indicators of milk yield increasing.
Электронная Научная СельскоХозяйственная Библиотека