proposals are being made for the inclusion in the program of further studies of
indicators of chewing activity of animals. Such parameters are necessary for functional
understanding and simulation of chewing activity of cattle [18, 278-301].
The effectiveness of the control of chewing activity is quite thoroughly
investigated by R.J. Grant et al. [19, 3158-3164; 20, 156-163; 21, 365-382; 22; 23]. It
has been determined that rumination is controlled by factors such as the amount of fiber
and the degree of feed shredding, the degree of overflow of the sections, the strategy
of grouping and other potential environmental stressors. Rumination reflects the
functional state of the body of cows and is very sensitive to their well-being. Current
research and farm experience are beginning to demonstrate the importance of
ruminating monitoring for identifying feeding problems, detecting cows in estrus, early
detection of health disorders, optimizing the evaluation of newborn cows, and setting
up treatment protocols based on the sensitivity (response) of cows, since chewing
meets stress factors at a minimum 24 hours earlier than traditional surveillance
methods,
which
provides
more
effective
cow
management.
Summarizing the information obtained from literary sources and the results of their
own research [22, 23], the following directions of practical use of data on the
continuous monitoring of ruminous activity were noted: as an instrument of superficial
effective control of scar digestion and dietary properties of the diet; the quality of the
daily work of the operator for the preparation of feed mixtures and the appropriateness
of changes in feeding patterns [24, 10; 25, 3635-3647; 26; 27, 1463-1481]; as a high-
tech means, which allows to optimize the process of daily operational management of
the technological group, which is especially important for transitional cows [28;
29,144-149; 30,122-127; 25,3635-3647; 314544-4554; 32.91-92; 33; 34; 35; 36,4286-
4298; 37,4852-4863]; as an indicator of thermal stress [38,1-11; 32.91-92]; as a system
that allows the detection of cows and heifers in hunting (in conjunction with the
monitoring of motor activity) with the precise binding of the stages of the hunting to
the time parameters [39,148-154; 40.7088-7092], as well as the possibility to
significantly accelerate the identification of animals with veterinary problems and
improve the effectiveness of their treatment due to the continuity of control [41,1-16].
In our opinion, the question of determining the optimal size of grinding of crude
feed to particles to provide the desired gum time is very relevant. Therefore, the
purpose of our study was to: evaluate the effect of the change in the size of the grinding
particles of crude feed on the functional state, the level of chewing activity and the
nature of the course of metabolic processes in the dairy cow organism.
Research results. 1. The degree of grinding of roughage and the functional
activity of the body of dairy cows. Investigation of the dependence of chewing activity
of animals on the degree of shredding of fibrous components of the diet was carried
out on the dairy commodity complex of the farm "Maiss" of the Khmelnitsky region
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