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Information × Registration Number 0201U004499, 0198U009002 , R & D reports Title "Тo explore the mechanisms of substrate regulation of nutrient fermentation and utilization in calves and to elaborate the system of their valuable feeding" popup.stage_title Head Sologub leonid Illich, Registration Date 11-06-2001 Organization Institute of Animal Biology Ukrainian Academy of Agrarian Science popup.description2 In the investigations were used 6 steers (3 in control group and 3 in experimental group) with rumen and duodenum tu- bules, which were maintained on the standart rations. The animals of control group obtained in ration the concentrated feeds in native form and the animals of experimental group received the extruded concentrated feeds. The rumen and duodenum liguid was sampled through thetubules in different age periods from 1-till 18-month and in thesamples were investigated the content of microbial mass, the guantity of microorga- nisms, the concentration of bacterial, protozoal and feed proteins, am- monia, volatile fatty acids, the activity of aminotransfera ses and of am- monia metabolism enzymes, the cellulolytic, amylolytic and proteolytic activity. In addition in rumen in situ the intensity of concentrated feeds and their ingredients degradability was determined. It was established, that the velocity of native and extruded concentra- ted feeds degradation in the rumen of calves was different, a nd depend on their accessibility and animal age. The extrusion decreased the inten- sity of degradability of proteins and in the same time it increased the degradatuion of nonprotein part of feed. With the course of life the in- tensity of extruded concentrated feed degradabi lity somewhat increa- sed.In rumen of 1-month calves the content of microbial mass is compara- ratively low and increases approximately 8-fold till 3-month of animal age. In the younger calves the extrusion has a little effect on the growth of microbial population in the rumen, but in the rumen of older animals the content of microorganisms is higher, when feeding whith native feeds. Whith the age of animals the proteolisis in rumen intensifies. In the same time the ratio between the content of feed proteins and micro- bial proteins decreases. The content of bacterial proteins and infusorial proteins in the rumen is approximately egual. In the chyme of duodenum prevail the infusorial proteins. The feeding of animals with extruded concent rates reduces the content of bacterial cells in rumen liguid, but on the content of infusorial cells it has a weak influence. Herewith the redistribution of different grops of bacteria is observed - the content of cellulolitic and amilolytic bacteria decreases, and the content of proteolytic bacteria increases. The marked differen- ces under the differentty pes of feeding in the activity of ammonia meta- bolism enzymes in rumen content and in the rumen content and in the activity of digested enzymes in chyme of duodenum are detected. In the experiments in vitro was show that chromium (III) in the con- centration of 0,35 hhm has an inhibitory effect on the intensity of meta- bolic processes in the rumen of steers, whereas chromium in concentra- tion of 0,2 ppm, in contrary, activates the vital activity of microorga- ganisms. The main part of investigations was carriad out on two grouhps The branch of using. The livestok, the breeding and feeding of calves. (control and experimental) of steers from 1-till 18-mo nths of age in The exemination of the obtained results in the industrial conditions institute experimental farm "Chyshki". showed that feeding of calves with concentra tes in extruded form in- The aim of investigations was the exploration the influence of feed creases the gains of animals from 10 till 12%. Product Description popup.authors popup.nrat_date 2020-04-02 Close