Indicators of productivity of cows of the black-pestro breed during use in rations organic chrome презентация

PURPOSE
comprehensive study of cow productivity indicators against the background of the use of chromium-containing additives of organic form (chromium propionate, chromium acetate) in their diets

Tasks:
to study the effect of the use of chromium propionate in the diets of cows on productivity indicators;
to pick up analogue chromium-containing supplements organic forms, to carry out laboratory experiments on studying the safety of supplements on white mice;
to conduct a comparative study of the impact of various chromium-containing additives of organic form in the diets of cows on productive, reproductive and interior performance;
to study the dependence of cow productivity indicators on the dose of chromium acetate feeding;
to conduct an economic assessment of the feasibility of using chromium-containing additives in the diets of cows.

Experimental studies were carried out on the basis of
"Educational farm July Izhevsk state agricultural
Academy" Votkinsk region of the Udmurt Republic on highly productive cows of black and white breed. Three series of experiments were conducted.
In the first series of experiments investigated the use of chromium propionate (Kemin Centres company) in feeding of highly productive cows.
The dose of chromium propionate in the diets of cows was established on the recommendations of the additive manufacturer taking into account modern developments in the regulation of chromium in the diets of cattle.
Groups were formed to conduct research using the method of analogues. The animals were selected three weeks before the planned calving.

Table 1 - Milk productivity and quality characteristics of milk of cows for the first 100 days of lactation

Table 2 - Dairy productivity of cows for 305 days of the finished lactation

Table 3 – Calving and postpartum period

Table 4 – reproductive performance

Chromium acetate→
the increase of insulin activity →
increased glucose metabolism →
increased energy use of feed →
increase milk production
Chromium acetate
For the second series of experiments at the Department of chemistry of the Izhevsk agricultural Academy was obtained chromium acetate. The safety of the Supplement has been tested on laboratory animals (white mice).

Laboratory research

Table 5 - Milk productivity and quality characteristics of milk of cows for the first 100 days of lactation

Таблица 6 – Молочная продуктивность коров за 305 дней лактации

Table 7 – Biochemical indicators of blood of cows

Table 8 – Calving and postpartum period

Table 9 – Reproductive performance

Table 10 - Milk productivity and quality characteristics of milk of cows for the first 100 days of lactation
лактации
Примечание: *Р≥0,95

Table 11 - Dairy productivity of cows for 305 days of the finished lactation

Table 12 – Biochemical indicators of blood of cows
Note : *Р≥0,95

Table 13 – Calving and postpartum period

Table 14 – Reproductive performance

Table 15 – Economic assessment of the use of different levels of chromium acetate in cow diets

Conclusion
The use of chromium propionate in the diets of heifers three weeks before calving and cows in the first 100 days of lactation at a dose of 10 mg per head per day (in terms of chromium) increases milk yield for the first 100 days of lactation by 8.7%, reduces the number of pathological births, reduces the duration of the service period by 18.3 days, normalizes blood glucose by 0.97 mmol/l.
An analogue of the imported drug (chromium acetate) by reducing hexavalent chromium (SG+6) in trivalent (SG+3) molasses in the presence of acetic acid. Molasses is chosen as a reducing agent, as the most affordable and cost-effective source. Laboratory experiments on mice showed the safety of the obtained additive in dosages of 0.1; 0.15 and 0.25 ml.
A comparative study of the use of chromium propionate and acetate showed that the effect on the performance, reproduction and blood biochemistry of the studied additives have the same effect. Milk yield for 100 and 305 days of lactation increased by 7.5-10.3% and 6.0-7.0%, respectively, reduced the duration of the service period by 14-20 days. The best results were obtained using chromium propionate.
Determination of the optimal dose of chromium acetate was carried out in comparison with animals receiving the main diet and with analogues receiving chromium propionate. It was found that cows receiving Chromium acetate with an increased level of trace elements in the diet (in terms of chromium 11.5 mg) increased milk yield for the first 100 days of lactation by 10.8% compared to the control group, while fat content in milk increased by 0.13% compared to the control group and by 0.16% compared to analogues receiving chromium propionate. Similar results were obtained for 305 days of lactation: milk yield increased by 8.3 %, Fat content by 0.1 %. The improvement of reproduction indicators was noted: the multiplicity of insemination decreased by 0.52, the duration of the service period decreased by 21.3 days.
The use of chromium acetate in the optimal dosage can increase the level of profitability by 11.43%. Improving the reproductive qualities contributes to the reduction of the coefficient's barrenness, loss of milk per 1 cow to 47% and to reduce the loss on 9089 rubles. Production testing confirmed the results.

To increase milk productivity, improve the reproductive qualities of cows, as well as improve the economic performance of milk production, enter into the diet of Chromium acetate in the amount of 0.575 ml per head per day (in terms of chromium 11.5 mg) three weeks before the planned calving and in the first three months of lactation.
Production proposal

The results of the studies have prospects, both in scientific and practical terms, and confirm the need for further study of the effectiveness of the use of chromium acetate in the diets of feeding cattle of different age groups. Of great scientific interest is the study of the effect of organic chromium additives in the diets of cows on the digestibility and absorption of feed nutrients.
Prospects for further development of the topic