Recently, the requirements for the quality and safety of poultry products have significantly increased, what has notably limited the use of antibiotics in feeding poultry. This is one of the reasons for the growing interest in the use of phytogenic feed additives. We have conducted an experiment to determine the influence of Artemisia capillaris on young quail meat productivity. To carry out the experiment, we have formed five groups, each counting 100 quail heads. During the experiment, which lasted for 35 days, dried powdered wormwood (Artemisia capillaris) in the amount of 0.5%, 1.0 and 1.5% by weight of compound feed was introduced into the feed of birds of the 2 nd , 3 rd and 4 th experimental groups. The experiment showed a positive effect of the studied factor on the body weight of quail; the highest body weight was in quail of the 3 rd group -251.03 g, and the lowest it was in the control group -238.24 g. Also during the experiment, the lowest feed costs per 1 kg of body weight gain were in quail of the 3 rd experimental group, which by this indicator exceeded the control group by 4.91%. Feeding wormwood as a part of the compound feed in the amount of 0.5 and 1.0% of the 2 nd and 3 rd experimental groups increased the weight of gutted carcass by 0.41-1.67%, while further increase of wormwood content to 1.5% in the feed of the 4 th experimental group led to a decrease in the weight of gutted carcass by 0.26% compared to the control group.
The impact of different levels and sources of coppermixedligand on productivity and its metabolism in young rabbits of California breed in combination with sulfates was investigated in experiment. For rabbits of the 1 st control group 7.81 g/t of copper sulfate was injected into the mixed fodder, of the 2 nd experimental group -7.81 g/t of coppermixedligand, of the 3 rd , 4 th and 5 th experimental groups, respectively, g/t: 5.86; 3.91 and 1.95. As a result, the rabbits of the 1 st control group and the 2 nd experimental group deficit of copper was eliminated by 100% to the existing norm, and the rabbits of the 3 rd , 4 th and 5 th experimental groups -by 75, 50 and 25%. Studies have shown that during the main period of the experiment, the increase in live weight in all experimental groups exceeded the indicator of the control group. In particular, in rabbits of the 2 nd experimental group this exceeding was 9.0% (p < 0.05), 3 rd -13.2% (p < 0.05), 4 th -14.0% (p < 0.001) and 5 th -by 4.9%. Among all the experimental groups, the best indicators of nutrient digestibility of feed were the rabbits of the 4 th experimental group, which in the composition of the mixed fodder fed coppermixedligand, which covered a deficiency of this element by 50% in metal chelate from the amount of Copper of the 2 nd experimental group. Compared to control group the digestibility rate of organic feed matter in these animals increased by 3.7%. This increase was due to an increase in the digestibility of crude protein -by 4.5%, crude fat -0.5, crude fiber -4.6 and nitrogen-free extractives -3.7%. According to the results of the experiment, the rabbits of the experimental group 4 ate 5.0% less feed than the counterparts of the 1 st control group, and the feed costs were 3.9% lower. The use of the organic form of copper in the form of mixed-ligand complex in mixfeed for rabbits of breeding on meat in the amount of 3.91 g/t or 50% of metalchelate promoted an increase in the growth of animals, nutrient digestibility of feed and reduced feed conversion.
Aimed to study the effective use of different doses of cuprum proteinate in the diet of broiler chickens, three groups of animals were formed with 50 chicks in each. Chickens from the 1st control group received cuprum sulphate as a part of compound feed, and animals from the 2nd and 3rd experimental groups received cuprum proteinate. The concentration of Cuprum in the feed in the 1st and 2nd groups was identical, and in the 3rd experimental group the amount of Cuprum was reduced by 25% compared to the control. During scientific and economic experiment, it was found that the replacement of cuprum sulphate with its proteinate with the same concentration in the feed has a positive effect on the average daily gain of broiler chickens, and therefore a live weight. Thus, the animals from the 2nd experimental group exceeded control analogues by 7.5% in average daily gain and by 9.4% in body mass at the end of the experiment. Reducing the concentration of Cuprum in the feed of chickens from the 3rd experimental group by 25% (the source of the microelement is cuprum proteinate) compared to the control also had a positive effect on the productivity of these animals. They exceeded control analogues in terms of average daily weight gain by 3.8%, and in terms of live weight by 5.8%. At the same time the direct correlation between animal productivity and quantity of the consumed feed was noted. Thus, broilers from the 2nd experimental group consumed more feed by 3.3% compared to control peers. The chickens from the 3rd experimental group exceeded controls by 1.5% in this index. Thus, cuprum proteinate is a more efficient source of Cuprum for broiler feed. The concentration of this microelement in the feed of these animals aged 5-21 days should be 18.2 g/t, 22–35 days - 16.8 g/t, 36–42 days - 12 g/t or 16.5 g/t on average during the experiment.
Commercial concentrated feeds are traditionally a major component of rabbit diets which contain Cadmium element in quantities above generally accepted level. This toxic trace element can accumulate in meat, kidneys, liver, bones and spleen of rabbits. Consumption of such meat and by-products will contribute to the accumulation of Cadmium in the human body, which may lead to a number of pathological changes. In this study, 100 young rabbits-analogues of silver breed were selected, and divided into 5 groups, 20 rabbits in each group: the 1st group was the control group, the 2nd, 3rd, 4th and 5th were experimental with total 60 days duration period. Results showed the smallest content of Cadmium in slaughter products was observed in the rabbits at 5th experimental group. In conclusion, the course of the experiment, it has been established that supplementation into the rabbit's mixed fodder of dry sugar beet pulp contributes to reducing the level of Cadmium accumulation in slaughter products. It has also been noted that most of Cadmium is excreted with feces, that is, it is not absorbed into the bloodstream and does not have a negative effect on the body of the rabbit.
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