Науково-технічний бюлетень ІТ НААН -№121 136 and microbial air pollution in the poultry house and determining the impact of their application on the poultry productive indicators.Proceeding from this, the purpose of scientific experiments was to study the parameters of the microclimate of poultry houses and the chemical bed of hens' litter for the use of cell batteries with various air systems removal.In studies of the chemical composition of litter, depending on the terms of accumulation, a tendency towards a decrease in the total nitrogen content in the litter with an increase in the terms of its accumulation on the belt conveyors has been noted. Thus, during the 7-day period of accumulation of litter in cell batteries with built-in air ducts, the content of total nitrogen in it decreased by 7.5 %, with a modernized drying system of litterby 5.7 %, in cell batteries without ductsby 8.9 %. The content of phosphorus and potassium has changed to a small extent, and these changes were associated mainly with a decrease in the relative proportion of nitrogen.It was established that within 7 days of accumulation of litter on the belt conveyors of cell batteries, the content of ammonia in the air increases by 1. 8-2.8 times, reaching the level of 17.14-17.34 mg/m 3 at the end of this period (in MPC 15 mg/m 3 ), the microbial contamination of the air in the poultry house increases in 1,4-1,9 times (from 309-315 thousand bodies/m 3 to 535-579 thousand bodies/m 3 ), exceeding the whole period of accumulation of MPC (220 thousand mt/m 3 ) in 1,2-2,6 times.It was established that when using cell batteries with built-in air ducts, the bird's safety and productivity were somewhat higher than when using cell batteries without air ducts (p≤0.001). Even higher were the use of cell batteries with a modernized air mixer: higher maintenance by 0,3 %, egg productivity by 1,6 pounds, than with the use of cell batteries with standard air vents.
In a scientific and economic experiment, it was studied the effect of the multifunctional probiotic preparation Bionorm K on the stabilizing digestion process and dairy cow milk productivity-increasing during the transition from one ration composition to another. The probiotic drug Bionorm K is a multi-strain product, which consists of 14 strains of bifidobacteria and lactobacillus. Moreover, it has a protective shell, which retains the microorganism activity after passing the acid barrier of the cow's abomasum. It was found that the diet probiotic addition is advisable to start from the first day after calving and continues for 45 days in a dose of 5 g per head per day. The experimental group animals outpaced the control animals by the consumption of dry matter of the diet by 2.6 %. At the same time, the likelihood of developing digestive disorders and the incidence of diarrhea is reduced by 2-2.5 times. At the end of the studies, none of the cows suffered from digestive upsets. Besides, cows, which injected the probiotic to the ration, had improved the ruminative processes due to an increase in the frequency of their contractions compared to the control. Already on the fifth day, the number of ruminal contractions at the experimental animals was 12.5% higher than the control. The higher intensity of rumen work at the experimental cows was maintained during the entire time of probiotic addition into the diet, although the difference with the control was constantly decreasing. The feed probiotic addition promotes a gradual increase in milk production by 7.64 % and an increase in the fat level in milk by 0.02 % compared to the control. At the same time, feed costs of 1 kg of milk decreased by 5.6 %. The probiotic stabilizes the biochemical composition of the cow blood quickly and increases the gamma globulin level at blood serum, which indicates an increase in the immune status of cows in the experimental group.
In most of modern protein nutrition systems by determining the protein requirement of animals, it do not emanate from the content of crude and digestible protein in the ration, but from the amount of protein degraded in the small intestine and defined as the sum of degradable and non-degradable protein in the rumen. A new approach to providing protein nutrition to highly productive animals is based on providing the animal body with easily soluble nitrogen compounds of feed protein and non-protein sources of nitrogen, which is provided by proteolysis of microorganisms and feed protein. During growing calves, the inclusion of protein-energy feed additives with different content of protected protein in the composition of complete diets contributes to obtaining the planned indicators of growth intensity and development of young animals, reducing nutrient consumption and has a positive effect on the economics of growing. As a result of the scientific and economic experience, it has been proved that the inclusion of high-protein feed additives with different contents of degradable protein and starch makes it possible to balance the rations of calves with the necessary amount of nutrients, minerals and biologically active substances. The using of a feed additive with a high content of protein non-degradable in the rumen and passing starch in the diet of heifers of the experimental group made it possible to obtain higher rates of live weight gain of animals by 10,1-10,2 % when grown from 3 to 10 months of age with a highly probable difference. Compared with the control group, which indicates a high productive effect of this additive compared to sunflower meal. The implementation of perspective developed protein supplements in the rations of calves during growing helps to reduce the amount of feed consumed per group by 4314.2 UAH during the experiment period, and allows you to receive additional income from the commercial value of the gain of the whole group – UAH 8719 Keywords: heifers, supplement, feeding, live weight gain, protein.
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