The article gives mechanisms of the influence of the
main sex hormones on the sexual cycle of cows and
heifers and the effectiveness of their insemination. The
effectiveness of gonadotropin preparations releasing
hormone, prostaglandin and progesterone, used to
induce sexual hunting, was studied. The use of
combined use of hormones and prostaglandins is
effective for synchronizing sexual hunting, regardless
of the stage of the sexual cycle on which healthy
animals can be at the time of their administration. The
reasons for the retention of the yellow body in the
ovary are very diverse. The results of the studies
indicate that a particularly close relationship exists
between the yellow body and the uterus
The article discusses the impact of color lighting on changes in productivity and environmental safety of poultry products. We have given recommendations to optimize the cost of electricity for lighting the house
The results of a comparative study of the experimental groups of Holstein animals belonging to the Vis Bey Eidial line are given: four groups of repair calves and four groups of gobies. Their hematological indices were studied at higher daily rates of milk drinking and early training of experimental animals to plant feeds with a probiotic supplement of cellobacterins in the milk period. The difference between the groups was the technology of their cultivation: I-control group - up to 6 months of the age was grown according to the traditional technology adopted in the farm: 200 kg of milk (for 50 days) and 400 kg of return (from 50 to 110 days), and concentrated feeds consisting of pre-fodder (50%) and corn (50%), the same calves received experimental calves; II-test group - up to 6 months increased norm of milk drinking (for 25 days) - 200 kg and 400 kg of return (from 25 to 60 days); III-test group - up to 6 months the increased norm of drinking milk (for 50 days) - 450 kg and return (from 50 to 110 days): heifers - 600, bulls -800kg; IV-test group - up to 6 months an increased rate of milk drinking (for 60 days) - 450 kg and return (from 60 to 120 days): heifers - 600, bulls -800 kg. The calves of all experimental groups were fed a probiotic preparation of cellobacterin in an amount of 3 g for each animal up to 18 months of age. When the experimental animals reach 12-, 15-, 18-months age, hematologic examinations were carried out. It has been established that with the age of experimental animals, metabolic processes are intensified, the change of which was influenced by the use of different norms of drinking milk during the milking period, using a probiotic
This article is devoted to a comprehensive survey of parasitocenosis in 5 peasant farms content 1156 birds, 8 species of chickens, the minimum number in a separate farm was -26 birds, maximum -535. This is the first publication in which the material on helminthocenosis is presented as an integral part of parasitocenosis of individual bird species (intensity of infestation, extensiveness of infestation, associative groupings). The rest of the material on mites, puffers, and bloodsuckers, coccidia, histomonads, microfauna, will be presented in the next publications
The researchers obtained data on the morphological, biochemical and trace element composition of the blood of bull-calves of Hereford breed of different sizes. In this regard, scientists and business executives have three natural questions: 1) whether it is possible to predict the size and thus the meat productivity of bulls using these blood indicators; what are the strength and direction of the influence of certain values of blood indicators on the size and weight of bulls; what blood indicators are similar in meaning, and what are different and how much (to what extent). The article is devoted to the reasoned answers to these questions by applying modern methods of mathematical and numerical modeling to solve the corresponding problems. The results of the study can be used by anyone, due to the fact that Eidos the universal automated system, which is a tool of ask-analysis, is in full open free access on the author's website at: http://lc.kubagro.ru/aidos/_Aidos-X.htm, and numerical examples of solving the mentioned problems with the use of artificial intelligence technologies are placed as a cloud Eidos-application #133
The article is devoted to the method of selecting
quails. Intensive development of re-fishing requires the
development of breeding methods for selecting birds
and to carry out early predictions of egg production.
Targeted breeding selection is able to influence the
mechanisms of correlation dependencies between
individual parts of the animal's organism, significantly
change even firmly established interrelations, and
create new interactions more satisfying the needs of
the individual. The research task consisted of
establishing links between the parameters of the
skeleton and the productive qualities of the layers. The
studies were conducted on Texas white quails. We
took into account the live weight of the bird, the length
of the metatarsal and the third finger, as well as the
small and large diameters of the metatarsal.
Correlations were established between the length of
the pelvic limbs and the live weight of young quails
during growth. It is established that the growth of the
skeleton ends with the age of onset of puberty. This
provides a basis for predicting the live weight,
depending on the length of the pelvic extremities. It is
established that the live mass is directly related to the
egg productivity of quails. Thus, by selecting the birds
with the longest plus, it makes it possible for 25 weeks
of productivity to increase the egg laying on the initial
layer by 5,7 eggs and 6,2 eggs per average laying hen,
respectively
Diabetes Insipidus is found in dogs and rarely in cats. The study of this disease is a hot topic today, as it is challenging for the veterinarian in the diagnosis of its patients. You must take into consideration and study of such diseases, as it is important to of differential them from other diseases. Special attention the doctor pays to the etiology, diagnosis, and most importantly, treatment. It is also important to inform pet owners about the timely prevention of this disease. It has several mechanisms of development, and this will depend on the treatment process of the patient. The development of the disease directly depends on the speed of "fading" of kidney function and how soon the animal will be helped. Completely cure pet yet possible, but therapy can support the required amount of hormone in the body, and the physical condition of the animal is normal. Diabetes Insipidus is a serious condition that requires proper attention. In the final stages of your pet there is shortness of breath, frequency of seizures increases. The animal begins to refuse food, the skin becomes dry, appear constipation and incontinence. If the animal will not be treated, then it can live for about one to two years, and then die from exhaustion, perhaps a pet will fall into a coma. Therefore, the veterinarian must correctly explain to the pet owners than to end their inaction, as well as to prepare them for the fact that the pet will constantly be required drugs
Relative to the emergence and wide extension of an antibiotic resistance in infectious agents of animal infectious diseases, the particularly important assessment increases over change of sensitivity of various groups of microorganisms to anti-infective drugs. Results of studying antibiotic sensitivity of the enterobacteria isolated from an intestine of sick calves, and dynamics of its change within three years are presented in article. Results of the research demonstrate prevalence of resistance to the majority of anti-infective drugs (AID) among the Enterobacteriaceae isolates emitted from calfs. To chloramphenicol, neomycin and streptomycin from 100% of isolates E. coli, Proteus, Enterobacter, Morganella, Citrobacter were sensitivity. From AID of group of aminoglycosides gentamycin, from group of quinolones – enrofloxacin was the most effective. The good sensitivity to a polymyxin was shown to 80 % of isolates E. coli, Citrobacter spp., Klebsiella spp. It was established that 66,7 % of E. coli isolates, 57,1 % of Enterobacter spp., 75 % of Morganella, 60 % of Edwardsiella, 42,9 % of Citrobacter spp., allocated from sick calfs, has fastness to 7 AID. At the same time to other AID of a series the appreciable number of multiresistant strains shows weak sensitivity. The tendency of augmentation of number of antibiotic resistance isolates to AID which are widely applied in veterinary practice as time passed. High frequency of the combined resistance to traditionally used antibiotic drugs – to kanamycin (up to 80 %), to tetracycline (up to 85 %) and to chloramphenicol (up to 8 3%) testifies to need of obligatory test for sensitivity to AID before their use
In this work, we have found shortened particle forms of the filamentous bacteriophage Pf, when the lysis of the Pseudomonas aeruginosa PAO1 strain was induced by extracts of bison feces to study the intestinal bacteriophages of this animal. The sizes of the shortened particles from 250 to 950 nm and their thickness 17 nm were determined. The particles had a slightly pointed one end and sometimes a flag on the other extended end. The particles were formed in the process lysis of this strain by other bacteriophages. These lysates also contained a high concentration of vesicles from the pseudomonad membrane. The article discusses the mechanisms of prophage induction in the Pseudomonas aeruginosa PAO1 strain due to phage-phage induction and substances of the investigated extract
The article presents a factorial model for determining the needs of lactating cows in essential amino acids. The algorithm of the model uses fragments from the NRC – 2001 models [39], CNCPS – 200 [60], and research materials published in the world literature. Instead of the transformation coefficients of the metabolizable lysine and methionine for milk production equal to 0.85 and 1.00, respectively, by the CNCPS, the coefficients 0.68 and 0.66 were used according to Doepel et al., 2004 [49] and the authors' own data [69]. Norms obtained using this model in lysine and methionine in milk production and maintenance in percentage of metabolizable protein (MP) were 7.28 and 2.4%, which is identical to the NRC – 2001 standards, equal to 7.2 and 2.4 % respectively, obtained by dose – response method based on dozens of experiments. The norm of histidine was 3.5%, which closely corresponds to the indicator of 2.4 and 2.7 % MP [74], obtained by the incremental addition method. This indicates that the presented model is distinguished by sufficiently high accuracy and is comparable with the models developed by the dose – response method. However, the determination of the need of cows for amino acids in this model is much less expensive than the dose – response method. The need for the absolute amount of metabolizable essential amino acids (MEAA) for milk production (35 kg/d, yield milk protein 1103 gytt6) and maintenance cow - 600 kg, g/d: lysine - 178, methionine - 59, arginine - 119, histidine - 60, isoleucine - 138, leucine - 248, phenylalanine - 152, threonine - 134, tryptophan - 38, valine - 174; the need for only milk production, g/d: 130; 42; 81; 42; 95; 175; 98; 74; 25; 112; the need for only maintenance, g/d: 50; 16; 38; 20; 43; 73; 54; 60; 14; 64; the need for 1 kg of milk (31.5 g of protein) g/kg: 3.7; 1.2; 2.3; 1.2; 2.7; 5.0; 2.8; 2.1; 0.7; 3.2; need to maintain, g / kg 0.75: 0.41; 0.14; 0.31; 0.16; 0.35; 0.60; 0.44; 0.50; 0.11; 0.53. In addition, the article presents the norms of amino acids per 1 kg of dry matter (DM) ration. However, the proposed standards need a comprehensive assessment in the research and practice of dairy farming. Research is needed to improve the models and predict the MEAA in the rations in the following areas: studying the metabolism of amino acids in the body of cows and determining their costs for maintaining the digestive tract, tissues and organs, refining, on this basis, the utilization of amino acids for milk protein production and maintenance; the development of ideal amino-acid profile of low-protein diets, both due to the adjustment of natural ingredients, and through the use of amino acid preparations that are protected from disintegration in the rumen