The aim of the study is to increase the morphological and functional status of cows depending on their physiologi-cal state. The morphological composition of blood is one of the main informative systems and has long attracted the attention of researchers. Blood, as a co-single tissue, has been studied well enough. Its indicators are the main fac-tors in determining the state of an animal health, as well as pointing out the presence of pathological processes in inside the organism. To determine the effect of complex use of STEMB (embryonic stimulator) and Uteromastin on the blood parameters of cows in comparison with individual administration three groups of pregnant cows (7.0-8.0 months) were formed separately, each with 20 heads in compliance with the method of groups-analogues (experimental-1, experimental-2, experimental-3). Animals in groups to be examined were provided the same con-ditions both in feeding and keeping. Animals of the first experimental group 25-30 days before calving were admin-istered STEMB drug hypodermic in the neck at a dose of 0.075 ml per 1 kg of live weight with an interval of 7 days three times, animals of the second experimental group were administered the drug Uteromastin 8-10 hours after calving intrauterine at a dose of 150 ml once. Cows of the third experimental group were administered drugs STEMB and Uteromastin in these doses (mixed). The influence of the complex use of drugs STEMB and Utero-mastin on morphological, biochemical and immunobiological parameters of blood of cows were studied on the 15th day after calving. The use of the drugs STEMB and Pteromalid complex improves cellular composition of the blood and indices of the blood serum, which enhances immunotoxicol system of organism of cows.
The aim of the study is improvement of productive and reproductive indices of Holstein animals used in the Russian Federation due to their genomic evaluation using European criteria for this breed. The material for the research was repair heifers in the amount of 20 heads belonging to JSC “Niva” of the Stavropol region of Samara region. The genomic estimation of heifers was carried out in France in order to reveal the degree of the forecast’ reliability of productive, reproductive qualities of heifers. The material for genomic evaluation was taken from the animal’s auricle by puncture. The genomic evaluation revealed that not all heifers correspond to the expected characteristics of their parents’ phenotypic features. The fat and protein content of the milk was positive for all heifers, while the milk content of 7 heifers was negatively correlated. According to the results of genomic evaluation, 3 heifers are classified as excellent, 3 as moderate and 4 as weak heifers. The conducted researches on genomic evaluation of heifers in “Niva” JSC indicate the prospects of its use in selection and breeding work, as further accelerated increase in the efficiency of dairy cattle breeding without the use of progressive methods of evaluation of repair young animals will not allow to increase the productive, native and qualitative parameters of dairy productivity of cows in a short period of time. At present 17 out of 20 genome-appraised heifers have confirmed the results of the conducted researches.
The aim of the study is to increase the production efficiency of the hatching eggs by using the Kamyshenskoye-75 sorghum grain in the layer diet. For research, four groups of laying hens were formed from parent stock of 60 ones each (control, experimental-1, experimental-2, experimental-3). The duration of the scientific and economic study was 52 weeks. The layer diet of the control group was provided by the pedigree producer JV «Svetly». In Layer di-et, grain maize was replaced by sorghum: the first group content – 25.0%; the second group – 50.0%; the third group – 100.0%. The conditions of keeping and feeding of laying hens met the requirements of the parent flock of Hisex Brown. On the basis of the conducted studies, it was established that the balance of nitrogen utilization de-pends on the dose of sorghum grain for experimental layer diet. With sorghum grain in a volume of 50.0% in the layer diet, the balance of nitrogen use was 53.14%, which is more than when using grain sorghum 25.0 and 100.0%, and also exceeds the indicator of the control group by 2.06%. The balance of use of calcium by the control group of laying hens is 0.17% less than in the group with 100% grain maize substitution for sorghum in mixed feed. 50.0% sorghum grain use in mixed feed increases phosphorus performance efficiency by 2.36%, lysine amino ac-ids and methionine compared with the control. Grain maize substitution in mixed feed for the layer hen diet for grain sorghum cultivar Kamyshinsky-75 in the amount of 50.0% increases the nutritional value of mineral and availability of amino acids lysine and methionine.
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