Lipid metabolism is one of the most fundamental elements in adaptation, including stress implementation mechanism in poultry. The study was aimed at assessing the individual indicators characterizing the level of lipid metabolism in chickens with different resistance to stress. Stress reaction was simulated under conditions of industrial environment. Lipid profiles were studied in the blood plasma taken from the parent flock of Hubbard F15 cross meat-type chickens at the age of 41 weeks. The chickens were subjected to the stress by subcutaneous administration of turpentine according to the method developed by A.V. Miftakhutdinov (2012). Blood samples were taken 60-90 minutes after administration. Adaptive responses of the chickens to the stimulus were characterized by a specific lipid metabolism expressed in a higher increase of triglycerides in blood plasma (on average by 2.3 times in the groups), the amount of lipoproteins of low and very low density (on average by 3 times in the groups) and total cholesterol (on average by 2.3 times in the groups). In comparison with stress-resistant chickens, stress-sensitive chickens showed more evident increase in the concentration of triglycerides (by 1.9 times) and cholesterol (by 64%) in 60-90 minutes after the administration of turpentine. It was due to the prevalence of cholesterol in very low density lipoproteins and reduction of cholesterol in low and high density lipoproteins. The confirmation of diagnostic value of the assessment of resistance to stress and its correlation with lipid metabolism are economic and biological qualities of chickens. Reproductive qualities have a high correlation coefficient (r > 0.75) with the level of stress sensitivity of chickens.

Poultry industry is one of the main agricultural sectors in Russia. The poultry industry includes quail breeding. Quails are characterized by early maturation and do notrequire large areas. The pressing issue is the search for approaches to improving quality of feed and feed additives for poultry. The objective of the work was aimed at studying the impact of waste products of wax moth larvae on hematological parameters of Japanese quails. The following blood parameters were examined: white blood cells, red blood cells, hemoglobin, hematocrit, mean corpuscular volume, mean corpuscular hemoglobin, red cell distribution width. The research was carried out at Moscow Timiryazev Agricultural Academy in 2015-2016. The control group received mixed feed PK-5 from 1 to 6 week, and from 6 week - PK-1. The 1 and 2 test groups received a feed additive in a 1 and 2% concentration. The waste products of wax moth larvae are 3-4 mm dark granules with characteristic odor. The analysis of hematological parameters revealed that the waste products in a 2 % concentration added to the basic diet had a positive impact on the hemoglobin content. This parameter in the test group was 25.4 % higher than that in the control group. It indicates better oxygen supply.

In recent years, the share of wheat and soybean meal with a 48% whole protein content has significantly increased in the feed for broiler chickens at different rearing periods. The application of these ingredients and others increases exchange energy and whole protein content. Under these circumstances, it is necessary to create conditions for the preservation of digestive enzyme activity. Water with acidifiers preserves beneficial microflora in the gastrointestinal tract of poultry. The article presents the data on two experiments on the effectiveness of acidifiers during broiler rearing. The study revealed that application of Aquasafe has a positive effect on the liveability of broiler chickens. The acidifier increased body weight of broilers by 3.2%, Velegard - by 3.7%. The profit after the application of acidifiers was higher than in the control group. In comparison with the control group, the profit in the first experiment increased by 17.9% and in the second one - by 13.9%.

The article gives the data on the body conformation of Tuvinian short-fat-tailed sheep with different types of feeding behavior. Since the conformation is a breed characteristic, it was a criterion to assess animals. The research was carried out on Tuvinian short-fat-tailed ewes at the age of 3 years. The animals were divided into 3 groups on the basis of feeding behavior. The body conformation was studied from linear measurements of points. The physique index was calculated from the data on the measurements obtained. The animals were divided into groups according to the motor feeding response. This method assesses the individual behavior of sheep in a flock and characterizes their feeding, passive defensive and orienting response to the change of typical feeding procedure. The first type was termed as “strong fast gaining balanced type” (I group), the second one - “strong fast gaining unbalanced type” (II group), and the third one - “weak slow gaining type” (III group). The research revealed that the first group was characterized by a well-developed height measurements, chest girth and oblique length of the body. The ewes of the first type had a sound constitution with developed parts of the body, they were larger. The I type had higher massive indices than the others. The first group also had advantage in meat indices. The ewes of the III group had longer legs.

The article represents a hybridological analysis with the aim of studying the character of inheritance and identification of new allelic blocks of the components of gliadin-encoding loci in F₂ hybrid grains obtained from interspecific crosses of durum wheat sample v. hordeiforme GR 8670 and a sample of a tetraploid wheat species T. dicoccum v. farum (Azerbaijan). The research is based on the hybrid grains F₂ obtained from the crossing of local durum wheat GR 8670 v. hordeiforme (2n = 4x = 28) with a local sample of a cultivated spelled gingerbread (T. dicoccum v. farum, 2n = 4x = 28) with the Au Au BB genomic structure. The allelic blocks of the gliadin components have been identified in the electrophoregram of the gliadin storage proteins in 96 grains of the hybrid F₂ generation by polymorphism and the frequency of occurrence of these alleles in the hybrid generation. The study of the hereditary nature of the alleles of gliadin-coding loci of storage proteins of F₂ hybrids in the maternal form v. hordeiforme GR 8670 durum wheat made it possible to identify new allelic blocks Gld 6A9 and Gld 6A22. New allelic blocks of the Gld 6B19 and Gld 6B20 components were identified by the EF-analysis of the storage proteins of gliadin tetraploid wheat T. dicoccum v. farum (father form).

The productive capacity of Krupinka - new winter durum wheat variety - was studied in meadow chestnut heavy loam soils in the plains of Dagestan under irrigation conditions. The objective of the study was aimed at developing resource-saving cultivation technology for the new wheat variety. The study was based on the calculation of effective doses and time of application of mineral fertilizers in various cultivation technologies. The resource-saving cultivation technology under irrigation conditions in the plains of Dagestan was developed for the new wheat variety. This technology increases grain yields by 25-30%. The study conducted in 2014-2017 showed that the highest yield (6.23 t/ha) was obtained after administration of mineral fertilizers (N₁₈₀P₁₀₀) and semi-fallow tillage. The yield in the control after the same tillage technology and absence of fertilizers was 3.10 t/ha. The yield in the variant with the irrigated semi-fallow tillage was 6.4% (0.401/ ha) lower than that in the optimal one. The study showed that the best field germination rate (81.9%) and plant population rate (393 pcs/m²) were obtained in the variant with semifallow tillage and mineral fertilizers administered at a dose of N₁₈₀P₁₀₀. These rates were 6.8 and 6.4% lower in the variant with irrigated semi-fallow. The doses and time of application of mineral fertilizers had a significant impact on the productive capacity of Kupinka.

The environment in Uzbekistan is characterized by large amounts of heat, insufficient rainfall and saline soils. It explains the need to study the resistance of plants to abiotic stresses. The salt tolerance of plants is determined by their capacity to vegetate and produce satisfactory yields of economically valuable products in saline soils. The objective of the study was to test common wheat varieties for salt tolerance with subsequent selection of varieties with high tolerance to salinity. The testing of common wheat varieties for salt tolerance under irrigation conditions was carried out in Galla-аral Branch of Uzbek Research Institute of Grain and Legume Crops. At the first stage, the identification of 315 common wheat varieties was performed on Hosildor. The study revealed positive correlation coefficients in the weight of 1000 grains, number of nodal roots and length of coleoptile. 4 common wheat varieties with high salt tolerance under irrigation conditions were also selected.

The development of intensive fruit growing in Uzbekistan is aimed at using plants with less developed habitus of aerial parts. Such technique significantly increases the number of plants per unit area and reduces financial costs of plant care and harvesting. To improve the cultivation technology for pear seedlings and to increase yields, it is necessary to carry out a research on new vegetatively propagated rootstocks of quince, which are widely used in other countries. The research was conducted at Tashkent State Agrarian University in 2016-2018. The article presents the data on the impact of technological characteristics of individual elements of grafting of quince rootstocks by budding. The following vegetatively propagated rootstocks were used for the research: “A”, “S-А”, “R₃”, “R₄”, “R₅”, “Alushtinskaya”, “ВА-29”, “Hersonskaya” and “U”. It was established that a spine left after budding with a varietal bud had an impact on the preservation of grafted trees during the autumn and winter. During these periods the best preservation of grafted trees was recorded on almost all dwarf vegetatively propagated quince rootstocks, if spines were removed in early spring. In that case the preservation of budded buds was 86-92%, at the same time plants with spines showed 75-81% preservation.

The study was conducted in the teaching and experimental farm of the Tashkent State Agrarian University in 2014-2017. As a research object, a large-hulled seedless grape variety Kishmish Batyr of five years of age planted according to the 3.0x2.5 meter scheme was used in the Republic of Uzbekistan. The agrotechnical background in the experimental plot was maintained according to the generally accepted scheme in the republic. In the course of the study, the growth and development of the experimental plants on the plots were carried out with phenological observations and biometric counts - the number of buds developed due to the load, the number of fruitful shoots, the number of inflorescences, the productivity of shoots, the coefficient of fruiting of shoots and yield. The study found that in the conditions of the foothill zone of the Tashkent region, the autumn load should be 160 buds per bush, or 9 buds per shoot, where the crop reaches 12.74 tons per hectare.

The study was conducted at Galla-аral Branch of Uzbek Research Institute of Grain and Legume Crops. The study was on “Reduction of load on the use of natural resources as a result of competing cultivations methods for unirrigated arid lands in mountain, semi-arid and desert landscapes of Uzbekistan”. The study revealed that zero tillage is effective only in a grain-fallow-hoed crop rotation with a short rotation (naked fallow - wheat - wheat) in the bogara. Zero tillage with direct seeding and no-till technology “AGROLEAD” showed higher yields of wheat grain in comparison with the tillage with a single-furrow plow conducted in the autumn. It was due to higher plant population rate and better water regime of soils. Due to nitrogen-fixing ability, leguminous crops (chickpea) are good predecessors for wheat under conditions of bogara. The optimal tillage system is the most important agrotechnical measure to obtain stable and high yields of grain and other products in the bogara.

The objective of the study was aimed at developing science-based technologies for efficient use of collector and drainage waters in the Bukhara region. The article provides the study on different technologies of preparation of saline water to the irrigation of crops. Special attention was given to the reduction of mineralization of collector and drainage waters by growing common duckweed (Lemna minor). Common duckweed is characterized by salt tolerance and need to salts in water. To conduct the study, a pool was made. Drainage water was dumped into the pool with Lemna minor. It was established that Lemna minor can effectively neutralize toxic salts up to 22-28% in drainage waters. The application of collector and drainage waters purified by biological method increased yields of cotton by 4.2 c/ha.

The article presents the study on the impact of manure-lignin compost administered at different doses on the yield and quality of perennial grasses. The study was conducted in the sod-podzolic soil in Komi. The highest yield was obtained after application of manure-lignin compost at a dose of 1000 t/ha and peat-manure compost at a dose of 200 t/ha. The quality of hay met the requirements of zootechnical science. The high dose of manure-lignin compost increased humus content (up to 6.32%), and mobile forms of phosphorus (up to 1791.2) and potassium (up to 350.1 mg/kg) in the sod-podzolic soil. The indicators in the control were 2.77; 56.2 and 48.3.