bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study of non-genetic effects that influences the milk yield in mestizo goats
Authors: Hurtado-Lugo N A , Nolasco C , Jácome N J 
Published: November 2019

Abstract
The objective of this study was to determine the influence of environmental factors on milk yield in mestizo goats. Analyses of variance was performed for milk yield for test-day in the last third of lactation. The information for this study was taken from the goat production system of the Universidad Francisco de Paula Santander, Seccional Ocaña. The productive system has 90 animals, of which 840 samples of milk belonging to 20 goats were analyzed. Milk yield averages for 5th months lactation and 6th months lactation were 1.29±0.85 kg and 0.95±0.55 kg, with coefficients of variation from 29.11% to 39.46%, respectively. The initial results with the available information suggest that the non-genetic effects of birth month and year (and their interactions) were highly significant. While, the covariable age (linear effect) was not significant in any milk yield for test-day and the quadratic effect was highly significant and significant for fifth and sixth month of lactation, respectively. Consequently, it can be suggested that test-day milk yield in mestizo goats of Ocaña’s region is influenced by non-genetic factors such as the month, year and age of the female at kidding.
Implementation of a physical model to determine the hydraulic behavior of mountain rivers
Authors: Cely N J , Varón Y P , Fuentes R M 
Published: November 2019

Abstract
The present work consisted in the implementation of a small-scale physical model of a mountain river according to the similarity conditions that these models must satisfy, this model was implemented in a channel with measures 200 cm length, base 20 cm and height of 15 cm; a variable slope between 1% and 5% was handled, it was evaluated with the design conditions of open-flow channels, developing a methodology of physical modeling of channels and rivers of mobile bottom without distortion, according to a turbulent flow over rough contour, so that the values determined in the physical model complied with the laws of similarity and represented the most accurate way to a mountain river. The results showed a minimum flow of 8.03 l/s and a maximum of 17.96 l/s in the physical model, which in the prototype represents a flow of 284 m3/s and 635.04 m3/s respectively. On the other hand, it was determined that the average diameter of the granular material required in the physical model is 2 mm corresponding to an average diameter of 100 mm for mountain rivers.
Loss prediction model of a 850 MHz system using radio wave recommendations for terrestrial services
Authors: Herrera J E , Trujillo C 
Published: November 2019

Abstract
In the implementation of radiocommunication links necessary to determine the possible coverage areas for mobile communications services in urban environments, through modeling and statistical prediction by means of measurements of signal intensity in the field; therefore, it is necessary to have recent and updated mathematical models to predict the propagation losses considering the most appropriate correction parameters according to the working frequencies. The research focuses on establishing the losses obtained by means of power measurements according to the regulations of the International Telecommunications Union of a mobile radio system in the city of San José de Cúcuta, Colombia, in order to estimate the coverage and compare the performance of the model obtained with models similar.
Influence of zircon, mineral fertilizers on spring wheat yield in gray forest soils of the Republic of Tatarstan
Authors: Amirov M F , Serzhanov I M , Shaikhutdinov F Sh , Gilyazov M Yu , Karimov H Z 
Published: November 2019

Abstract
The formation of the yield by crops is influenced by many factors and the state of the plant itself. The purpose of the study is to determine the efficacy of the preparation Zircon in combination with mineral fertilizers and seed protectant for the formation of spring wheat yield. The research is conducted at the experimental field of the Kazan State Agrarian University in years 2016-2018, with Yoldyz, a regional variety of spring wheat. Seed treatment with growth regulator Zircon increases yield on the background without fertilizers amounts to 0.14 t/ha and 0.21 t/ha without fertilizers and with fertilizers, respectively. Seed treatment with growth regulator Zircon and protectant Dospekh 3 provides the yield increase of 0.18 t/ha without fertilizer additions. When fertilizers are added yield increases by 0.29 t/ha and 0.35 t/ha, for N61P55K55 and N120P126K97, respectively. In this case, return of fertilizers of the grain per 1 kg D. V. makes fertilizers N61P55K55 increase to 7.89 kg, while N120P126K97 amount to 5.57 kg.
Assessment of the factors influencing the fertility of dairy cows
Authors: Nikulina N B , Sycheva L V , Aksenova V M 
Published: November 2019

Abstract
The assessment of factors of reproductive dysfunction of dairy black and white cows of second-third lactation breed weighing 450-500 kg was made in one of the breeding farms of the Perm region. The conditions of keeping animals did not meet the zoo-hygienic standards. For lactating cows a concentrate type of feeding was used. In the structure roughage feed mixture occupied 15% is juicy 25.1 %, concentrated – 59.2 %. The digestible protein content in 1 ECU was 123 g, the sugar-protein ratio was 0.4: 1, the ratio of calcium and phosphorus was 1.2:1, the fiber content of dry matter – 19 %. The preclinical stage of development of postpartum inflammatory processes in the uterus of some animals was noted; the development of clinical metritis of other animals was noted. The decrease in the amount of glucose, reserve alkalinity, carotene, magnesium and a simultaneous increase in the content of ketone bodies was typical of blood of cows with clinical signs of diseases of the uterus as compared with those animals in the premorbital state of reproductive pathology.
Comparative histomorphological characteristics of the endometrium of young and aged mares in estrus and diestrus
Authors: Dubrovskaya A B , Lebedeva L F , Schukis K A 
Published: November 2019

AbstractThe histomorphometric indices (height of the lining (LE) and glandular (GE) epithelium, diameters and density of glands) in endometrial samples (n=21) of young gynecologically healthy mares of 3–8 yo (n = 4) and older problem mares of 12–19 yo (n=7) were studied in estrus and diestrus of one cycle. The height of the LE and GE in aged mares was slightly higher than in young ones, but the difference was not significant. It was found significant differences between groups in diameters and density of glands, more obvious in stratum spongiozum (SS) then in stratum compactum (SC) of endometrium. It has been shown that diameter of endometrial glands in older mares was two to three times larger than in young mares in both estrus (55.9-22.5 μm, p<0.05) and diestrus (62.5-20.1 μm, p <0.01), respectively. The density of glands in SS in young mares in diestrus significantly (p<0.01) increased, compared with this in estrus (9.8-17.5 units/field), while in older mares it almost did not change (11.1-11.3 units/field). The difference of histomorphometric indices in estrus and diestrus can serve as indirect characteristic of an elasticity of an endometrial tissue probably connected with clearance of the uterus. Therefore the double biopsy carried out in estrus and diestrus can be useful for endometrium function assessment in mares.
Formation of element status at chickens when using enzyme, probiotic and antibiotic agents in food
Authors: Lebedev S , Nikitin A Yu , Fisinin V I , Egorov I A , Miroshnikov I S , Ryazanov V A , Grechkina V V , Kvan O V 
Published: November 2019

Abstract
The paper considers the biological effect of probiotic, enzyme and antibiotic agents on metabolism, efficiency and the element status of chickens. Joint inclusion of soybean-bifidum (0.7 ml/kg of feed), Tselloviridin G20x and Biovit-80 resulted in the increase of the egg weight by 9.8 and 9.0%, respectively in comparison with other groups. The group receiving Sporobacterin (10 ml/kg of feed) with feed was characterized by high fat availability (68%). The greatest conversion of feed gross energy was observed in groups in case of joint inclusion of Tselloviridin with probiotic and antibiotic agents (2.8 and 3.0%) and crude protein (6.2 and 7.0%). The spectral microelement analysis showed that the additional inclusion of biologically active agents caused their redistribution towards the increase of the need for main micronutrients for metabolism. All groups were characterized by a reliable increase of essential and conditional-essential elements such as Ca, K, Mg, Na, P, Cr, Cu, Fe, I, With, Mn, Se, Zn against the background of decrease such toxic elements as As, Al, Ag, Sr, Pb, Cd. The received results confirm the modeling role of probiotics, enzymes and antibiotics in the exchange of micro- and macronutrients.
Green forage in radioactive flood meadows
Authors: Smolskii E V , Silaev A L , Dyachenko V V , Nechaev M M , Mameeva V E 
Published: November 2019

Abstract
The flood meadow was analyzed in the conditions of radioactive pollution of the territory to study the effect of mineral fertilizer on the efficiency of a meadow and 137Cs content in green grass stand. The experiment was conducted in alluvial meadow sandy soil with 137Cs pollution density of 559-867 kBq/m2 in the subzone of soddy-podzolic soil of southern taiga of the Belarusian province of sod-podszolic slightly humic soils and low-land swamps. The study revealed that the efficiency of natural grass stand is low, the introduction of mineral fertilizer increased the productivity of green grass stand of a meadow to 37 t/hectare with nitrogen fertilizers being the main factors. The decrease of 137Cs in green grass stand triggered the use of potash fertilizer. The use of a flood meadow as a pasture at 137Cs pollution density of over 555 kBq/m2 is impossible for livestock production satisfying norms on 137Cs content in milk and meat without the use of mineral fertilizers.
The cultivation of Sorghum Bicolor using no-till technology and a complex biological substance
Authors: Melnichuk T N , Izotov A M , Turin E N , Zhemchenko K G , Gongalo A A , Zubochenko A A 
Published: November 2019

Abstract
This research is aimed at studying the influence of no-till technology on the cultivation of Sorghum bicolor using a complex biological substance in comparison with traditional technology. Such parameters as growth and development of plants, yield, the quality of crops based on the quality of previous winter barely crops are considered. The research was carried out in 2016–2018 during a stationary experiment in the steppe of Crimea. The soil of an experimental plot is represented by a mycelial-calcareous black soil. The plough layer contains 4.4 mg of movable phosphates and 39.1 mg of exchangeable potassium per 100 g of soil. The weighted pH average is 7.5. The climate of the steppe agroclimatic region is extremely continental. The annual precipitation is 413 mm. The annual temperature is 10.4 °C. The yield of sorghum cultivated with traditional methods was 1.51 t/ha and 1.44 t/ha in the case of no-till technology (the least significant difference(0.5) is 0.21 t/ha). That means there is no decrease in yield in terms of direct seeding. Despite the lack of tilling in case of direct seeding, the yield is on the same level with both techniques. The use of a complex biological substance increased the yield of sorghum by 0.11 t/ha. The inoculation of seeds in the case of no-till technique helped to positively increase the yield by 0.22 t/ha in comparison with classic technology. In the case of traditional methods, the inoculation of seeds in the biological substance didn’t impact the yield. The mass fraction of ash varied depending on the studied variants from 2.40% to 2.58%, which didn’t provide a positive increase in this parameter. The traditional method, accompanied by the use of a microbial substance, gave a positive increase in the mass fraction of protein by 1.34% in comparison with a control sample and by 1.66% in comparison with direct seeding, accompanied by inoculation. The content of crude fat varied between 3.34% and 4.43%. In the case of no-till + inoculation, this parameter is 0.53% higher than in the case of no-till without inoculation. The traditional seeding with and without inoculation positively decreased the content of crude fat in comparison with direct seeding.
The effect of biologized methods of potato cultivation in organic farming on its yield
Authors: Maksimov D A , Minin V B , Ustroev A A , Melnikov S P , Murzaev E A 
Published: November 2019

Abstract
The results of experimental studies of the dependence of potato yields on the application of the BIOGUM compost, biological plant protection products and technological methods of tillage and plant care are presented. The experimental and analytical methods were used. The whole range of agricultural practices has a significant impact on the potato yield. The deep loosening between rows is promising and can increase the yield by 57%. The use of Vitaplan, SP has a significant effect on the potato yield. It increased the yield from 17.8 t/ha to 25.3 t/ha, i.e. by 7.5 t/ha or 42%. The use of biofungicide along with the compost made it possible to produce the yield of 29.2 t/ha, and increase it by 64%. The dependencies can be used for developing biologized technologies of potato cultivation in specific economic conditions.
Influence of pre-sowing priming on the parameters of Pisum sativum seedlings
Authors: Galaktionova L V , Korotkova A M , Voskobulova N I , Lebedev S V , Terehova N A , Gavrish I A , Ermakov A A 
Published: November 2019

Abstract
One of the important methods of increasing the yield of cultivated plants is to reduce the yield of crops is pre-sowing treatment of seeds with modern preparations containing various elements and compounds in the nanoform. The aim of the work is to study the influence of pre-sowing treatment of pea seeds by suspension of iron and silicon oxide nanoparticles on germination and morphometric parameters of seedlings. As a result of the experiments with different compositions of seed treatment, it was observed that in the variants of the experiment using a mix of NPsSiO2 and Fe3O4, as well as a variant of Fe3O4 in a concentration of 10−3 mg/l, the germination of beans reached maximum values. In the course of the experiment in conditions of the laboratory experiment studied the effect of processing on pigments. The restructuring of the pigment apparatus was largely associated with an increase in total chlorophyll and carotenoids against the background of the use of a whole range of solutions for treatment with the maximum effect of increasing their concentration when using Fe3O4 (10−3 mg/l), SiO2 (10−3 mg/l) and SiO2 (10−4 mg/l) by the 35th day of the experiment in the green mass of plants.
Cumulative indicator of quality of grain for strong wheat for conditions of strongly continental climate
Authors: Sandakova G N , Besaliev I N , Panfilov A L , Akimov S S 
Published: November 2019

Abstract
Durum wheat is second in importance after soft wheat for many countries of the world, its area is about 10% of common wheat sowing, and world grain production reaches 15-20 million tons. Identification of the role of climatic predictors in the formation of spring durum wheat on Based on the construction of computer models using the methods of mathematical modeling, it is of particular importance for agriculture.Earlier studies to identify the relationship between indicators of grain quality of durum wheat and weather predictors allowed us to establish that the formation of indicators of grain quality occurs under different weather conditions.In the work on the basis of a large experimental material on the quality of grain of two varieties of spring durum wheat, agrometeorological data of the Orenburg Regional Center on Hydrometeorology and environmental monitoring for May-August 1967-2017. Multiple regression models of the influence of weather predictors on the main indicators of the quality of hard wheat grain were built. Based on the solution of the system of regression equations, an integral indicator of the quality of spring hard wheat grain was developed for conditions of a sharply continental climate.
Conceptual basis of methodology of improving the technology of water use for irrigation and watering systems
Authors: Vasiliev S M , Bondarenko V L , Senchukov G A , Gostischev V D 
Published: November 2019

Abstract
The paper studies the formation and use of water resources on existing irrigation and watering systems (IWS) of Stavropol territory in cause-effect relation with the global problems of Energy, Water and Food defining the tendency of modern development of agricultural production thus meting the vital food needs in social development. Both at the level of the global system “Nature-Society-Person” within terrestrial biosphere and at its hierarchical levels of river basin geosystems, where water resources are formed, agricultural production is carried out on existing IWS, on the example of the Kuban, Terek and Lower Don rivers and with the population of over 23 million people, the modern social development is characterized by a stable tendency towards water finiteness in limited conditions for further development. The analysis of formation of water resources within the spatial limits of basin geosystems and their subsequent use on IWS determines the technological scheme of water use on irrigated lands. The problems of Energy, Water and Food in agricultural production on irrigated lands, as it was established in the processes of their systemic interconnection, interaction and relationship on current IWS of the Great Stavropol Canal have identified the dominant problem, according to which there is a need to take into account the geomorphological characteristics of the earth’s surface topography, geological zoning of the Stavropol territory, development of the methodology to improve energy efficiency of water resources using both non-renewable and renewable sources of energy in accordance with system principles: “system integrity”, “reflection of objective reality”, “ecological suitability”, “vital purposeful activity”. Seven conceptual statements of Ecological Suitability contributing to new ideas for the creation of new and improvement of existing IWS were developed within the concept of “ecological suitability” for IWS operating within NTS “NE – IWS – P” based on basic system principles.
The effect of grazing intensity on the productivity and floral diversity of natural pastures of the Volgograd Trans-Volga region
Authors: Tkachenko N A , Koshelev A V 
Published: November 2019

Abstract
Arid pastures, which account for 50-75% of the country’s natural fodder lands, are a unique natural territory of the Russian Federation. However, more than a half of the pasture areas, which are concentrated in the Caspian Sea region, are to some extent degraded. In Volgograd Zavolzhye, due to the plowing of virgin lands, overgrazing and irrational use of agricultural land, an outbreak of deflationary desertification occurred in the 70-80s. At present, the region continues to use its land resources unabatedly, which has led to the intensification of degradation and desertification processes on pastures and a decrease in their productivity. Feed-valuable species have disappeared or become rare. Coenotically and floristically full-membership pasture phytocenoses have become incomplete, biologically impoverished communities, so maintaining ecological balance, productive potential of pasture ecosystems and restoration of their biodiversity is a fundamental task for the region.
Technique and results of experimental studies of specific cost determination of tractors maintenance during implementation of different methods
Authors: Chubareva N V , Khabardin V N , Chubareva M V 
Published: November 2019

Abstract
Maintenance of tractors in the agricultural enterprises and country farms of the Irkutsk region is carried out by three ways: centralized; decentralized; combined. Each object is expressed by the specific cost of technical tinning in which maintenance-1 and maintenance-2 are considered, and on the decentralized and combined objects in addition – specific costs of maintenance-1 and maintenance-2. The technique of determination of specific cost of maintenance tractors provides obtaining numerical values of an indicator assessment of the choice means maintenance tractors. Results of experimental studies show that the mathematical expectation of specific cost of maintenance tractors by the centralized method has the minimum value (133 rub/engine hour) that is 24.8% less than mathematical expectation by the decentralized method and on 21.1% – by the combined method. This results from the fact that at the decentralized and combined methods the agricultural enterprises in addition have costs of acquisition maintenance unit, its contents and intended usage. When accounting working conditions of the operator in the field – at the decentralized and combined methods of expense also increase at the expense of additional costs respectively of 11.3% and 2.2%. at the combined method additional expenses are 4.8 times less, than at decentralized due to carrying out in field conditions only of maintenance-1.
Research results of cutting horticultural raw material using chip slicer with a zigzag knife in reverse direction
Authors: Leded N I , Ceplyaev A N , Averina M B , Ulianov M V , Kuryshev O O 
Published: November 2019

Abstract
The general view and description of the operation of a chip slicer for horticultural raw material is presented. Theoretical studies of the cutting process using the proposed device are carried out, with an adequate obtained mathematical, which includes the geometrical description of the interaction between the raw material and the proposed cutting device, with its algorithm created in a computer program. An experimental sample of a chip slicer for horticultural raw material, as well as that of a cutting device (a zigzag knife wall with the straight or reverse knife location) is developed and produced. The cutting forces are experimentally determined, depending on the geometrical parameters of the cutting device. The positive effect of using the cutter is a decreased energy consumption of the process, as well as the minimum destruction of the structure of the raw material processed, and high productivity.
Application of a structural-topological model in the optimization of the working elements of a combine harvester
Authors: Tronev S V , Ovchinnikov A S , Ryadnov A I , Bocharnikov V S , Fedorova O A , Fomin S D , Skvortsov I P , Dugin J A , Sedov A V 
Published: November 2019

Abstract
A structural-topological model is developed, which is presented in the form of connected graphs of the technological flows of grain and spike. Taking into account this model, the use of the main and additional formal features when searching for a non-optimal working element of a combine harvester is justified. For the reaping part, the search for a non-optimal working element is performed on the main formal basis, which characterizes the implementation of the main component of the principle of harmony of the structure. Due to the presence of common arcs of controlled and uncontrolled flows along simple chains, cuts in which two or more working elements, as well as the presence of circulating flows in the threshing machine of the combine, it is necessary to exclude the influence of circulating flows on the process when searching for a non-optimal working element. The search for a non-optimal working element of the thresher is performed on the basis of an additional formal feature, which is characterized by a decrease in the amount of flow along the controlled flow or an increase in the flow through the uncontrolled flow from the circulation flow.