Comparative characteristics of the fuel and energy balances of Algeria and Russia and directions for improving their structure

The development of the grain industry determines the food security level in Russia. Grain is a food product for humans, animal feed, raw material for industries. The research was carried out in 2018-2019 in the Samara region conditions. The research purpose is to determine the effectiveness of nitrogen fertilizing in the winter wheat cultivation. The research tasks included: - to identify the effect of nitrogen fertilization on the winter wheat yield; - to calculate the economic efficiency of using nitrogen fertilizers for winter wheat. As a result of the studies, it was found that in the variant without the use of nitrogen fertilization, the yield of winter wheat was 21.8 cwt/ha and was the lowest. In variants with the top-dressing use, the yield varied from 22.7 cwt/ha, when used as top-dressing of ammonium nitrate to 24.1 cwt/ha when used as an additional fertilizing of KASS. The increase in yield from fertilizing with nitrogen varied from 0.9 cwt/ha (4.1%) to 2.3 cwt/ha (10.6%). From an economic viewpoint, the most effective option was the application of nitrogen fertilizers KASSA, which made it possible to obtain an economic effect of 1240.95 rubles, while reducing the cost by 165.6-628 rubles/cwt and increasing the profitability level by 57.5-66.1%. The results obtained make it possible to recommend the production of the use of liquid forms of nitrogen fertilizers for feeding winter wheat, contributing to an increase in the profitability of crop cultivation.

Section: Methodsmentioning

confidence: 99%

“…Grain crops occupy 35% of the world's arable land [1][2][3]. Grain is a food product for humans, animal feed, raw material for industries and bioenergy production [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

The effectiveness of nitrogen fertilizing in the cultivation of winter wheat

Zhichkina

Zhichkin

Vlasov

et al. 2022

“…The research methodology was based on the methods of mathematical modeling and computational studies using a computer, instrumental studies of the physical characteristics of the greenhouselivestock complex, the theory of similarity, and static processing of experimental data [8].…”

Section: Methodsmentioning

confidence: 99%

“…The current stage of agricultural construction is characterized by a tendency to expand the greenhouse economy and mobilize everyone, including technical means to increase the productivity of greenhouses. This trend is aimed at solving the problem of providing the population with fresh vegetables in the required quantities throughout the year and, which is especially important in the cold period from October to May [7][8].…”

Section: Introductionmentioning

confidence: 99%

Mathematical modeling of greenhouse-livestock complex heated by solar and bioenergy sources

Ergashev

Fayziev

Tilavov

et al. 2022

The article develops a mathematical model of the heat supply system of the greenhouse complex, taking into account the free heat flow in the animals, solar energy, heat energy stored in heat accumulators and developed through the program MATLAB / Simulink. In the development of a mathematical model of the heat supply system of the greenhouse complex, a block diagram of the equation in the program MATLAB / Simulink was developed, without taking into account the change in air density and specific heat capacity with temperature. According to the graphic results obtained for the daily value of solar radiation 500 W/m2, outside air temperature, -6 °C in Karshi, the air temperature inside the greenhouse rises to 22 °C, water tank battery temperature to 13 °C, underground heat accumulator temperature to 17 °C. can be seen. while the amount of total solar radiation was 300 W/m2, this figure was found to be 14 °C, 9 °C, and 12 °C.

“…This method today remains the most practical for low-grade heat supply systems. The cheapest, readily available, reliable and convenient in operation are batteries with a water or air coolant and a stone nozzle [1][2][3][4][5][6]. Among them, water accumulators are the most heat-intensive.…”

Section: Methodsmentioning

confidence: 99%

Method for determining the optimal value of the specific heat capacity and temperature regime of a short-term heat accumulator of passive solar heating systems with a flat reflector of radiation

Dusyarov

Ergashev

Kholmanova

2022

The article presents the results of the analysis and generalization of the experience of operating residential facilities with solar heating systems, even a slight accumulation of the daytime excess heat of solar radiation is determined, which can significantly increase the replacement coefficient of the heat load for heating the systems under consideration. An unjustified increase in the capacity of the heat accumulator has been determined that does not give a noticeable increase in the replacement coefficient for the heat load of the system. Studied and developed new and improved existing insolation passive solar heating systems. The article shows the results of the analysis and operation of residential buildings with solar systems, it is determined that a slight accumulation of daily excess heat of solar radiation can significantly increase the replacement coefficient for the heat load on the heating of the systems under consideration.