Development of an ecological lighting device to reduce the growth time of agricultural plants in greenhouses

Abstract

The use of LEDs in lamps is promising for effective plant growth. Plant growth lamps are designed to create artificial lighting for agricultural crops. This work is devoted to the creation of a smart LED lamp with the ability to adjust the spectral composition of radiation depending on the stage of growth and the type of plant. A number of experiments were carried out to investigate the effect of various radiation parameters on the growth characteristics of dill, parsley, green onion and cucumber seeds. The optimal radiation parameters that contribute to the acceleration of the selected model plants growth were identified. Based on the results obtained, a multi-wavelength LED lamp with an adjustable radiation composition, including blue 440 nm and red 660 nm LEDs, was developed. In the lamp, the possibility of changing the spectral composition of radiation at different stages of growth was realized. Therefore, it is possible to change the light parameters in accordance with the obtained data on the development of crops.

Study of the impact of recultivated granite stone quarry dumps on the environment and agricultural land in the Leningrad region

“…Various reasons contribute to this [10][11][12][13][14][15][16][17][18][19]. One of them is the sharp increase in industry and population [7,12,13,16,[20][21][22][23][24][25][26]. This has led to an increase in the generation of electrical energy and pollution of areas [26][27][28][29][30][31][32].…”

“…One of them is the sharp increase in industry and population [7,12,13,16,[20][21][22][23][24][25][26]. This has led to an increase in the generation of electrical energy and pollution of areas [26][27][28][29][30][31][32]. Because of the need to increase mining for industrial needs, one of the factors of this impact is the excavation of rocks from quarries and the storage of them and waste in dumps.…”

Monitoring of soil pollution caused by industrial enterprises in one of the districts of St. Petersburg

“…The development of technological progress has led to an increase in the load on the technosphere of the planet [1][2][3][4][5][6][7]. Negative processes affect various components of the environment (air, water, green spaces and soils) [2,3,6,[8][9][10][11][12][13][14][15]. The sharp reduction of forests and green areas has led to a decrease in the ability to process emissions of carbon dioxide and other harmful substances [1,3,8,9,[16][17][18][19].…”

Assessment of the level of soil pollution of agricultural lands Kotlin Island

“…Currently, there is a sharp increase in the technogenic load on the Earth's ecosystem [1][2][3][4][5][6][7][8]. There are many reasons for the increase in this load [7][8][9][10][11][12][13][14][15]. In most cases, they should be considered together, since there is a connection between them [9][10][11][12][16][17][18][19][20][21].…”

“…There are many reasons for the increase in this load [7][8][9][10][11][12][13][14][15]. In most cases, they should be considered together, since there is a connection between them [9][10][11][12][16][17][18][19][20][21]. But one of them is common for all cases, it is associated with the lack of proper control on the part of humans over the load on the ecosystem [8-11, 16-20, 22-28].…”