Abstract
Researches were conducted in 2019-2020 in the department of closed artificial agroecosystems for plant growing on the basis of Federal State Budgetary Scientific Institution “Federal Scientific Agroengineering Center VIM”, Moscow. The object of the study was the seeds of tomatoes Solanum lycopersicum L. The aim of the research was to study the effect of a biostimulant (succinic acid) on biological characteristics and productivity of Solanum lycopersicum L. grown in the substrate hydroponics of a climatic chamber. As a result of conducted researches, there was identified the most effective method of using succinic acid as a biostimulator – inoculation of seeds, which contributed to an increase in yield with a significant rise in relation to the control – 64.1%. The average fruit weight in this variant was 114.1 g, which exceeds the control by 37.0%. The complex application of the biostimulator provided an increase in the average fruit weight in 18.6%, the addition of hydroponics to the nutrient solution is 4.1%.
Highlights
Soil-free cultivation of vegetable crops in closed agroecosystems is a promising and economical alternative to open lands due to high productivity, environmental safety and excellent quality of finished products
The aim of the research is to study the effect of the biostimulant on biological characteristics and productivity of Solanum lycopersicum L. grown in the substrate hydroponics of a climatic chamber
Observations in the experiment showed that the most intensive growth in tomato plants was observed in the flowering phase of 1.82.4 cm per day with the highest value in the variant with pre-sowing seed treatment and the addition of hydroponics to the nutrient solution (Fig. 1)
Summary
Soil-free cultivation of vegetable crops in closed agroecosystems is a promising and economical alternative to open lands due to high productivity, environmental safety and excellent quality of finished products. High performance is achieved by adapting the indoor climate in terms of controlling lighting, temperature, and relative humidity, as well as minimizing interaction with the outdoor climate [1, 2]. Tomatoes belong to the family Solanaceae and the genus Solanum. They are the most popular vegetable crop, and the most cultivated vegetable in the world (4.7 million hectares) [3]. Tomatoes are widely used as a model culture for various physiological, cellular, biochemical, molecular and genetic studies. Tomatoes are grown in greenhouses or growth chambers in soil, substrates, or aeroponically, without a substrate [4]
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