Abstract
Crop exposure to stress during cultivation is known to reduce the yield and to cause the release of allelotoxins from plants into soil. It was assumed that allelotoxin release may considerably affect the vegetable growth in greenhouses and that a decrease in the allelotoxin concentration in greenhouse substrates may improve the plant growth. To verify the assumptions, allelotoxicity and microbial contents were determined in greenhouse substrates in which cucumber, tomato, and pepper plants grew well or poorly. The allelotoxin content was found to be higher and the prokaryote content, lower in the substrates of poorly growing plants. The finding confirmed the assumption that allelotoxins significantly influence the cultivation of vegetables in greenhouses. Treating the plant root zone with humate solutions having a high allelotoxin absorption capacity appreciably improved the cucumber plant growth and was assumed to provide a promising means to increase the vegetable yields in greenhouses.
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Notes
The productivity in a greenhouse is several tens of times higher than that in open fields.
Screening and ventilation are used when the greenhouse temperature is too high, and supplementary lighting is used when the PAR level is insufficient.
Maximal water content in one of the greenhouse substrate samples examined.
A difference in relative PSA between well and poorly growing plants was 20–30%.
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The work was carried out with the financial support of the Russian Science Foundation (project no. 22-14-00107).
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Translated by T. Tkacheva
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Shoba, S.A., Gracheva, T.A., Fedotov, G.N. et al. Allelotoxicity of Greenhouse Substrates after Vegetable Cultivation. Dokl Biol Sci 510, 172–175 (2023). https://doi.org/10.1134/S0012496623700370
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DOI: https://doi.org/10.1134/S0012496623700370