STUDY OF THE EFFECT OF PLANTING SCHEMES AND GROWTH REGULATORS ON ICE SALAD PRODUCTIVITY

Andrey A. Sokolov; Alina Travkina

doi:10.55186/25880209_2026_10_4_39

VAK Russia 4.1.3 UDC 635.4

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STUDY OF THE EFFECT OF PLANTING SCHEMES AND GROWTH REGULATORS ON ICE SALAD PRODUCTIVITY

Published in INTERNATIONAL AGRICULTURAL JOURNAL · Volume 9, Issue 4 · Pages 126–142 · Rubric: 4.1.3. Agrochemistry, agro-soil science, plant protection and quarantine (agricultural sciences)

DOI: https://doi.org/10.55186/25880209_2026_10_4_39 · EDN: CMKGED

Received: 11.05.2026 Accepted: 26.06.2026 Published: 28.06.2026

Authors

Andrey A. Sokolov

Alina Travkina

ORCID

Andrey A. Sokolov

Ryazan State Agrotechnological University Named After P.A. Kostychev docent · agronomii i zaschity rasteniy · Ryazan

Alina Travkina

Federal State Budgetary Scientific Institution "All-Russian Research Institute of Irrigation Systems and Agricultural Water Supply "Raduga" Junior Researcher · Department of Agricultural Water Supply · Russian Federation

ORCID

ABSTRACT

The article presents the results of a study evaluating the effects of planting patterns and growth regulator application on the productivity of Iceberg lettuce under open-field conditions in the Moscow Region. The research was conducted in 2025 on sod-podzolic medium loamy soil at AgroMix LLC in the Kolomna urban district. The object of the study was Iceberg lettuce (Lactuca sativa var. capitata) of Gavrish breeding. A two-factor field experiment was established to assess three planting patterns (30 × 30, 35 × 35, and 40 × 40 cm) and six treatment systems involving the growth regulators Epin-Extra and Zircon, as well as the biological product Fitosporin-M. A positive effect of growth regulators on seed quality, plant growth, and development was established. The highest germination energy and laboratory germination rate were recorded following the combined application of Epin-Extra. Planting pattern was found to have a significant effect on yield formation. The highest average yield of Iceberg lettuce (35.2 t/ha) was obtained with the 35 × 35 cm planting pattern. The application of growth regulators increased yield compared with the untreated control, with the greatest effect achieved through the double application of Epin-Extra, including pre-sowing seed treatment and foliar spraying during the growing season. An interaction between planting pattern and treatment application was demonstrated. The maximum yield of 38.2 t/ha was achieved when the 35 × 35 cm planting pattern was combined with the integrated application of Epin-Extra, resulting in a yield increase of up to 19% compared with the control treatment. The use of growth regulators improved marketable yield, increased head weight, and reduced nitrate accumulation. The results obtained allow recommending a cultivation technology based on a 35 × 35 cm planting pattern and double application of Epin-Extra for Iceberg lettuce production in the Moscow Region.

KEYWORDS

Iceberg lettuce, green crops, growth regulators, Epin-Extra, Zircon, Fitosporin-M, planting scheme, plant density, yield, product quality, open ground, biological products, vegetable growing, and cultivation technology

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Editor-in-chief

Aleksandr Fomin

e-science@list.ru

Editor

Ekaterina Syamina

e-science@list.ru

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GOST

Sokolov A. A., Travkina A. R. STUDY OF THE EFFECT OF PLANTING SCHEMES AND GROWTH REGULATORS ON ICE SALAD PRODUCTIVITY // INTERNATIONAL AGRICULTURAL JOURNAL. 2026. no. 4. pp. 126-142. DOI: https://doi.org/10.55186/25880209_2026_10_4_39. EDN: CMKGED. (Date of access 09.10.2026).

MLA

Andrey A. Sokolov, Travkina A. R.. "STUDY OF THE EFFECT OF PLANTING SCHEMES AND GROWTH REGULATORS ON ICE SALAD PRODUCTIVITY." INTERNATIONAL AGRICULTURAL JOURNAL 9.4 (2026): 126-142. DOI: https://doi.org/10.55186/25880209_2026_10_4_39. EDN: CMKGED.

APA

Sokolov A. A., Travkina A. R. (2026). STUDY OF THE EFFECT OF PLANTING SCHEMES AND GROWTH REGULATORS ON ICE SALAD PRODUCTIVITY. INTERNATIONAL AGRICULTURAL JOURNAL, 9(4), 126-142. https://doi.org/10.55186/25880209_2026_10_4_39 EDN: CMKGED.

Chicago

Andrey A. Sokolov, Travkina A. R.. "STUDY OF THE EFFECT OF PLANTING SCHEMES AND GROWTH REGULATORS ON ICE SALAD PRODUCTIVITY." INTERNATIONAL AGRICULTURAL JOURNAL 9, no. 4 (2026): 126-142. https://doi.org/10.55186/25880209_2026_10_4_39. EDN: CMKGED.

WIKI

{{cite journal | author = Sokolov A. A., Travkina A. R. | title = STUDY OF THE EFFECT OF PLANTING SCHEMES AND GROWTH REGULATORS ON ICE SALAD PRODUCTIVITY | journal = INTERNATIONAL AGRICULTURAL JOURNAL | year = 2026 | volume = 9 | issue = 4 | pages = 126-142 | doi = 10.55186/25880209_2026_10_4_39 }} EDN: CMKGED

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