Pyroligneous solution as a salt stress attenuator in BRS 323 sunflower

Adriana dos Santos Ferreira; Vander  Mendonça; João Everthon da Silva  Ribeiro; Raíres Irlenizia da Silva  Freire; Patrycia Elen Costa  Amorim; Francisco Vanies da Silva  Sá; Leonardo de Sousa    Alves

doi:10.1590/1983-21252024v3712302rc

Authors

Adriana dos Santos Ferreira Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0001-5379-0243
Vander Mendonça Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0001-5682-5341
João Everthon da Silva Ribeiro Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0002-1937-0066
Raíres Irlenizia da Silva Freire Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0002-4209-1305
Patrycia Elen Costa Amorim Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0000-0002-8172-083X
Francisco Vanies da Silva Sá Department of Agrarian and Exact, Universidade Estadual da Paraíba, Catolé do Rocha, PB, Brazil https://orcid.org/0000-0001-6585-8161
Leonardo de Sousa Alves Department of Agronomic and Forest Sciences, Universidade Federal Rural do Semi-Árido, Mossoró, RN, Brazil https://orcid.org/0009-0008-1946-1831

DOI:

https://doi.org/10.1590/1983-21252024v3712302rc

Keywords:

Helianthus annuus. Plant growth. Chlorophyll indices.

Abstract

Proper salinity concentration can positively impact the growth of sunflower plants. From this perspective, this study aimed to evaluate the sunflower BRS 323 with regard to the effects of salinity and the use of pyroligneous solution as a salt stress mitigator. The experiment was conducted in a plant nursery. The experimental design was completely randomized, in 5 x 2 factorial arrangement with four replications, with one plant per plot. The treatments corresponded to five electrical conductivity levels of irrigation water: 0.75 dS m^-1 (control); 1.65; 1.95; 2.65 and 2.85 dS m^-1, obtained by dissolving sodium chloride, and two conditions of pyroligneous solution application , with and without. Weekly, the plants were evaluated for growth in height, diameter, and leaf area. Also, the values of the indices of chlorophyll a, chlorophyll b, total chlorophyll, shoot and root fresh and dry mass, and flower bud fresh and dry mass were evaluated 50 days after sowing, corresponding to the end of the experimental phase. The results suggest that the pyroligneous solution, at the concentration tested, can be recommended to increase the levels of chlorophyll a, chlorophyll b and total chlorophyll. Moderate salt stress of 1.65 dS m^-1 promoted an increase in the growth parameters of sunflower plants.

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