Pyroligneous solution as a salt stress attenuator in BRS 323 sunflower

Ferreira, Adriana dos S.; Mendonça, Vander; Ribeiro, João E. da S.; Freire, Raíres I. da S.; Amorim, Patrycia E. C.; Sá, Francisco V. da S.; Alves, Leonardo de S.

doi:10.1590/1983-21252024v3712302rc

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Scientific Article • Rev. Caatinga 37 • 2024 • https://doi.org/10.1590/1983-21252024v3712302rc copy

Pyroligneous solution as a salt stress attenuator in BRS 323 sunflower

Extrato pirolenhoso como atenuador do estresse salino em girassol BRS 323

Authorship SCIMAGO INSTITUTIONS RANKINGS

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.

Keywords
Irrigation; Helianthus annuus; Plant growth; Chlorophyll indices

SV	Saline	Attenuator	S x A	Residual	CV (%)	Mean
DF	4	1	4	30
PH	525.96^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	4.60^ns	22.89^ns		13.64	33.05
SD	1.70^* * ,	2.20^* * ,	0.20^ns		11.26	5.80
LA	760707.61^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	69190.78^ns	5304.42^ns		40.57	652.22
FCI a	52.13^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	120.33^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	13.93^ns		19.07	16.42
FCI b	21.86^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	36.08^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	3.98^ns		22.91	7.12
FCI t	117.99^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	288.31^ - not significant, significant at p ≤ 0.05 and p ≤ 0.01 by F test, respectively.	24.02^ns		15.92	23.54

SV	Saline	Attenuator	S x A	Residual	CV (%)	Mean
	4	1	4	30
SDM	1.41^**	0.27^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.	0.03^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.		14.78	2.89
RDM	0.40^**	0.04^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.	0.006^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.		12.17	1.11
FBFM	0.93^**	0.17^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.	0.05^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.		17.20	1.21
FBDM	1.00^**	0.04^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.	0.06^ns ns significant at 0.01, significant at 0.05 and not significant by F test, respectively.		24.69	0.73

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[1] * Corresponding author: ferreiraagroo@gmail.com