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- Title
Combined fertilization with nitrogen-potassium to mitigate salt stress in okra.
- Authors
Barros Sales, Giuliana Naiara; de Sousa Silva Neta, Alzira Maria; Bezerra da Costa, Franciscleudo; Soares de Lima, Geovani; Souto Ribeiro, Wellington; Iarley da Silva, Toshik; de Medeiros Lima, Brencarla; Esfrain Pereira, Walter
- Abstract
Okra (Abelmoschus esculentus) is sensitive to the salinity of water and soil, a common abiotic stress in the semiarid region of northeastern Brazil; however, such sensitivity is variable with water management in the soil-plantatmosphere system. Thus, the objective was to evaluate the fertilization with nitrogen-potassium combinations in okra cultivated under salt stress. Photosynthetic pigments, gas exchange, growth and fruit quality were evaluated. Fertilization with N1:K1 (40% N + 40% K2O) reduced the damage caused by salt stress and increased the chlorophyll contents, while the application of N4:K4 (130% N + 100% K2O) decreased the damage caused by salt stress and increased the carotenoid contents. The combination of N:K fertilization did not affect gas exchange, however, salt stress decreased these variables. Fertilization with N2:K2 (70% N + 60% K2O) reduced the damage caused by salt stress and increased the leaf area of okra. In addition, salt stress decreased the number of fruits and increased the fresh mass of okra fruits. The N:K fertilization also reduced the damage caused by salt stress and in the soluble solids content, titratable acidity, SS/TA ratio, and ascorbic acid content. Thus, N:K fertilization can be seen as an important agronomic strategy to improve the performance of okra quality subjected to saline conditions.
- Subjects
K2 (Pakistan : Mountain); BRAZIL; OKRA; PHOTOSYNTHETIC pigments; SALT; SOLUBLE salts; PHOSPHATE fertilizers; ARID regions; FRUIT quality; VITAMIN C
- Publication
Comunicata Scientiae, 2023, Vol 14, p1
- ISSN
2176-9079
- Publication type
Article
- DOI
10.14295/CS.v14.4016