Salt and nutritional stress on the physiological characteristics and productivity of the peanut crop
DOI:
https://doi.org/10.5433/1679-0359.2026v47n1p213Keywords:
Arachis hypogaea L. Potassium, Biosaline agriculture.Abstract
Peanut production has been highlighted in the Northeast region of Brazil; however, salinity in irrigation water negatively affects the agronomic performance of crops. Potassium fertilization, in turn, may mitigate salt stress and enhance the agronomic performance of peanut plants. Therefore, this study aimed to evaluate the effect of potassium fertilization as a strategy to mitigate salt stress on peanut agronomic performance. The experiment was conducted in the experimental area of the Auroras Seedling Production Unit, belonging to the Universidade da Integração Internacional da Lusofonia Afro-Brasileira, in Redenção, state of Ceará. A completely randomized design in a 5 × 2 factorial arrangement, with five replications, was adopted. The first factor consisted of five potassium rates (0, 12.5, 25, 37.5, and 50 kg ha⁻1, corresponding to 0, 25, 50, 75, and 100% of the recommended rate), and the second factor consisted of two irrigation water salinity levels (0.8 and 4.0 dS m⁻1). Potassium fertilization, combined with irrigation using moderately saline water, led to increases in pod diameter, pod length, and pod number in peanut plants. However, higher salinity significantly reduced these variables. On the other hand, when applied in isolation, brackish water negatively affected pod weight, yield, and water use efficiency.
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Copyright (c) 2026 Marcio Colombo Viriato Domingos, Geocleber Gomes de Sousa, Francisco Barroso da Silva Junior, Jonnathan Richeds da Silva Sales, José Thomas Machado de Sousa, Andreza de Melo Mendonça, Geovana Ferreira Goes, Fernando Bezerra Lopes, Fred Denilson Barbosa da Silva, Carlos Newdmar Vieira Fernandes
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