Bell pepper production under saline stress and fertigation with different K+/Ca2+ ratios in a protected environment

Bell peppers are sensitive to salinity; therefore, it is necessary to find alternatives to reduce saline stress. An experiment was conducted in a greenhouse at Federal Rural University of the Semi-Arid Region, in Mossoró, Rio Grande do Norte State, Brazil, to evaluate the effects of salinity and K+/...

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Bibliographic Details
Published in:Acta scientiarum. Agronomy 2020-01, Vol.42, p.e42498-e42498
Main Authors: Silva, Ricardo Carlos Pereira da, Oliveira, Francisco de Assis de, Oliveira, Ademar Pereira de, Medeiros, José Francismar de, Alves, Rita de Cássia, Paiva, Francisco Italo Gomes
Format: Article
Language:eng ; por
Subjects:
AGRONOMY
Arid regions
Arid zones
Calcium
Calcium ions
capsicum annuum l.
salinity
potassium
calcium
soilless culture
Crop production
Design of experiments
Experimental design
Fertigation
Fruits
Nutrient enrichment
Nutrients
Peppers
Potassium
Salinity
Salinity effects
Salinity tolerance
Semi arid areas
Semiarid lands
Sodium chloride
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Summary:Bell peppers are sensitive to salinity; therefore, it is necessary to find alternatives to reduce saline stress. An experiment was conducted in a greenhouse at Federal Rural University of the Semi-Arid Region, in Mossoró, Rio Grande do Norte State, Brazil, to evaluate the effects of salinity and K+/Ca2+ ratios on bell pepper production. The experimental design consisted of randomized blocks in a 5 x 4 factorial scheme with four replicates, corresponding to five K+/Ca2+ ratios (F1 = 3.3/1, F2 = 2.8/1, F3 = 2.2/1, F4 = 1.8/1, and F5 = 1.5/1) and four salinity levels in the nutrient solution using NaCl (1.75, 3.25, 4.75, and 6.25 dS m-1). The following parameters were evaluated: the number of fruits (total, marketable and unmarketable), the mean weight of fruits (marketable and unmarketable), fruit production (total, marketable and percentage of marketable fruits) and a salinity tolerance index. Generally, nutrient solution enrichment with K+ or Ca2+ did not cause significant increments in bell pepper yield. The fertigation treatments F2, F3, and F5 led to a higher bell pepper tolerance to salinity, allowing waters with higher salt concentrations to be used without causing a reduction in the yield.
ISSN:1679-9275
1807-8621
1807-8621
DOI:10.4025/actasciagron.v42i1.42498