Morphophysiology of mini watermelon in hydroponic cultivation using reject brine and substrates

Silva, José S. da; Dias, Nildo da Silva; Neto, Miguel Ferreira; Jales, Gleydson Dantas; Fernandes, Pedro Dantas

doi:10.1590/1807-1929/agriambi.v25n6p402-408

Cited by 14 publications

(9 citation statements)

References 23 publications

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“…Although salt stress caused some damage during the production phase of ‘Sugar Baby’ mini watermelon fruits and seeds, the seeds showed good viability and vigor. Both [ 24 ] and [ 25 ] showed that saline stress decreases ‘Sugar Baby’ mini watermelon growth, fruit production, and post-harvest quality. They showed that salt stress does not affect the mini watermelon photosynthetic rate due to its high photosystem II efficiency.…”

Section: Discussionmentioning

confidence: 99%

Production and Physiological Quality of Seeds of Mini Watermelon Grown in Substrates with a Saline Nutrient Solution Prepared with Reject Brine

Alves

Torres

Paiva

et al. 2022

Plants

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The economically profitable production of crops is related, among other factors, to seed quality, the production system, and the water used in irrigation or preparation of nutrient solutions. Therefore, the objective was to evaluate the phenology, production, and vigor of seeds of mini watermelons grown in saline nutrient solution and different substrates. In the fruit and seed production phase, the experiment occurred in a greenhouse with five electrical conductivities of water for nutrient solution preparation, ECw (0.5, 2.4, 4.0, 5.5, and 6.9 dS m−1), and two growing substrates (coconut fiber and sand). We evaluated the physiological quality of seeds previously produced under the five electrical conductivities of water and two substrates. High salinities for the hydroponic cultivation of the mini watermelon cultivar ‘Sugar Baby’ accelerated fruit maturation and crop cycle, decreasing fruit size. However, in both substrates, the seed production of mini watermelons, seed viability, and seed vigor occurred adequately with a reject brine of 6.9 dS m−1 in the hydroponic nutrient solution. The seed production of ‘Sugar Baby’ mini watermelons using reject brine in a hydroponic system with coconut fiber and sand substrates is viable in regions with water limitations.

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Section: Discussionmentioning

confidence: 99%

Production and Physiological Quality of Seeds of Mini Watermelon Grown in Substrates with a Saline Nutrient Solution Prepared with Reject Brine

Alves

Torres

Paiva

et al. 2022

Plants

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“…The control treatment had the highest water consumption (54.2 L plant -1 ), while the 6.5 dS m -1 treatment had a water consumption of 42.7 L plant -1 . A reduction of water consumption with the increasing of nutrient solution salinity was expected and may be explained by the difficulty in absorbing water by the roots, due to the lower osmotic potential of the solution, with consequences on the development of the shoots and root system (Silva et al 2021).…”

Section: Resultsmentioning

confidence: 99%

Production, water-use efficiency and post-harvest quality of hydroponic mini watermelon under salinity stress1

Cova

Neto

et al. 2021

Pesqui. Agropecu. Trop.

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Irregularity or shortage of rainfall in semi-arid regions forces farmers to use low-quality water to irrigate crops. The present study aimed to assess the water-use efficiency and post-harvest quality of ‘Sugar Baby’ mini watermelon in response to different electrical conductivities of the nutrient solution [2.5 (control), 3.5, 4.5, 5.5 and 6.5 dS m-1], in a floating hydroponic system. The experimental design was completely randomized, with four replicates. The water consumption, production and water-use efficiency were evaluated, as well as qualitative and physico-chemical variables of the fruits. The total water consumption of the plants during the crop cycle varied between 43 (6.5 dS m-1) and 54 (2.5 dS m-1) L plant-1 among the treatments, with water-use efficiency of 0.031 kg L-1. The greatest reductions due to the nutrient solution salinity were observed for the rind thickness and fruit mass (8.80 and 5.69 %, respectively, per unit increase in dS m-1). The salinity of the nutrient solution did not influence the soluble solids content and fruit maturity index, but it had a negative effect on the pH and titratable acidity.

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“…Salinity affects photosynthetic activity due to the accumulation of Na + and/or Clions in chloroplasts, which affect the biochemical and photochemical processes involved in photosynthesis. In addition, salt stress decreases CO 2 uptake because of salt stress, causing the closure of stomata, reducing the photosynthetic process (Silva et al, 2021).…”

Section: Resultsmentioning

confidence: 99%

“…However, the tolerance of plants to salinity can vary according to cultivation system, among other factors. Hydroponic cultivation allows greater tolerance to salinity, because of the energy reorganization resulting from the minimization of the matric potential of system (Soares et al, 2020;Navarro et al, 2022) High concentrations of Na + (sodium) and Cl − (chloride) ions in the cell cytoplasm can inactivate enzymes as well as metabolites, reducing photosynthesis, stomatal conductance, transpiration, and internal carbon concentration, resulting in a decrease in the water-use efficiency (Souza et al, 2020;Silva et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Leaf gas exchanges and production of kale under Ca(NO3)2 concentrations in salinized nutrient solution

Silva

Oliveira

Nascimento

et al. 2023

Rev. bras. eng. agríc. ambient.

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Adequate mineral supplementation can be a strategy to enable the use of brackish water in the production of vegetables. This study intended to evaluate the effect of calcium nitrate concentrations on leaf gas exchanges and yield of kale (Brassica oleracea L) fertigated with salinized nutrient solutions. The experiment was conducted in a randomized block experimental design (4 + 1), with four replicates. Four nutrient solutions prepared in brackish water (6.0 dS m-1) containing four concentrations of Ca(NO3)2 [(750, 1,125, 1,500, and 1,875 mg L-1)] and a control treatment (standard nutrient solution using low-salinity water, 0.5 dS m-1 (750 mg L-1 of Ca(NO3)2) were used in the study. The following analyses were performed: leaf gas exchanges, leaf area, and fresh matter yield. The standard nutrient solution promoted higher values for photosynthetic rate (13.06 µmol CO2 m-2 s-1), stomatal conductance (0.19 mol H2O m-2 s-1), transpiration (2.76 mmol H2O m-2 s-1), instantaneous water use efficiency (4.73 mmol CO2 mol-1 H2O), instantaneous carboxylation efficiency (0.053 mmol CO2 mol-1 CO2), leaf area (2.78 cm2 per plant), and leaf fresh matter yield (2.64 kg per plant). The Ca(NO3)2 not nullified but mitigated the deleterious effect of salt stress on leaf gas exchanges, except for kale yield (leaf fresh matter).

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Morphophysiology of mini watermelon in hydroponic cultivation using reject brine and substrates

Cited by 14 publications

References 23 publications

Production and Physiological Quality of Seeds of Mini Watermelon Grown in Substrates with a Saline Nutrient Solution Prepared with Reject Brine

Production and Physiological Quality of Seeds of Mini Watermelon Grown in Substrates with a Saline Nutrient Solution Prepared with Reject Brine

Production, water-use efficiency and post-harvest quality of hydroponic mini watermelon under salinity stress1

Leaf gas exchanges and production of kale under Ca(NO3)2 concentrations in salinized nutrient solution

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