Cauliflower Growth and Yield in a Hydroponic System With Brackish Water

Costa, Leandro Ferreira Da; Soares, Tales Miler; Silva, Mairton Gomes da; Modesto, Francisco José Nunes; Queiroz, Laila De Andrade; Pereira, Juliana de Souza

doi:10.1590/1983-21252020v33n421rc

Cited by 11 publications

(4 citation statements)

References 30 publications

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“…Hydroponic cultivation is an important alternative in the production of vegetables, due to the possibility of having greater control over production factors, especially the management of water and nutrients, besides making it possible to produce throughout the year in a greenhouse, hence being an advantageous cultivation practice for the Northeastern semi-arid conditions (LOUREIRO et al, 2019). Moreover, in the hydroponic cultivation (soilless), only the osmotic potential of the solution is considered, disregarding the matric potential that is observed in conventional cultivation in soil, so this system becomes appropriate to reduce the socioeconomic impacts caused by water scarcity in semi-arid regions (COSTA et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

et al. 2022

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Knowledge about the effect of chemical conditioners on the reduction of the deleterious effects caused by salinity on crops is of great importance for the expansion of the cultivation of vegetable crops such as zucchini in the semi-arid region of the Northeast. In this context, the objective of the present study was to evaluate the effect of the foliar application of hydrogen peroxide as a mitigator of salt stress on the gas exchange, production, and postharvest fruit quality of zucchini cultivated in a hydroponic system. The study was conducted in NFT-type (Nutrient Film Technique) hydroponic system in a greenhouse, in Pombal — PB, Brazil. The experimental design was completely randomized, in a 4 × 4 factorial scheme, corresponding to four levels of electrical conductivity of the nutrient solution - ECns (2.1 (control); 3.6; 5.1 and 6.6 dS m−1), and four concentrations of hydrogen peroxide - H2O2 (0; 20; 40 and 60 μM), with three replicates. Nutrient solution with electrical conductivity above 2.1 dS m−1 caused a reduction in gas exchange and the total number of fruits of zucchini. An increase in nutrient solution salinity levels increased the total soluble solids content of the fruits and the initial fluorescence of zucchini. Under conditions of nutrient solution salinity above 2.1 dS m−1, hydrogen peroxide could not mitigate the effects of salt stress. Application of 20 μM of H2O2 when the plants were grown in a nutrient solution of 2.1 dS m−1 promoted higher total fruit weight and basal diameter of the fruits.

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Section: Introductionmentioning

confidence: 99%

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

et al. 2022

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“…Salt stress reduces the activity of ions in solution and alters the processes of absorption, transport, assimilation, and distribution of nutrients in the plant, consequently leading to low yield [65]. Reductions in production components due to salt stress in hydroponic cultivation have also been observed in other studies with okra [66], cauliflower [67], 'biquinho' pepper [34], and zucchini [68].…”

Section: Discussionmentioning

confidence: 63%

Salicylic Acid Modulates Okra Tolerance to Salt Stress in Hydroponic System

et al. 2022

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Salinity is one of the most devastating abiotic stresses that limit plant growth and yield, especially in arid and semi-arid regions. The objective of this study was to evaluate the effect of foliar application of salicylic acid in mitigating the effects of salt stress on okra cultivation in a hydroponic system. The study was conducted in a greenhouse, consisting of two experiments. A completely randomized design was adopted in a split-plot scheme, with four levels of electrical conductivity of the nutrient solution—EC (2.1; 3.6; 5.1, and 6.6 dS m−1) considered the plots and four salicylic acid concentrations—SA (0, 1.2; 2.4, and 3.6 mM), the subplots, with four replications. The second experiment differed from the first only by the increase in the EC levels (3.0, 5.0, 7.0, and 9.0 dS m−1). An increase in the electrical conductivity of the nutrient solution negatively affected the physiology and production components of okra. However, foliar application of salicylic acid at concentrations between 1.2 and 2.3 mM reduced the harmful effects of salt stress. The salinity threshold for hydroponic cultivation of okra was 2.54 dS m−1, with a reduction of 7.98% per unit increment in EC above this level.

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“…Although the EC of microalgae and cattle manure was slightly higher, their application did not significantly affect the final soil EC from 2.00 to 2.00-2.01 dS m -1 . Considering that cauliflower is moderately tolerant to salinity, with an EC threshold ranging from 1.52-3.20 dS m -1 , these results suggest that the EC of organic amendments did not significantly affect cauliflower plant development (Da Costa et al, 2020). This statement is reinforced by the fact that the traditional mixed fertilizer (T1) had nonsignificant differences with T5 and T6 in terms of EC (Table 6; p > 0.05).…”

Section: Discussionmentioning

confidence: 78%

Effects of microalgae and compost on the yield of cauliflower grown in low nutrient soil

Díaz-Pérez¹,

Díaz²,

Valdés³

et al. 2023

Chil. j. agric. res.

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The application of organic amendments is an increasingly widespread practice, which allows fertilizing and restoring soils in a sustainable and environmentally friendly way. Improving the quality of amendments through the application of microorganisms has been a challenge in recent years. The objective of the study was to determine the effects of microalgae+compost (1:1) mixture on the yield of cauliflower (Brassica oleracea L. var. botrytis L.) plants grown in a sandy loam soil with low nutrient availability. Yields were compared with the application of compost, cattle manure and two chemical fertilizers. The treatments applied were: T1 prepared with urea (NPK 46-0-0), triple superphosphate (NPK 0-46-0) and potassium saltpeter (NPK 15-0-14); T2 commercial fertilizer (NPK 12-11-18); T3 microalgae biomass (T3); T4 compost; T5 1:1 microalgae+compost mixture; T6 cattle manure; and T0 control (no fertilization). The experiments were conducted in 30 L pots using 40 g soil per plant and 4 g N as a reference to standardize fertilizer application. The results showed that the fresh weight (FW) and dry weight (%DW) of T5 and T6 were not significantly different from those of T1 (p > 0.05), on the contrary, FW of T5 and T6 was 43.8% and 40% higher than in T2, as well as the %DW was 0.59% and 0.6% w w -1 , also higher than in T2. These results suggest that the microalgae+compost mixture is an alternative fertilizer, equivalent to chemical fertilizers and manure, presenting the advantages of being more stable, sustainable, and environmentally friendly. However, further studies are needed to determine the necessary dose per cultivated plant species.

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Cauliflower Growth and Yield in a Hydroponic System With Brackish Water

Cited by 11 publications

References 30 publications

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

Gas Exchange and Hydroponic Production of Zucchini Under Salt Stress and H2o2 Application

Salicylic Acid Modulates Okra Tolerance to Salt Stress in Hydroponic System

Effects of microalgae and compost on the yield of cauliflower grown in low nutrient soil

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