scholarly journals Nutrient and inorganic solute (Na+ and Cl-) content in green onion plants under hydroponic cultivation using brackish water

2020 ◽  
Vol 44 ◽  
Author(s):  
Carlos Donato da Silva Souza ◽  
Geronimo Ferreira da Silva ◽  
Sirleide Maria de Menezes ◽  
José Edson Florentino de Morais ◽  
José Amilton Santos Júnior ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Brackish Water ◽  
Hydroponic System ◽  
Brackish Waters ◽  
Randomized Design ◽  
Hydroponic Cultivation ◽  
Salinity Levels ◽  
Completely Randomized Design ◽  
Harmful Effects ◽  
Different Levels

ABSTRACT Cultivation using brackish waters can result in nutritional and metabolic imbalances in several plant species, consequently reducing the production of dry matter (DM) and accumulation of toxic ions (Na+ and/or Cl-) in plants. We evaluated the DM production, and nutrient and inorganic solute (Na+ and Cl-) content in green onion plants (cv. Todo Ano Evergreen - Nebuka) under different levels of nutrient solution salinity in combination with circulation frequencies of this solution. Two experiments were conducted in a hydroponic system, using a completely randomized design, in a 6 × 2 factorial scheme, with five replicates: six levels of nutrient solution salinity (1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 dS m-1) and two solution circulation frequencies (twice and thrice a day). In Experiment I, the evapotranspired depth was replaced using brackish water that was used to prepare each of the salinity levels (used exclusively), whereas in Experiment II, brackish water was used only to prepare each of the salinity levels and public water was used (electrical conductivity [ECw] = 0.12 dS m-1) for replacement in all treatments. The increase in the nutrient solution salinity reduced the production of DM and accumulation of nutrients; the reductions were more pronounced when brackish waters were used exclusively (Experiment I). However, the circulation of solutions thrice a day resulted in the harmful effects of the salinity effect. Replacing the evapotranspirated blade with water supply (Experiment II) mitigated the deleterious effects of salinity. Moreover, three circulations of the nutrient solution daily resulted in lower accumulation of inorganic Na+ and Cl- solutes and increased accumulation of nutrients N, P, K+, Ca2+, Mg2+, and S in the culture.

scholarly journals Treated domestic effluent as a source of water and nutrients in the hydroponic cultivation of ornamental sunflower

DYNA ◽  
2020 ◽  
Vol 87 (212) ◽  
pp. 112-119
Author(s):  
Karoline Santos Gonçalves ◽  
Rogério Novaes De Souza ◽  
Hans Raj Gheyi ◽  
Vital Pedro da Silva Paz ◽  
André Dias De Azevedo Neto ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Low Cost ◽  
Great Variability ◽  
Water Control ◽  
Hydroponic System ◽  
Commercial Grade ◽  
Randomized Design ◽  
Hydroponic Cultivation ◽  
Completely Randomized Design ◽  
Domestic Effluent

The use of treated domestic effluent in agriculture is important not only as a source of water but also as a source of nutrients for crops. In this context, the objective of this study was to evaluate its use for the production of ornamental sunflower cv. ‘Anão de Jardim’ in a bench-type low cost hydroponic system, inferring on its technical feasibility and observing the possible impacts on the crop. The experiment was carried out in a greenhouse adopting a completely randomized design with four treatments (T1 - nutrient solution of Furlani 100%, prepared in municipal supply water - control), T2, T3 and T4 - nutrient solution of Furlani, respectively, with 100, 75 and 50% strength, prepared in treated domestic effluent and six replicates, totalizing 24 experimental units, each consisting of 15 plants. All treatments met the nutritional requirements of the plants and presented adequate contents of N, P, K, Ca and Mg in leaf and stem at harvest leading to satisfactory plant growth and produced acceptable commercial grade chapters and stems. The plants under treatment T4 although produced chapters of commercial quality but exhibited great variability in comparison to the other treatments, therefore except this treatment any other treatment can be used for hydroponic production of ornamental sunflower utilizing treated domestic effluents.

scholarly journals Influence of the N/K ratio on the production and quality of cucumber in hydroponic system

Revista CERES ◽  
2011 ◽  
Vol 58 (5) ◽  
pp. 619-624 ◽  
Author(s):  
Adriene Woods Pedrosa ◽  
Herminia Emilia Prieto Martinez ◽  
Edson Marcio Matiello ◽  
Paulo Cezar Rezende Fontes ◽  
Paulo Roberto Gomes Pereira
Keyword(s):  
Nutrient Solution ◽  
Vegetative Growth ◽  
Additional Treatment ◽  
Fresh Weight ◽  
Hydroponic System ◽  
Randomized Design ◽  
Hydroponic Cultivation ◽  
Fruit Setting ◽  
Nutrient Solutions

The objective of this work was to evaluate the quality of fruits and the nutritional status of cucumber CV. Aodai cultivated in nutrient solutions with different N:K ratios. The hydroponic cultivation was initially performed, during the vegetative growth, in nutrient solution with 1:2.0 mmol L-1 N:K, and, later, during fruit setting, in four different nutrient solutions with N:K (w/w) at the ratios 1:1.4, 1:1.7, 1:2.0 and 1:2.5. An additional treatment with a nutrient solution containing the ratio 1:2.2 (w/w) N:K during the vegetative growth and N:K 1:1.4 (w/w) during fruit setting, both with 10% ammonium (NH4+) was included. The treatments were arranged in a randomized design with six replicates. Irrigation was carried out with deionized water until seed germination, and then with nutrient solution until 30 days after germination, when plants were transplanted. Plants in the hydroponic growing beds were irrigated with the solutions for vegetative growth, and, after 21 days, the solutions were replaced by solutions for fruit setting. At 45 and 60 days after transplanting, the fresh weight, length, diameter, volume and firmness of the fruit were evaluated, and, at 45 days after transplanting, the macronutrient concentrations in the leaves were determined. The use of different N:K ratios during fruit setting influenced the cucumber production. The ratio of 1.0:1.7 N: K (w/w), with 10% of N in the form of ammonia, is recommended for the whole cycle.

scholarly journals Efficiency of water use in sunflower grown in hydroponic system under saline stress

2013 ◽  
Vol 33 (4) ◽  
pp. 718-729 ◽  
Author(s):  
José Amilton Santos Júnior ◽  
Hans R. Gheyi ◽  
Doroteu H. G. Filho ◽  
Frederico A. L. Soares ◽  
Nildo da S. Dias
Keyword(s):  
Water Use ◽  
Nutrient Solution ◽  
Agricultural Production ◽  
Plant Density ◽  
Saline Water ◽  
Saline Stress ◽  
Hydroponic System ◽  
Randomized Design ◽  
Plant Densities ◽  
Completely Randomized Design

In order to identify alternatives for the use of saline water in agricultural production, the effects of the use of brackish water in the preparation of the nutrient solution for the cultivation of sunflower (cv. EMBRAPA 122-V2000) were studied in hydroponic system on consumption and efficiency of water use for the production of achenes and biomass. A completely randomized design was used, analyzed in a 5x2 factorial scheme with three replications. The factors studied were five levels of salinity of nutrient solution (1.7 - control; 4.3; 6.0; 9.0; and 11.5dS m-1) and two plant densities - one or two plants per vessel. It was concluded that the water consumption of sunflower is a variable sensitive to the salinity of the nutrient solution, especially after the fourth week of crop, and that the efficiency of water use in the production of achenes and biomass of sunflower is greater when the plant density increases from one to two plants per vessel, even under saline stress.

scholarly journals Influence of different levels of aluminum on the development of citrus rootstock swingle citrumelo (Citrus paradisi mcf. x Poncirus trifoliata raf.) in nutrient solution

2000 ◽  
Vol 43 (1) ◽  
Author(s):  
Carlos Henrique dos Santos ◽  
Hélio Grassi Filho ◽  
João Domingos Rodrigues ◽  
Sheila Zambello de Pinho
Keyword(s):  
Nutrient Solution ◽  
Dry Matter ◽  
Physiological Parameters ◽  
Poncirus Trifoliata ◽  
Citrus Paradisi ◽  
Randomized Design ◽  
Citrus Rootstock ◽  
Completely Randomized Design ◽  
Different Levels ◽  
Swingle Citrumelo

This work aimed at evaluating the influence of different levels of aluminum on the physiological parameters of the citrus rootstock Swingle Citrumelo in hydroponic solution. The experiment was carried out with a completely randomized design with three replications, subdivided in several lots. The levels of aluminum used were: 0, 7.5, 15, 22.5 and 30 mg L-1 in form of AlCl3.6H2O in nutrient solution. Following physiological parameters were evaluated: specific and relative foliar area, relative foliar mass, and the ratio of aerial part dry matter/root system dry matter. The results showed that aluminum did not influence the parameters evaluated except the specific foliar area, which decreased starting at the 7.5 mg L-1 level.

scholarly journals Physiology and production of cherry tomato cultivars in a hydroponic system using brackish water

2021 ◽  
Vol 25 (4) ◽  
pp. 219-227
Author(s):  
Mateus C. Batista ◽  
Ronaldo do Nascimento ◽  
Sebastião de O. Maia Júnior ◽  
Elka C. S. Nascimento ◽  
Carlos V. de C. Bezerra ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Nutrient Solution ◽  
Brackish Water ◽  
Arid Regions ◽  
Cherry Tomato ◽  
Tomato Plants ◽  
Hydroponic System ◽  
Photosynthetic System ◽  
Salinity Levels ◽  
Tomato Cultivars

ABSTRACT Agricultural production has become a challenge in arid and semi-arid regions due to the scarcity of water for irrigation, so brackish water is commonly used. The present study aimed to evaluate the physiological and production responses of cherry tomato cultivars under salinity levels of the nutrient solution in a hydroponic system. The experiment was conducted in a split plot and 5 × 3 factorial scheme with four repetitions. The factors corresponded to different values of electrical conductivity of the nutrient solution (ECns 2.5, 4.0, 5.5, 7.0 and 8.5 dS m-1) and cultivars (Samambaia, Tomate Vermelho and Caroline). The increase in nutrient solution salinity negatively affected the gas exchange, electrolyte leakage and photosynthetic pigments of the cherry tomato cultivars, mainly with the prolongation of stress. The photosynthetic system was efficient up to 4.0 dS m-1, but, above this electrical conductivity in the nutrient solution, there was photoinhibition or photodamage in the cherry tomato plants at 30 days after transplanting. The cherry tomato cultivars Samambaia and Caroline were the most adapted to brackish solutions, while Tomate Vermelho was the most susceptible.

scholarly journals Frequency of recirculation of nutrient solution in hydroponic cultivation of coriander with brackish water

2016 ◽  
Vol 20 (5) ◽  
pp. 447-454 ◽  
Author(s):  
Mairton G. da Silva ◽  
Tales M. Soares ◽  
Hans R. Gheyi ◽  
Itamar de S. Oliveira ◽  
José A. da Silva Filho ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Experimental Design ◽  
Nutrient Solution ◽  
Brackish Water ◽  
Block Design ◽  
Hydroponic System ◽  
Randomized Block Design ◽  
Hydroponic Cultivation ◽  
Production Losses

ABSTRACT The present study used a hydroponic system with leveled channels, in order to evaluate coriander cultivation under different intervals of nutrient solution recirculation and the use of freshwater and brackish water. The experiment was carried out in a randomized block design with five replicates, in a 2 x 4 factorial scheme, from February to March 2014. Two levels of electrical conductivity (EC) of water (0.32 and 4.91 dS m-1) and four frequencies of nutrient solution recirculation (at intervals of 0.25, 2, 4 and 8 h) were evaluated. This experimental design was adopted in the evaluations performed at 10, 15 and 25 days after transplantation (DAT). Additionally, at 21 DAT subplots were established for the evaluation of plant position (initial, intermediate and final) along the hydroponic channels. It is viable to use nutrient solution recirculation every 8 h, without production losses. The use of brackish water (EC = 4.91 dS m-1) may be an alternative for the hydroponic cultivation of coriander, despite the reduction in production, but without any damage on the visual aspect of the product. Plants grown at the initial and intermediate positions along the hydroponic channels showed higher production.

scholarly journals Salinity and flow rates of nutrient solution on cauliflower biometrics in NFT hydroponic system

2020 ◽  
Vol 24 (4) ◽  
pp. 258-265
Author(s):  
Hammady R. e Soares ◽  
Ênio F. de F. e Silva ◽  
Gerônimo F. da Silva ◽  
Adiel F. da S. Cruz ◽  
José A. Santos Júnior ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Brackish Water ◽  
Semiarid Region ◽  
Vegetable Production ◽  
Flow Rates ◽  
Hydroponic System ◽  
Brackish Waters ◽  
Public Supply ◽  
Nutrient Film Technique ◽  
Supply Water

ABSTRACT The use of brackish water in hydroponic crops represents an alternative for vegetable production. In this context, two experiments were conducted to evaluate the effect of using brackish water to prepare the nutrient solution and replace the evapotranspired depth, applied at different flow rates, on cauliflower biometrics in NFT (nutrient film technique) hydroponic system. In both experiments, the experimental design was completely randomized with four repetitions, in a 6 x 2 factorial scheme: six levels of water electrical conductivity (ECw) in interaction with two flow rates of nutrient solution application in the hydroponic channels (1.5 and 2.5 L min-1). In Experiment I, brackish waters with different EC (1.5, 2.5, 3.5, 4.5 and 5.5 dS m-1), obtained by the addition of NaCl in public-supply water (0.2 dS m-1), were used. In Experiment II, the chemical characteristics of brackish waters collected in the semiarid region of Pernambuco were simulated, with EC of 1.67, 3.30, 4.71, 5.88 and 13.84 dS m-1, plus the control (0.2 dS m-1). Increasing salinity reduced cauliflower growth. Flow rate of 1.5 L min-1 promoted the best results of shoot fresh and dry masses, leaf area, number of leaves, plant height and shoot diameter. The best water for cauliflower production was public-supply water and, among the well waters, the best was the calcium sulfate-rich water with EC of 1.67 dS m-1.

scholarly journals Respon Kembang Kol Dataran Rendah Terhadap Kepekatan Nutrisi pada Floating Hydroponic System Termodifikasi

2019 ◽  
Vol 21 (1) ◽  
pp. 11
Author(s):  
Astri Rovi'ati ◽  
Endang Setia Muliawati ◽  
Dwi Harjoko
Keyword(s):  
Nutrient Solution ◽  
Its Region ◽  
Solution Concentration ◽  
Hydroponic System ◽  
Combination Treatments ◽  
Randomized Design ◽  
Hydroponic Cultivation ◽  
The Right ◽  
Selection Of ◽  
Better Than

<p style="text-align: justify;">Cauliflower has a high consumption level but its production is limited to its region in the highlands and the planting season. An effort to increase its production outside the highland in all seasons is using hydroponics on tolerant varieties. Selection of varieties and giving the right amounts of nutrients will optimize the production of lowland cauliflower. This study aims to determine the types of varieties and concentration of nutrient solution suitable for the cultivation of hydroponic cauliflower in the lowlands. This research uses a Completely Randomized Design (CRD) which consists of 2 factors namely varieties and nutrient solution concentration level with 9 combination treatments and each treatment consisted of 4 plants. The results showed that variety of Mona and  PM 126 are better than the Diamond in the hydroponic cultivation of cauliflower in the lowlands. Concentrations of the nutrient solution did not improve growth and show no significant results, so nutrient solution from EC 2.2 to 2.4 mS/cm is better in the hydroponic cultivation of cauliflower in the lowlands.</p>

scholarly journals ROCKET PRODUCTION IN A LOW COST HYDROPONIC SYSTEM USING BRACKISH WATER

2018 ◽  
Vol 31 (4) ◽  
pp. 1008-1016 ◽  
Author(s):  
José Eustáquio Campos Júnior ◽  
José Amilton Santos Júnior ◽  
Juliana Bezerra Martins ◽  
Ênio Farias de França e Silva ◽  
Ceres Duarte Guedes Cabral de Almeida
Keyword(s):  
Nutrient Solution ◽  
Brackish Water ◽  
Low Cost ◽  
Dry Weight ◽  
Shoot Biomass ◽  
Eruca Sativa ◽  
Hydroponic System ◽  
Family Farmers ◽  
Salinity Levels ◽  
Nutrient Solutions

ABSTRACT The production of vegetables in communities of family farmers in semiarid regions is limited due to rudimentary cultivation practices and systems, water scarcity, and excess salts in the water and soil. Thus, the objective of this work was to evaluate the production of rocket (Eruca sativa L. cv. Folha Larga) in a low cost hydroponic system, considering strategies for the use of brackish water in the nutrient solution. The experiments were conducted in complete randomized designs, in 6×2 factorial arrangements, with five replications, using rocket plants grown in different nutrient solutions, consisting of six salinity levels (1.5, 3.0, 4.5, 6.0, 7.5, and 9.0 dS m -1) and two circulation frequencies of the nutrient solution (twice a day, at 8:00h, and 16:00h; and three times a day, at 8:00h, 12:00h, and 16:00h). In Experiment I, the nutrient solution lost by evapotranspiration was replenished with the respective brackish water used in its preparation; and in Experiment II it was replenished with public water (0.12 dS m -1). The shoot and root fresh and dry biomass of the plants and their respective dry weight proportions, and biometric variables were evaluated. Replenishing of the nutrient solution with public water resulted in lower losses in biomass and plant growth. The increases in circulation frequency of the nutrient solution did not affect the biometric variables, however, the plants prioritized shoot biomass development to the detriment of the root when using high circulation frequencies.

scholarly journals Does Fertigation With Fish Farming Effluent Alter the Morphophysiology and Biochemistry of Lippia Gracilis (Verbenaceae)?

2021 ◽  
Author(s):  
José Maria Damasceno Silva Neto ◽  
Marciana Bizerra de Morais ◽  
Nildo da Silva Dias ◽  
Lindomar Maria de Souza ◽  
Mayron Alves Vasconcelos ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Cross Sections ◽  
Glandular Trichomes ◽  
Membrane Damage ◽  
Fish Farming ◽  
Stress Symptoms ◽  
Randomized Design ◽  
Relative Water ◽  
Salinity Levels ◽  
Completely Randomized Design

Abstract In order to evaluate the response mechanisms of L. gracilis fertigated with saline effluent from fish farming, L. gracilis plants were nourished with fish farming effluent with electrical conductivity of 0.45, 2.68, 4.60, 5.55 and 7.02 dS m− 1 for 60 days. The experiment was carried out in the open field using a completely randomized design with five treatments and four replicates. The salinity levels of the nutrient solution containing fish farming effluent did not affect the leaf and stem biomass production, relative water content and leaf area of the studied species. The activity of antioxidant enzymes varied when the nutrient solution salinity level was increased, which also stimulated the breakdown of starch reserves, but did not interfere with the biochemical parameters proline, photosynthetic pigments (chlorophyll a, chlorophyll b and carotenoids), levels of membrane damage and malondialdehyde, indicating that the plant showed no stress symptoms when fertigated with high-salinity effluent. The anatomy of L. gracilis leaf cross-sections shows a unistratified epidermis with glandular and non-glandular trichomes in the adaxial and abaxial sides. Plants that received only fish farming effluent (7.02 dS m− 1) showed a 25% reduction in the number of xylem bundles in the midrib region, compared to the control. The yield, chemical composition and antimicrobial activity of the essential oil extracted from L. gracilis leaves did not differ between treatments. Thus, the saline effluent from fish farming can be used in the fertigation of L. gracilis without compromising plant yield, avoiding environmental contamination with disposal in soil and/or water bodies.

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