scholarly journals Accumulation of cations in lettuce cultivars under low-cost hydroponic system with brackish waters

2021 ◽  
Vol 25 (12) ◽  
pp. 833-839
Author(s):  
Anna C. R. A. da Silva ◽  
Gerônimo F. da Silva ◽  
Sirleide M. de Menezes ◽  
Ruana Í. F. Cruz ◽  
José A. Santos Júnior ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Nutrient Solution ◽  
Aerial Part ◽  
Dry Matter ◽  
Low Cost ◽  
Block Design ◽  
Green Leaf ◽  
Hydroponic System ◽  
Randomized Block Design ◽  
Electrical Conductivities

ABSTRACT The use of brackish water to cultivate lettuce can cause nutritional imbalances, impairing production. In this context, the objective of the present study was to evaluate the effect of salinity on the accumulation of dry matter of the aerial part and macronutrients K, Ca and Mg and their relations with Na in lettuce cultivars grown in a low-cost hydroponic system. The experiment was conducted in a randomized block design, in a 6 × 2 factorial scheme, with four replicates. The treatments consisted of six electrical conductivities of the nutrient solution (1.5, 2.5, 3.5, 4.5, 5.5 and 6.5 dS m-1) and two lettuce cultivars, Betty [iceberg] and Mimosa [green-leaf]. Regardless of the evaluated cultivar, the increase in the electrical conductivity of the nutrient solution reduced the accumulation of dry matter in the aerial part. In both cultivars, the increase in the electrical conductivity of the nutrient solution reduced the accumulations of K and Mg and increased Na/K, Na/Ca and Na/Mg ratios. The green-leaf cv. Mimosa showed Ca and Mg accumulations higher than that in the iceberg cv. Betty, regardless of electrical conductivity. The increase in electrical conductivity reduced the accumulation of K, in both cultivars evaluated. The decreasing order in the accumulation of macronutrients and sodium in both cultivars was: K > Na > Ca > Mg.

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 THE RESPONS ON GROWTH AND YIELD OF OKRA (Abelmoschus Esculentus (L.) Moench) PLANTS USING SUBSTRATE HYDROPONIC SYSTEM IN VARIOUS EC VALUE OF NUTRITION SOLUTIONS AND TYPES OF PLANTING MEDIA

Agrivet ◽  
2018 ◽  
Vol 24 (2) ◽  
Author(s):  
Yogi Adiyasa Febriantara ◽  
Ellen Rosyelina Sasmita ◽  
Endah Budi Irawati
Keyword(s):  
Nutrient Solution ◽  
Block Design ◽  
Fruit Weight ◽  
Growth And Yield ◽  
Hydroponic System ◽  
Randomized Block Design ◽  
Two Factors ◽  
Main Plot ◽  
The Right ◽  
Very High

Okra (Abelmoschus esculantus) L. Moench), is an important vegetable that grows in the tropical and sub-tropical parts of the world. Okra plants contain very high nutritional value (at 100 g of young okra fruit containing 35 g of calories, 89.6 g of water, 6.4 g of carbohydrates, 1.9 g of protein, 0.4 g of fat, 1.2 g of fiber, 0 , 7 g of minerals). In Indonesia, okra plants have not been widely cultivated and the cultivation method has not used the right technology, so it is necessary to examine the proper cultivation methods of Okra. This study aims to determine the EC value of the most optimal nutrient solution and the effect of the type of planting media that is best on the growth and yield of okra plants. The research was carried out in plastic houses located in Pondok, Karangbendo, Banguntapan, Bantul, Yogyakarta in May to August 2018. Experiments using polybag with a Complete Randomized Block Design (RAKL) Split Plot two factors were repeated 3 times. The first factor as the main plot is the EC value of nutrient solution (C1: EC value 1.5 mS / cm, C2: EC value 2 mS / cm, C3: EC value 2.5 mS / cm) and the second factor as sub plot is type planting media (M1: Husk charcoal, M2: Sand Malang, M3: Husk charcoal + Cocopeat (1:1). The results showed that there was no interaction between the treatment of giving various EC values of nutrient solution and type of planting media. The treatment of various EC values of nutrient solution and type of planting media significantly affected the parameters of plant height growth, leaf area, root volume, flowering age, stem diameter, parameters of total fruit yield per plant, fresh weight per fruit, total fruit weight per plant, fruit weight per Ha. The treatment of giving EC values of 2.0 mS / cm showed suitable results for the growth and yield of okra plants. The treatment of the type of husk charcoal growing media showed suitable results for the growth and yield of okra plants.Keywords: Okra Plant, Substrate Hydroponic, Planting Media, Solution EC Value

scholarly journals Rocket plants in response to nitrogen concentration in nutrient solution

2021 ◽  
Vol 39 (3) ◽  
pp. 341-345
Author(s):  
Paulo Henrique S Silva ◽  
Arthur Bernardes Cecílio Filho ◽  
Isaias dos S Reis ◽  
Carolina S Nascimento ◽  
Camila S Nascimento
Keyword(s):  
Nutrient Solution ◽  
Block Design ◽  
Nitrogen Concentration ◽  
Dry Mass ◽  
Nitrate Content ◽  
Hydroponic System ◽  
N Concentration ◽  
Randomized Block Design ◽  
Number Of Leaves

ABSTRACT Nitrogen (N) is the second most accumulated nutrient in rocket. This nutrient greatly affects growth, productivity and quality of the vegetable. Rocket is the second most widely grown leafy vegetable in hydroponic system; however, no studies on how N concentration in nutrient solution affects this crop can be found in literature. We studied four concentrations (79.2; 118.8; 158.4 and 237.6 mg L-1 of N) in a randomized block design with five replicates. Maximum number of leaves, leaf area, dry mass and productivity of rocket cv. ‘Folha larga’ were obtained with the highest N concentration. The rocket quality, evaluated by the nitrate content, was maximum with 210.2 mg L-1 of N and its value in the concentration which maximized productivity is in the acceptable range for vegetables; so, it is recommended to grow rocket with 237.6 mg L-1 of N in the nutrient solution.

scholarly journals EFFECT OF CONCENTRATION AND N:K RATIO IN NUTRIENT SOLUTION FOR HYDROPONIC PRODUCTION OF CUCUMBER

2017 ◽  
Vol 30 (4) ◽  
pp. 818-824 ◽  
Author(s):  
DEISE SILVA CASTRO PIMENTEL CARDOSO ◽  
MARIA APARECIDA NOGUEIRA SEDIYAMA ◽  
YONARA POLTRONIERI ◽  
MAIRA CHRISTINA MARQUES FONSECA ◽  
YANE FERNANDES NEVES
Keyword(s):  
Nutrient Solution ◽  
Nitrogen Availability ◽  
Block Design ◽  
Dry Mass ◽  
Hydroponic System ◽  
Aerial Parts ◽  
Lack Of Information ◽  
Randomized Block Design ◽  
Hydroponic Cultivation ◽  
Nutrient Solutions

ABSTRACT The N:K ratio influences the balance between vegetative and reproductive stages, because potassium plays important roles in the processes that regulate plant growth when the nitrogen availability is high. However, there is a lack of information on the N:K ratio suitable for cucumber cultivation in an NFT-hydroponic system. The objective of this study is to evaluate the different N:K ratios in fruiting nutrient solutions for cucumber production in a hydroponic system. Treatments consisted of two cucumber hybrids (Natsuno Kagayaki and Runner) and four nutrition solutions with different N:K ratios (w/w) (1:0.5, 1:1.0, 1:2.0, and 1:3.0) in the reproductive phase arranged as split plots in a randomized block design with four replications. On the 33rd day after sowing (DAS), the SPAD index on the fourth expanded leaf from the plant apex, number of broaches, and harvests were evaluated. The aerial parts of the plants were collected on the 54th DAS for evaluation of fresh mass, dry mass, and number of leaves per plant. The results showed that the highest concentration of K in the fruiting nutrient solution does not alter the length of the fruits but increases their diameter yield. The N:K ratios in the 1:2.0 and 1:3.0 (w/w) nutrient solutions provided greater yields in both evaluated hybrids. The hybrid Natsuno Kagayaki, however, showed the highest productivity, and it is recommended for hydroponic cultivation.

scholarly journals Deficiency symptoms and uptake of micronutrients by castor bean grown in nutrient solution

2012 ◽  
Vol 36 (1) ◽  
pp. 233-242 ◽  
Author(s):  
José Lavres Junior ◽  
Cleusa Pereira Cabral ◽  
Mônica Lanzoni Rossi ◽  
Thiago Assis Rodrigues Nogueira ◽  
Neusa de Lima Nogueira ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Castor Bean ◽  
Cell Walls ◽  
Dry Matter ◽  
Block Design ◽  
Cell Ultrastructure ◽  
Fruit Yield ◽  
Deficiency Symptoms ◽  
Randomized Block Design ◽  
Bean Plants

Castor bean is a nutrient-demanding species, but there is still little information on its micronutrient requirements. The objectives of this study were to evaluate the effects of levels of B (2.5, 12.5 and 25.0 µmol L-1), Cu (0.05, 0.25 and 0.50 µmol L-1), Mn (0.2, 1.0 and 2.0 µmol L-1) and Zn (0.2, 1.0 and 2.0 µmol L-1) in a nutrient solution on plant B, Cu, Mn and Zn concentrations and uptake, vegetative growth and fruit yield of castor bean "Iris", grown in greenhouse. The experiment was arranged in a completely randomized block design with three replicates. The first deficiency symptoms were observed for B, followed by Zn, Cu and Mn. The main changes in the cell ultrastructure due to lack of B were thickening of the cell walls and middle lamellae, distorted chloroplasts and tightly stacked thylakoids, besides the absence of starch grains. The Mn, Zn and Cu deficiencies led to disruption of chloroplasts, disintegration of thylakoids and absence of amyloplasts. The concentration and uptake of B, Cu, Mn, and Zn in castor bean plants increased with micronutrient supply in the solution. Fruit yield was drastically reduced by B and Mn deficiencies. On the other hand, the dry matter yield of the shoot and root of castor bean plants was not. In the treatment with full nutrient solution, the leaves accumulated 56 and 48 % of the total B and Mn taken up by the plants, respectively, and the seeds and roots 85 and 61 % of the total Cu and Zn taken up, respectively. This shows the high demand of castor bean Iris for B and Mn for fruit yield.

scholarly journals SOLUÇÕES NUTRITIVAS NO DESENVOLVIMENTO DO CRISÂNTEMO CULTIVADO EM VASO

Irriga ◽  
2009 ◽  
Vol 14 (2) ◽  
pp. 205-219 ◽  
Author(s):  
Márkilla Zunete Beckmann-Cavalcante ◽  
Kathia Fernandes Lopes Pivetta ◽  
Ítalo Herbert Lucena Cavalcante ◽  
Lourival Ferreira Cavalcante ◽  
Paulo Affonso Bellingieri
Keyword(s):  
Leaf Area ◽  
Aerial Part ◽  
Dry Matter ◽  
Block Design ◽  
Stem Diameter ◽  
Dendranthema Grandiflora ◽  
Randomized Block Design ◽  
Physiological Indexes ◽  
Number Of Leaves ◽  
Accelerated Growth

SOLUÇÕES NUTRITIVAS NO DESENVOLVIMENTO DO CRISÂNTEMO CULTIVADO EM VASO  Márkilla Zunete Beckmann-Cavalcante1,2; Kathia Fernandes Lopes Pivetta2; Ítalo Herbert Lucena Cavalcante1; Lourival Ferreira Cavalcante3; Paulo Affonso Bellingieri41 Engenharia Agronômica, Campus Profa. Cinobelina Elvas, Universidade Federal do Piauí, Bom Jesus, PI, [email protected] 2 Departamento de Produção Vegetal, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP.3 Departamento de Solos e Engenharia Rural, Centro de Ciências Agrárias, Universidade Federal da Paraíba, Areia, PB.4 Departamento de Tecnologia, Faculdade de Ciências Agrárias e Veterinárias, Universidade Estadual Paulista, Jaboticabal, SP.  1 RESUMO             Devido às informações sobre a solução nutritiva mais adequada ao cultivo de crisântemo de vaso ainda serem incongruentes, objetivou-se avaliar diferentes soluções nutritivas sobre o desenvolvimento do crisântemo cv. Miramar cultivado em vaso na FCAV-UNESP, Jaboticabal-SP.  O experimento foi conduzido em blocos casualizados com avaliação em parcelas subdivididas no tempo, com os tratamentos correspondentes a quatro diferentes soluções nutritivas compostas de fertilizantes comerciais (S1, S2, S3 e S4) e avaliadas em seis épocas (0, 14, 28, 42, 56  e 70 dias após enraizamento - DAE), com cinco repetições. Foram avaliados a altura de plantas; área foliar; número de folhas; diâmetro de haste; massa seca de parte aérea, raízes e total; número e o diâmetro de inflorescências; e, os índices fisiológicos da análise de crescimento. As soluções nutritivas não interferiram significativamente no diâmetro de haste, número e diâmetro de inflorescências e massa seca de raízes. Entretanto, S3 e S4 promoveram a maior altura de plantas, área foliar, número de folhas, massa seca da parte aérea e total. A partir dos índices fisiológicos, observou-se que as plantas apresentaram um crescimento vegetativo acelerado dos 14 aos 28 DAE, destacando-se as soluções S3 e S4. UNITERMOS: Dendranthema grandiflora Tzvelev., índices fisiológicos, nutrição mineral.  BECKMANN-CAVALCANTE, M. Z.; PIVETTA, K. F. L.; CAVALCANTE, Í. H. L.; CAVALCANTE, L. F.; BELLINGIERI, P. A. NUTRITIVE SOLUTIONS FOR DEVELOPMENT OF POTTED CHRYSANTHEMUM  2 ABSTRACT             Although the information about nutritive solution for potted chrysanthemum is still incongruent, the objective of this work was to evaluate the effect of nutritive solutions in the development ofMiramarchrysanthemum cultivated in pots at FCAV-UNESP, Jaboticabal-SP. The experiment had a randomized block design with split-plot evaluation and treatments corresponding to four nutritive solutions consisting of commercial fertilizers (S1, S2, S3, S4) evaluated at 0, 14, 28, 42, 56 and 70 days after rooting (DAE), with five replications. The plant height, leaf area, number of leaves, stem diameter, total dry matter mass of aerial part and roots; number and diameter of inflorescences, and physiological indexes of growth analysis were evaluated. The nutritive solutions did not interfere significantly in stem diameter, number and diameter of inflorescences and dry matter of roots, although S3 and S4 provided the highest plants, leaf area, number of leaves, total dry matter of aerial part. The physiological indexes showed that plants presented an accelerated growth from 14 to 28 DAE with S4 and S3 solutions and therefore they were considered  the best solutions. KEYWORDS: Dendranthema grandiflora Tzvelev., physiological indexes, mineral nutrition.

scholarly journals Production of Passion fruit in a semi-hydroponic system under protected cultivation

2019 ◽  
Vol 41 (5) ◽  
Author(s):  
Douglas José Marques ◽  
José Andres Carreño Siqueira ◽  
Hudson Carvalho Bianchini ◽  
Vinicius Mendes Alves
Keyword(s):  
Electrical Conductivity ◽  
Gas Exchange ◽  
Nutrient Solution ◽  
Block Design ◽  
Passion Fruit ◽  
Passiflora Edulis ◽  
Hydroponic System ◽  
Nutrient Contents ◽  
Protected Cultivation ◽  
Nutrient Solutions

Abstract The objective of this research was to evaluate the production of passion fruit (Passiflora edulis Sims) cultivars in different nutrient solutions, using commercial Bioplant® substrate in slabs system in protected cultivation. A randomized complete block design in a factorial scheme was used with 2 passion fruit cultivars (Araguari and Yellow Master) x 4 nutrient solutions (solution 1, solution 2, solution 3 and solution 4), each plot consisting of 6 plants with 6 replications. Electrical conductivity evaluations in the slabs drained solution started at 15 days after seedling transplantation and the nutrient contents were quantified at the end of the research. In passion fruit, ether extract, crude fiber and crude protein were evaluated. Fruit number, pulp mass, peel thickness and gas exchange were evaluated. It was concluded that the use of nutrient solution 2 in cultivar Yellow Master, with 2.72 dS m-1 electrical conductivity and the use of nutrient solution 4 in cultivar Araguari, with 2.95 dS m-1 electrical conductivity, yielded the largest number of fruits, pulp mass, fruit mass and gas exchange, in slabs system in the protected cultivation of passion fruit.

scholarly journals Physiology in Talisia esculenta seedlings under irrigation with saline water on substrate with hydrogel

2022 ◽  
Vol 43 (2) ◽  
pp. 751-774
Author(s):  
Francisco Thiago Coelho Bezerra ◽  
◽  
Marlene Alexandrina Ferreira Bezerra ◽  
Raiff Ramos Almeida Nascimento ◽  
Walter Esfrain Pereira ◽  
...  
Keyword(s):  
Electrical Conductivity ◽  
Saline Water ◽  
Block Design ◽  
Seedling Emergence ◽  
Co2 Assimilation ◽  
Irrigation Frequency ◽  
Physiological Variables ◽  
Randomized Block Design ◽  
Net Co2 Assimilation ◽  
Electrical Conductivities

Salinity interferes in the physiology of seedlings from germination and seedling emergence, so it is necessary to adopt measures to mitigate its effects. The objectives of this research were to evaluate irrigation frequency, saline water, polymer, and container volume in the emergence and physiology of Talisia esculenta (A. St.-Hil.) Radlk. The treatments were obtained from the combination of polymer doses (0.0; 0.2; 0.6; 1.0; and 1.2 g dm-3), electrical conductivities of the irrigation water (0.3; 1, 1; 2.7; 4.3; and 5.0 dS m-1), and irrigation frequencies (daily and alternate), plus two additional treatments to assess the volume of the container. A randomized block design was used. Emergence and leaf indices of chlorophyll, fluorescence, and gas exchange were analyzed 100 days after sowing. The increase in electrical conductivity reduced and delayed seedling emergence. Decreasing irrigation frequency reduced the chlorophyll b index, stomatal conductance, transpiration, net CO2 assimilation, and carboxylation efficiency. The magnitude of the effects of electrical conductivity of water and polymer were associated with the frequency of irrigation. However, both salinity and polymer reduced practically all physiological variables. The reduction in container volume also affected the physiology of the seedlings, with more effects when irrigated on alternate days. The T. esculenta seedlings are considered sensitive to salinity, should be irrigated daily with water with less electrical conductivity than 1.0 dS m-1, as well as higher capacity containers used (0.75 vs 1.30 dm3).

scholarly journals Macronutrients accumulation and growth of pineapple cultivars submitted to aluminum stress

2016 ◽  
Vol 20 (11) ◽  
pp. 978-983 ◽  
Author(s):  
Mauro F. C. Mota ◽  
Rodinei F. Pegoraro ◽  
Paulo S. C. Batista ◽  
Valéria de O. Pinto ◽  
Victor M. Maia ◽  
...  
Keyword(s):  
Chlorophyll Content ◽  
Nutrient Solution ◽  
Root Length ◽  
Dry Matter ◽  
Block Design ◽  
Stem Diameter ◽  
Aluminum Stress ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
Plant Components

ABSTRACT The objective was to determine the growth and accumulation of macronutrients of two pineapple cultivars submitted to different concentrations of aluminum (Al). For this, a study was conducted in plastic pots containing 4 L of nutrient solution, in a randomized block design, in a 2 x 5 factorial scheme, corresponding to two pineapple cultivars (‘IAC Fantástico’ and ‘Vitória’) and five Al concentrations (0, 21.6, 43.2, 64.8 and 86.4 mg of Al plant-1), with four replicates. The following variables were evaluated: root length, dry matter of root, stem and leaf, stem diameter, number of leaves, chlorophyll content and accumulation of macronutrients at 60 days after treatment. The cv. ‘Vitória’ showed a linear decrease in chlorophyll content, root dry matter, root length and accumulation of N, P, K, Ca and Mg in most plant components promoted by the increase of Al concentration in the nutrient solution. The cv. ‘IAC Fantástico’ had lower total dry matter, stem dry matter, stem diameter and accumulation of N, Ca and Mg. However, the evaluated characteristics were not influenced by the increase of Al concentration, showing greater tolerance of this cultivar to Al in nutrient solution.

Quality and Yield of basil (Ocimum basilicum L.) essential oil under hydroponic cultivation

2020 ◽  
Vol 13 (9) ◽  
Author(s):  
Luz A. Guerrero-Lagunes ◽  
Lucero del Mar Ruiz-Posadas ◽  
María de las N. Rodríguez-Mendoza ◽  
Marcos Soto-Hernández
Keyword(s):  
Essential Oil ◽  
Leaf Area ◽  
Nutrient Solution ◽  
Aerial Part ◽  
Dry Matter ◽  
Dry Weight ◽  
Ocimum Basilicum ◽  
Hydroponic System ◽  
Hydroponic Cultivation

Objective: to assess the production of basil (Ocimum basilicum L.) grown in a greenhouse under open hydroponic system, using tezontle (volcanic gravel) as substrate. Methodology: three planting densities were evaluated: D1, D2 and D3 (14, 28 and 71 plants m-2, respectively) and two concentrations of Steiner nutrient solution (S1: 100%, and S2: 50%). Results: the highest values for fresh and dry weight of the aerial part, were the treatments S1 D1, S1 D2 and S2 D1. With S1 D1 the largest leaf area was obtained. Dry matter obtained was 14.03 mg g-1 of essential oil. Findings: the use of hydroponics with an increase in sowing density can generate up to 70.21 t ha-1.

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