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 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 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 Calcium and potassium contents in nutrient solution on Phoma leaf spot intensity in coffee seedlings

Revista CERES ◽  
2016 ◽  
Vol 63 (4) ◽  
pp. 486-491 ◽  
Author(s):  
Aricléia de Moraes Catarino ◽  
Edson Ampélio Pozza ◽  
Adélia Aziz Alexandre Pozza ◽  
Leone Stabile dias Santos ◽  
Gabriel Brandão Vasco ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Leaf Spot ◽  
Block Design ◽  
Fungal Diseases ◽  
Growth Chamber ◽  
Spot Intensity ◽  
Controlled Conditions ◽  
Progress Curve ◽  
Randomized Block Design ◽  
Nutrient Solutions

ABSTRACT Coffee is one of the main export commodities of Brazilian agribusiness. Phoma leaf spot [Phoma tarda (Stewart) Boerema & Bollen] is one of the most important coffee fungal diseases in Brazil. Therefore, this study aimed to evaluate the intensity of Phoma leaf spot in coffee seedlings supplied with different rates of Ca+2 and K+. The study was conducted under controlled conditions in a growth chamber, at the Department of Phytopathology - UFLA, from February 2010 to December 2011. The assay was repeated twice under the same conditions. The nutrient solutions consisted of five concentrations of K+ (3, 4, 5, 6, 7 mmol L-1) and Ca+2 (2, 4, 6, 8 and 10 mmol L-1). The experiment was arranged in a randomized block design, with 25 treatments and three replicates, with two plants per plot. The areas under incidence progress curve (AUIPC) and severity (AUSPC) were calculated. At the lowest rate of Ca2+ (2 mmol L-1) and highest K+ (6 and 7 mmol L-1), approximately, the AUIPC was the smallest. For the AUSPC, the lowest rates of Ca+2 and K+ resulted in the lowest severities. Supply of Ca+2 and K+ in nutrient solution reduced AUIPC and AUSPC of Phoma leaf spot, and these nutrients can be recommended for the management of the disease.

scholarly journals Productivity of potato seed submitted to different doses of potassium in hydroponic system

2019 ◽  
pp. 555
Author(s):  
Camila B.A. Tufik
Keyword(s):  
Seed Potato ◽  
Block Design ◽  
Maximum Yield ◽  
Dry Mass ◽  
Potato Seed ◽  
Design Data ◽  
Fresh Matter ◽  
Hydroponic System ◽  
Randomized Block Design ◽  
Different Doses

The potato is one of the most economically important crops in Brazil, and among the items that most cost the production is seed potatoes. The deficiency of one nutrient can interfere with the absorption and accumulation of the others in plants. The aim of this work was to quantify the optimal potassium (K) dose for minituber basic seed potato yield in hydroponic system. The experiment was installed in a greenhouse with the Agata cultivar minitubers. The treatments consisted of five doses of K (0.0; 2.5; 5.0; 7.5 e 10.0 mmol L-1) with four repetitions. The experimental design was a randomized block design. Data were submitted to analysis of variance and regression. The number of tubers, fresh mass, classification and dry mass were measured. The content of K and content other nutrients in the seed potato tubers were also evaluated. In the hydroponic systems, the maximum yield per plant was 48.41 tubers obtained with 6.15 mmol L-1 of K and maximum mass of fresh matter was 646.6 g.

scholarly journals Hydroponic cultivation of Oncidium baueri

2017 ◽  
Vol 38 (4Supl1) ◽  
pp. 2823
Author(s):  
Daniele Brandstetter Rodrigues ◽  
Adriane Marinho de Assis ◽  
Ricardo Tadeu Faria ◽  
Marcia Wullf Schuch ◽  
Roberta Marins Nogueira Peil
Keyword(s):  
Nutrient Solution ◽  
Dry Mass ◽  
Vegetable Crops ◽  
Cut Flowers ◽  
Shoot Height ◽  
Cultivation System ◽  
Hydroponic System ◽  
Nutrient Film Technique ◽  
Hydroponic Cultivation ◽  
Bare Root

In Brazil, orchid cultivation has been increasing steadily over the last few years and contributing significantly to the economy. It has been reported that several vegetable crops and ornamentals have been successfully grown by soilless cultivation. The orchid Oncidium baueri Lindl. is grown on pot substrates. Nevertheless, hydroponics is an excellent alternative, especially for the production of cut flowers and bare root plants. The objective of this study was to evaluate the development of Oncidium baueri on two soilless systems: (a) pots containing Amafibra® coconut fiber, carbonized rice husk, and pine bark (1:1:1) irrigated with nutrient solution every 15 d; and (b) a nutrient film technique (NFT) hydroponic system irrigated with nutrient solution daily. Shoot height, pseudobulb diameter, and number of sprouts were evaluated monthly. The number of flowering plants, number of flowers, dry mass of shoots, and dry mass of roots were evaluated 11 months after onset of experiment. The pot cultivation system yielded more flowers and higher values for all vegetative parameters than the NFT hydroponic system.

scholarly journals Environment and slow-release fertilizer in the production of Euterpe precatoria seedlings

2018 ◽  
Vol 48 (4) ◽  
pp. 382-389
Author(s):  
Ueliton Oliveira de Almeida ◽  
Romeu de Carvalho Andrade Neto ◽  
Aureny Maria Pereira Lunz ◽  
Sônia Regina Nogueira ◽  
David Aquino da Costa ◽  
...  
Keyword(s):  
Slow Release ◽  
Block Design ◽  
Dry Mass ◽  
Palm Tree ◽  
Slow Release Fertilizer ◽  
Lack Of Information ◽  
Randomized Block Design ◽  
Number Of Leaves ◽  
Collar Diameter ◽  
Root Collar

ABSTRACT Euterpe precatoria Mart. has been demanded due to the functional characteristics of its fruits and, therefore, its planting has been encouraged. However, there is a lack of information about the seedling production system of this palm tree. Neither a favorable environment nor the amount of fertilizer in the substrate have been defined for the production of healthy and vigorous seedlings. This study aimed to evaluate the effect of environments and doses of a slow-release fertilizer on the production of E. precatoria seedlings. The experiment was conducted in a randomized block design, with three replications and ten plants per plot. The treatments were arranged in a 4 x 5 factorial scheme, with four environments (under shading levels of 20 %, 30 %, 50 % and 75 %) and five doses of a slow-release fertilizer (0.0 kg m-3, 2.5 kg m-3, 5.0 kg m-3, 7.5 kg m-3 and 10.0 kg m-3 of substrate). The seedling height; root collar diameter; number of leaves; leaf, shoot, root and total dry mass; and the Dickson quality index were analyzed. There were significant interactions between the shaded environments and slow-release fertilizer doses for all the analyzed variables. The 75 %-shaded environment yielded better quality seedlings. The slow-release fertilizer can be used to produce E. precatoria seedlings in environments under shading levels of 50 % and 75 %, being the 4.60 kg m-3 and 8 kg m-3 doses, respectively, the most recommended ones.

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 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 Hydroponic cultivation of Oncidium baueri

2017 ◽  
Vol 38 (4Supl1) ◽  
pp. 2823
Author(s):  
Daniele Brandstetter Rodrigues ◽  
Adriane Marinho de Assis ◽  
Ricardo Tadeu Faria ◽  
Marcia Wullf Schuch ◽  
Roberta Marins Nogueira Peil
Keyword(s):  
Nutrient Solution ◽  
Dry Mass ◽  
Vegetable Crops ◽  
Cut Flowers ◽  
Shoot Height ◽  
Cultivation System ◽  
Hydroponic System ◽  
Nutrient Film Technique ◽  
Hydroponic Cultivation ◽  
Bare Root

In Brazil, orchid cultivation has been increasing steadily over the last few years and contributing significantly to the economy. It has been reported that several vegetable crops and ornamentals have been successfully grown by soilless cultivation. The orchid Oncidium baueri Lindl. is grown on pot substrates. Nevertheless, hydroponics is an excellent alternative, especially for the production of cut flowers and bare root plants. The objective of this study was to evaluate the development of Oncidium baueri on two soilless systems: (a) pots containing Amafibra® coconut fiber, carbonized rice husk, and pine bark (1:1:1) irrigated with nutrient solution every 15 d; and (b) a nutrient film technique (NFT) hydroponic system irrigated with nutrient solution daily. Shoot height, pseudobulb diameter, and number of sprouts were evaluated monthly. The number of flowering plants, number of flowers, dry mass of shoots, and dry mass of roots were evaluated 11 months after onset of experiment. The pot cultivation system yielded more flowers and higher values for all vegetative parameters than the NFT hydroponic system.

scholarly journals Nutrient contents and production of rocket as affected by nitrogen concentrations in the nutritive solution

2008 ◽  
Vol 65 (6) ◽  
pp. 652-658 ◽  
Author(s):  
Rodrigo Luiz Cavarianni ◽  
Arthur Bernardes Cecílio Filho ◽  
Jairo Osvaldo Cazetta ◽  
André May ◽  
Mariana Marotti Corradi
Keyword(s):  
Nutrient Solution ◽  
Block Design ◽  
Nitrate Content ◽  
Nutrient Contents ◽  
Randomized Block Design ◽  
Nitrogen Concentrations ◽  
Number Of Leaves ◽  
Hydroponic Conditions ◽  
Nutrient Solutions

Empiricism in the use of nutrient solutions is frequent. Several times the same nutrient solution is used to grow different species based only on morphological similarities. This practice may lead to nutritional imbalances, affecting not only the production but also the quality of the product due to an accumulation of nitrate. An experiment under hydroponic conditions - the NFT system - was conducted with the aim of evaluating the effect of the concentration of nitrogen in the nutrient solution on the production and on the nutrient and nitrate contents of rocket (Eruca sativa) salad leaves. The experiment was carried out in spring 2003, in a randomized block design and in a 4 x 3 factorial design, with four replicates. Four nitrogen concentrations in the nutrient solution (60.8; 121.6; 182.5; 243.5 mg L-1) and three rocket salad cultivars (Cultivada, Folha Larga and Selvática) were evaluated. Cv. Cultivada produced the tallest plants and the highest leaf fresh fitomass, not differing from cv. 'Folha Larga' in the number of leaves, leaf nitrate content, root dry fitomass and root fresh fitomass. An increment in NO3, N, Ca and P and a reduction in Mg, K and S occurred when the concentration of N in the nutrient solution was increased. Cultivation of cv. Cultivada at the concentration of 93 mg L-1 is the most recommended as it provides the highest yield and low nitrate content.

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