Design and Implementation of a Knowledge-Based Nutrient Solution Irrigation System for Hydroponic Applications

2018 ◽  
Vol 61 (2) ◽  
pp. 369-379
Author(s):  
Chung-Liang Chang ◽  
Guo-Fong Hong ◽  
Wei-Lun Fu
Keyword(s):  
Nutrient Solution ◽  
Plant Pathogens ◽  
Irrigation System ◽  
Fuzzy Rule ◽  
Labor Cost ◽  
Graphic User Interface ◽  
Micro Electro Mechanical Systems ◽  
Cultivation System ◽  
Knowledge Based ◽  
Hydroponic Cultivation

Abstract. Hydroponics can allow crops to grow faster and can reduce plant pathogens. However, hydroponic systems have several disadvantages, of which the two most important are: (1) improper management or dramatic changes in the electrical conductivity (EC) and pH of the nutrient solution can harm the plant roots and affect the plant growth, and (2) system operators need to monitor the nutrient solution and replenish it regularly, thereby increasing the labor cost. Therefore, this study developed a micro-electro-mechanical systems (MEMs) based mixing system for hydroponic nutrient solutions based on fuzzy rule-based inference, which uses a micro-controller as the core and controls the output of five nutrient solution tanks to the mixing tank. The proposed system maintained an appropriate range of pH and EC in the mixing tank. Operators can view the changes in pH, EC, dissolved oxygen (DO), and other values in the nutrient solution on a graphic user interface. Moreover, operators can manually or automatically mix the nutrient solution. The system has been implemented in a hydroponic cultivation system, and the analysis results are discussed in this article. Keywords: Fuzzy logic, Hydroponics, Microcomputer.

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 Growth, Productivity, and Mineral Composition of Hydroponically Cultivated Greenhouse Tomatoes, with or without Nutrient Solution Recycling

1996 ◽  
Vol 121 (6) ◽  
pp. 1082-1088 ◽  
Author(s):  
H. Zekki ◽  
L. Gauthier ◽  
A. Gosselin
Keyword(s):  
Mineral Composition ◽  
Nutrient Solution ◽  
Dry Weight ◽  
Growth And Yield ◽  
Cultivation System ◽  
Nutrient Film Technique ◽  
Hydroponic Cultivation ◽  
Horticultural Practice ◽  
Environmentally Sound ◽  
Greenhouse Tomatoes

Tomato plants (Lycopersicon esculentum Mill. cv. Capello) were grown in the three most promising and used hydroponic cultivation systems using rockwool and peatmoss substrates and nutrient film technique (NFT), either with or without recovery and recycling of the drainage solutions. Prolonged recycling of nutrient solutions in NFT caused a reduction in fresh weight, dry weight, and yield compared to plants grown in NFT with regular renewal of the nutrient solution. There were no differences in growth, productivity, and leaf mineral composition between plants grown in rockwool and peatmoss systems, with or without recycling, and in the NFT system without recycling. These results suggest that recycling drainage solutions is an economically and environmentally sound horticultural practice that when used correctly does not cause a reduction in yield of tomatoes cultivated in rockwool or peatmoss. However, prolonged use of the same solution in the NFT cultivation system can negatively affect growth and yield. This is most likely due to an accumulation of sulfate ions in the fertigation solutions.

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.

Irrigation of Geraniums with an Automatic Controlled Water Table System

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 522d-522 ◽  
Author(s):  
J.W. Buxton ◽  
D.L. Ingram ◽  
Wenwei Jia
Keyword(s):  
Water Potential ◽  
Leaf Area ◽  
Water Table ◽  
Nutrient Solution ◽  
Irrigation System ◽  
Central Area ◽  
Dry Weight ◽  
Trickle Irrigation ◽  
Run Off ◽  
Optimum Water

Geraniums in 15-cm pots were irrigated automatically for 8 weeks with a Controlled Water Table (CWT) irrigation system. Plants were irrigated with a nutrient solution supplied by a capillary mat with one end of the mat suspended in a trough below the bottom of the pot. The nutrient solution remained at a constant level in the trough. Nutrient solution removed from the trough was immediately replaced from a larger reservoir. The vertical distance from the surface of the nutrient solution and the bottom of the pot determined the water/air ratio and water potential in the growing media. Treatments consisted of placing pots at 0, 2, 4, and 6 cm above the nutrient solution. Control plants were irrigated as needed with a trickle irrigation system. Geraniums grown at 0,2 and 4 CWT were ≈25% larger than the control plants and those grown at 6 CWT as measured by dry weight and leaf area. Roots of plants grown at 0 CWT were concentrated in the central area of the root ball; whereas roots of plants in other treatments were located more near the bottom of the pot. Advantages of the CWT system include: Plant controlled automatic irrigation; no run off; optimum water/air ratio.

scholarly journals Effects of Node Position and Electric Conductivity of Nutrient Solution on Adventitious Rooting of Nasturtium (Tropaeolum majus L.) Cuttings

Agronomy ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 363
Author(s):  
Wenshuo Xu ◽  
Na Lu ◽  
Masao Kikuchi ◽  
Michiko Takagaki
Keyword(s):  
Electric Conductivity ◽  
Nutrient Solution ◽  
Adventitious Rooting ◽  
Cutting Propagation ◽  
Apical Bud ◽  
Hydroponic Cultivation ◽  
Bud Position ◽  
Seed Propagation ◽  
Node Position

Nasturtium is a popular herbal plant, widely cultivated as culinary and medicinal plants all over the world. However, the seed propagation of nasturtium is inefficient, and in-vitro propagation is sophisticated and high-cost. In this study, the cutting propagation method was employed to produce nasturtium seedlings. We aimed to determine the optimal conditions for cutting propagation of nasturtium seedlings by investigating the effects of node position and electric conductivity (EC) of nutrient solution on the root formation of the cuttings. Cuttings from five node positions (apical bud, 2nd node, 3rd node, 4th node, and 5th node) were subjected to water and five EC (1.0, 2.0, 3.0, 4.0, and 5.0 dS m−1) treatments with a hydroponic cultivation system in a plant factory. Results showed that all cuttings rooted successfully within two weeks. The cuttings from the apical bud position rooted earliest and produced the most roots regardless of EC level. Cuttings from other node positions produced longer roots and heavier root fresh and dry weights than those from the apical bud position. The cuttings under EC of 1.0 dS m−1 had the greatest root number, the longest root length, and the heaviest root fresh and dry weights regardless of node positions. The EC of 1.0 dS m−1 is considered the best condition for nasturtium cuttings for the range of EC tested in this study, and the cuttings from all the five node positions can be used as seedling materials.

scholarly journals SEMI-HYDROPONIC CULTIVATION AS A SELECTION TOOL FOR ALUMINUM TOLERANCE IN FORAGE GRASSES

2016 ◽  
Vol 24 (4) ◽  
pp. 350-356
Author(s):  
Gustavo André Colombo ◽  
Aurélio Vaz-de-Melo ◽  
Gilberto Coutinho Machado Filho ◽  
André Silva de Sousa
Keyword(s):  
Nutrient Solution ◽  
Aluminum Toxicity ◽  
Aluminum Tolerance ◽  
Dry Weight ◽  
Panicum Maximum ◽  
Forage Grasses ◽  
Breeding Programs ◽  
Brachiaria Humidicola ◽  
Hydroponic Cultivation ◽  
Constant Improvement

The constant improvement of selection methods is necessary in order to optimize efficiency of breeding programs for aluminum tolerance. Thus, the aim of this study was to establish a vase volume to the ideal semi-hydroponic cultivation of forage grasses subjected to stress by aluminum in nutrient solution. The experimental design completely randomized, with four replicates, each replicate consisting of one plant per vase. The treatments were arranged in a factorial design 4x5, being the first factor consists of four genotypes of forage grasses Brachiaria Humidicola; Brachiaria brizantha cv. Piatã; Panicum maximum cv. Massai and Panicum maximum cv. Mombaça) and the second consisting of five separate volumes plastics vases where seedlings were grown (0.2; 0.25; 0.3; 0.35 and 0.4 dm³). The grasses grown in a semi-hydroponics system irrigated with nutrient solution rich in aluminum (3 mg L-1). Was measured plant height, dry weight of aereal part and root length. The semi-hydroponic cultivation in aluminum increased nutrient solution is effective in differentiation of forage grasses genotypes in relation to aluminum tolerance. Pots volumes near 0.3 dm3 promote greater development for root and aerial part attributes in forage grasses grown in nutrient solution with aluminum toxicity.

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.

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