scholarly journals Tolerance of Eugenia dysenterica to Aluminum: Germination and Plant Growth

Plants ◽  
2019 ◽  
Vol 8 (9) ◽  
pp. 317 ◽  
Author(s):  
Arthur Almeida Rodrigues ◽  
Sebastião Carvalho Vasconcelos Filho ◽  
Caroline Müller ◽  
Douglas Almeida Rodrigues ◽  
Juliana de Fátima Sales ◽  
...  
Keyword(s):  
Plant Cells ◽  
Low Ph ◽  
High Availability ◽  
Hydroponic System ◽  
Anatomical Changes ◽  
Al Content ◽  
Starch Grain ◽  
Growth Chambers ◽  
Hydroponic Systems ◽  
Eugenia Dysenterica

Native Cerrado plants are exposed to soils with low pH and high availability of Al. In this study, we measured the Al content in adult plants, and investigated the effects of various Al doses on germination and early development of Eugenia dysenterica plants. For germination tests, the seeds were soaked in Al solution and evaluated for twenty days in growth chambers. In a second experiment, young plants were cultivated in hydroponic systems with various Al concentrations to evaluate the morphological, anatomical and physiological characteristics of E. dysenterica. Anatomical changes and low germinative vigor were observed in seeds germinated in 600 and 800 μmol Al3+ L−1. In the hydroponic system, 200 μmol Al3+ L−1 stimulated root growth in young plants. The activity of antioxidant enzymes and the accumulation of phenolic compounds were greatest at the highest Al doses, preventing changes in gas exchange and chlorophyll a fluorescence. Starch grain accumulation was noted in plant cells exposed to 200 and 400 μmol Al3+ L−1. Adult E. dysenterica trees also accumulated Al in leaves, bark and seeds. These data suggest that E. dysenterica is tolerant to Al.

scholarly journals Water and fertilizers use efficiency in two hydroponic systems for tomato production

2020 ◽  
Vol 38 (1) ◽  
pp. 47-52 ◽  
Author(s):  
Rodolfo De la Rosa-Rodríguez ◽  
Alfredo Lara-Herrera ◽  
Libia Iris Trejo-Téllez ◽  
Luz Evelia Padilla-Bernal ◽  
Luis Octavio Solis-Sánchez ◽  
...  
Keyword(s):  
Nutrient Solution ◽  
Open System ◽  
Closed System ◽  
Good Alternative ◽  
Fruit Production ◽  
Tomato Production ◽  
Hydroponic System ◽  
Production Water ◽  
Use Efficiency ◽  
Hydroponic Systems

ABSTRACT The amount of water and fertilizers used in the production of vegetables, specifically tomatoes, is high. This study was carried out to determine water and fertilizers use efficiency in closed and open hydroponic systems for tomato production under greenhouse conditions. Two treatments with eight replications were assessed; each replication consisted of 67 pots with two plants each. One treatment was a closed hydroponic system (with nutrient solution recirculation), and the other was an open hydroponic system (with non-recirculating nutrient solution). We quantified the amounts of water and fertilizers applied, as well as the losses (drained nutrient solution), in the two treatments during the entire cycle of tomato. In the nutrient solution (NS) we also measured electric conductivity (EC), pH, volume applied, and volume drained, and total weight of fruits (25 pickings). There were no significant differences between the two treatments on fruit production. Water use efficiency was 59.53 kg/fruit/m3 for the closed system and 46.03 kg/fruit/m3 in the open system. In comparison to the open system, the closed system produced 13.50 kg more fruit per cubic meter of water, while 10.31 grams less fertilizers per kilogram of fruit produced were only applied. Water and fertilizers use efficiency were higher in the closed system, by 22.68% and 22.69%, respectively. More efficiency was obtained in the closed system, regarding the open system. We concluded that the closed system is a good alternative to produce tomato and preserve the resources involved in the process (like water and fertilizers), thus reducing pollution.

Battery Management for Small Hydroponic Systems and Cultivation Experiments

2021 ◽  
Vol 11 (3) ◽  
pp. 21-36
Author(s):  
Satoru Yamaguchi ◽  
Takuya Motosugi ◽  
Yoshihiko Takahashi
Keyword(s):  
Open Circuit Voltage ◽  
Low Cost ◽  
Open Circuit ◽  
State Of Charge ◽  
Battery Management ◽  
Charge Capacity ◽  
Hydroponic System ◽  
Soc Estimation ◽  
Hydroponic Systems ◽  
Electronic Load

A small hydroponic system that can use sustainable energy such as solar power has been developed. However, the amount of power generated is not constant, and in the case of unstable weather, enough power cannot be obtained. Therefore, it is necessary to store the generated energy in a battery. In order to design low-cost charging equipment, it is necessary to use a smaller battery and to estimate the remaining charge capacity (state of charge: SOC) accurately. To provide an accurate SOC estimation for such systems, a fusion of CI (current integral) and OCV (open circuit voltage) methods is proposed. When using this method, it is necessary to frequently disconnect the electronic load. In these experiments, the optimum disconnection duration, the effects on plants of frequent battery disconnection, and cutting off of the lighting were investigated.

scholarly journals Turbulent Kinetic Energy Distribution of Nutrient Solution Flow in NFT Hydroponic Systems Using Computational Fluid Dynamics

2019 ◽  
Vol 1 (2) ◽  
pp. 283-290
Author(s):  
Cesar H. Guzmán-Valdivia ◽  
Jorge Talavera-Otero ◽  
Omar Désiga-Orenday
Keyword(s):  
Fluid Dynamics ◽  
Kinetic Energy ◽  
Energy Distribution ◽  
Turbulent Kinetic Energy ◽  
Nutrient Solution ◽  
Kinetic Energy Distribution ◽  
Solution Flow ◽  
Flow Rates ◽  
Hydroponic System ◽  
Hydroponic Systems

Hydroponics is crucial for providing feasible and economical alternatives when soils are not available for conventional farming. Scholars have raised questions regarding the ideal nutrient solution flow rate to increase the weight and height of hydroponic crops. This paper presents the turbulent kinetic energy distribution of the nutrient solution flow in a nutrient film technique (NFT) hydroponic system using the computational fluid dynamics (CFD) method. Its main objective is to determine the dynamics of nutrient solution flow. To conduct this study, a virtual NFT hydroponic system was modeled. To determine the turbulent kinetic energy distribution in the virtual NFT hydroponic system, we conducted a CFD analysis with different pipe diameters (3.5, 9.5, and 15.5 mm) and flow rates (0.75, 1.5, 3, and 6 L min−1). The simulation results indicate that different pipe diameters and flow rates in NFT hydroponic systems vary the turbulent kinetic energy distribution of nutrient solution flow around plastic mesh pots.

Effects of Aluminum on the Leopard Frog, Rana pipiens: Life Stag Comparisons and Aluminum Uptake

1990 ◽  
Vol 47 (1) ◽  
pp. 210-216 ◽  
Author(s):  
Joseph Freda ◽  
D. Gordon McDonald
Keyword(s):  
Rana Pipiens ◽  
Low Ph ◽  
The Body ◽  
Leopard Frog ◽  
Whole Body ◽  
Toxicity Tests ◽  
Al Content ◽  
Wide Range ◽  
Water Ph ◽  
Percent Mortality

In this study, we conducted a series of toxicity tests investigating the response of embryos, prestage 25 tadpoles and 3-wk old tadpoles of the leopard frog (Rana pipiens) to a wide range pf pH (4.2–4.8) and Al (0–1000 μg∙:L−1}, and to pH 6.5 with no Al present. In embryos and prestage 25 tadpoles, Al ameliorated the toxic effects of very low pH's (4.2–4.4), while becoming toxic at higher pH's (4.6–4.8). Although both embryos and prestage 25 tadpoles were killed by low pH (pH 4.2–4.4 and 4.2, respectively) and elevated Al ([Formula: see text] and [Formula: see text] Al, respectively), embryos were relatively more sensitive (i.e. higher percent mortality) to low pH, whereas prestage 25 tadpoles were relatively more sensitive to Al Three week old tadpoles did not die at any test pH (without Al) and mortality (>20%) caused by Al occurred at only pH 4.8 and 750–1000 μg∙L−1 Al. The body sodium concentrations of 3-wk old tadpoles that survived high Al exposure were depressed indicating sublethal stress. Whole body Al uptake in 3-wk old tadpoles was also elevated in water containing high concentrations of Al, but it was positively related to water pH and exposure time. This result suggests that body Al content is not an accurate indicator of Al exposure in tadpoles living in acidic, Al contaminated ponds.

Microfluidic platforms for plant cells studies

Lab on a Chip ◽  
2014 ◽  
Vol 14 (17) ◽  
pp. 3262-3274 ◽  
Author(s):  
A. Sanati Nezhad
Keyword(s):  
Plant Cell ◽  
Plant Cells ◽  
Cell Analysis ◽  
Microfluidic Platforms ◽  
Growth Chambers ◽  
Conventional Methods

Conventional methods of plant cell analysis rely on growing plant cells in soil pots or agarose plates, followed by screening the plant phenotypes in traditional greenhouses and growth chambers.

scholarly journals Production of pre-basic potato seed by polyvinyl chloride PVC: articulate gutters hydroponic system

2009 ◽  
Vol 52 (5) ◽  
pp. 1107-1114 ◽  
Author(s):  
Jonny Everson Scherwinski-Pereira ◽  
Carlos Alberto Barbosa Medeiros ◽  
Gerson Renan de Luces Fortes ◽  
Arione da Silva Pereira
Keyword(s):  
Crop Yields ◽  
Potato Production ◽  
Potato Seed ◽  
Seed Potato Production ◽  
Hydroponic System ◽  
Hydroponic Systems ◽  
Productive Systems ◽  
Basic Seed

The development of more efficient and productive systems for pre-basic seed potato production would improve the quality of the propagative material used by the potato growers, directly affecting the crop yields. A two-year experiment was carried out to evaluate the potato pre-basic seed production by two types of hydroponic systems (fibrocement tiles and articulated PVC gutters), two cultivars (`Baronesa` and `Eliza`) and two types of propagative material (plants coming from in vitro culture and minitubers). The PVC gutters system was highly efficient. When using minitubers, this system reached multiplication rates up to 74 tubers per plant. Minitubers were more productive than in vitro plants, independent of cultivar and hydroponic system utilized.

scholarly journals Comparative analysis of Aquaponics and Hydroponic systems

2021 ◽  
Vol 5 ◽  
pp. 31-43
Author(s):  
Vilma Petkova ◽  
Kristina Krusteva
Keyword(s):  
Life Cycle ◽  
Comparative Analysis ◽  
Middle Ages ◽  
Chemical Elements ◽  
Arable Land ◽  
Urban Environments ◽  
Controlled Environment ◽  
Food Crops ◽  
Hydroponic System ◽  
Hydroponic Systems

This article presents an analysis of the Aquaponics and Hydroponic systems. The principles of action have been known since the Middle Ages, but in present times they have developed due to an increase in the planet’s population, food and water scarcity, arable land, and environmental pollution. The Hydroponic system is groundless cultivation of food crops, mainly vegetables in a controlled environment. In Aquaponic system the nutrients circulates while combining the life cycle of suitable plants and aquatic fishes. This ensures the functioning of a system that resembles the circles of biogenic chemical elements in nature. Both systems are highly efficient and ecological cleaning, making them particularly suitable for use in urban environments.

scholarly journals Sensory analysis of curly kale produced under conventional and hydroponic systems

2021 ◽  
Vol 24 ◽  
Author(s):  
Lorena Caroline da Silva ◽  
Daniella Martins Pimenta ◽  
Victor Augusto Forti ◽  
Fernando Cesar Sala ◽  
Simone Daniela Sartorio de Medeiros ◽  
...  
Keyword(s):  
Production Systems ◽  
Organic Fertilizers ◽  
Conventional System ◽  
Hydroponic System ◽  
Significant Difference ◽  
Sensory Analyses ◽  
Chlorophyll Index ◽  
Hydroponic Systems ◽  
The One ◽  
System F

Abstract The consumption and cultivation of curly kale in Brazil is recent and information on production systems and their acceptance by the consumer are scarce. The aim of this work was to evaluate the sensory characteristics of curly kales cultivated using the conventional and hydroponic systems, considering the treatments: cultivation under the conventional system, without fertilization (A), conventional system with organic fertilizers (C, E) and hydroponic system (F). The harvests were performed at 60, 90 and 120 days after planting for the plants cultivated using the conventional system and at 30 days for the hydroponic system. The total chlorophyll index content and the sensory analyses of ranking of difference and acceptance were analyzed. The lowest chlorophyll index in the curly kales was verified for the one cultivated under the hydroponic system. In the ranking test, the darkest green color was obtained for the curly kale produced using the conventional system and for the attributes aroma, sweet and bitter taste and crunchiness, there was no significant difference.

scholarly journals Will Coffee Filters Work As A Semipermeable Membrane To Protect Hydroponic Systems?

2019 ◽  
Vol 131 ◽  
pp. 01026
Author(s):  
Yu Xie
Keyword(s):  
Arable Land ◽  
Economic Loss ◽  
Semipermeable Membrane ◽  
Hydroponic System ◽  
Jar Test ◽  
Innovative Solution ◽  
Harmful Organisms ◽  
Hydroponic Systems ◽  
The Cost ◽  
The Impact

With the impact of decreasing arable land and the rapid growth of global population, more people are beginning to attach importance to hydroponic systems, which is an innovative solution that may efficiently solve this problem. The incredible growth of the global hydroponic market has already raised many entrepreneurs’ or even countries’ attentions. There is a multitude of research, which has already proven that plants grow much faster in hydroponic systems, and have more nutrients than plants grown from soil. However, many scientists also found out that having a totally closed system may also promote the spread of pathogens and pests, which can cause a great amount of economic loss to hydroponic operators. Therefore, reliable and efficient methods of preventing harmful organisms to enter the system are imperative and crucial for ensuring successful hydroponics management. This research was done in order to discover if there is a semipermeable membrane which can block the algae or fungus outside, but allow the dissolved nutrients to enter the hydroponic system. In addition, this would reduce the cost of cleaning hydroponic systems and utilize a material that is friendly to the environment. It was hypothesized that by combining several coffee filters, which are biodegradable, this goal may be accomplished. In the first experiment, a cup with coffee filters was placed in algae water to observe if coffee filters can work efficiently for at least 3 days. In the second experiment, a “jar test” was performed for different types of filters, and it was indicated that essential coffee filters can block out algae by 100%. Finally, the last experiment involved implementing the filters in a hydroponic system. The results show that coffee filters in the hydroponic system are capable of blocking out most of algae.

Vegetable Cultivation with Hydroponic System Nutrient Film Technique In Karang Taruna Gendowang Village

2021 ◽  
Vol 2 (1) ◽  
pp. 1-7
Author(s):  
Saufik Luthfianto ◽  
M Haidar Aji Pratama ◽  
Afrizal Aimudin
Keyword(s):  
Agricultural Area ◽  
Agricultural System ◽  
Agricultural Systems ◽  
Hydroponic System ◽  
Knowledge And Skills ◽  
Nutrient Film Technique ◽  
Hydroponic Systems ◽  
Initial Survey ◽  
Initial Method ◽  
Vegetable Cultivation

The result of initial survey in Gendowang Village, Moga District, Pemalang regency is an area with a large potential agricultural area with a total land of 82 ha more and the average population is farming, so it is very potential in developing agricultural systems with hydroponic systems. Enthusiastic citizens are seen at the time of socialization activities. The initial method of applying this technology is an approach to the community, then socialization and workshop. The method used in developing this agricultural system is the application of hydroponic methods with NFT systems. The result is by increasing knowledge and skills in the insertion of this method by 43.95%.       

Sign in / Sign up

Export Citation Format

Share Document