INFLUENCE OF SODIUM CHLORIDE AND CALCIUM FOLIAR SPRAY ON HYDROPONICALLY GROWN PARSLEY IN NUTRIENT FILM TECHNIQUE SYSTEM

2012 ◽  
Vol 35 (10) ◽  
pp. 1457-1467 ◽  
Author(s):  
Sofia Chondraki ◽  
Costas Tzerakis ◽  
Nikos Tzortzakis
Keyword(s):  
Sodium Chloride ◽  
Foliar Spray ◽  
Nutrient Film Technique ◽  
Hydroponically Grown ◽  
Technique System

Urban Wastewater Treatment by a Nutrient Film Technique System with a Valuable Commercial Plant Species (Chrysanthemum cinerariaefoliumTrev.)

2002 ◽  
Vol 36 (9) ◽  
pp. 2101-2106 ◽  
Author(s):  
Nathalie Vaillant ◽  
Fabien Monnet ◽  
Philippe Vernay ◽  
Huguette Sallanon ◽  
Alain Coudret ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Plant Species ◽  
Urban Wastewater ◽  
Commercial Plant ◽  
Nutrient Film Technique ◽  
Urban Wastewater Treatment ◽  
Technique System

scholarly journals Effect of Greenhouse CO2 Supplementation on Yield and Mineral Element Concentrations of Leafy Greens Grown Using Nutrient Film Technique

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 323 ◽  
Author(s):  
Hardeep Singh ◽  
Megha R. Poudel ◽  
Bruce L. Dunn ◽  
Charles Fontanier ◽  
Gopal Kakani
Keyword(s):  
Dry Weight ◽  
Co2 Concentration ◽  
Greenhouse Production ◽  
Leafy Greens ◽  
Greenhouse Study ◽  
Nutrient Film Technique ◽  
Swiss Chard ◽  
Photosynthetic Assimilation ◽  
Carbon Dioxide Co2 ◽  
Hydroponically Grown

Carbon dioxide (CO2) concentration is reported to be the most important climate variable in greenhouse production with its effect on plant photosynthetic assimilation. A greenhouse study was conducted using a nutrient film technique (NFT) system to quantify the effect of two different levels of CO2 (supplemented at an average of 800 ppm and ambient at ~410 ppm) on growth and nutritional quality of basil (Ocimum basilicum L.) ‘Cardinal’, lettuce (Lactuca sativa L.) ‘Auvona’, and Swiss chard (Beta vulgaris L.) ‘Magenta Sunset’ cultivars. Two identical greenhouses were used: one with CO2 supplementation and the other serving as the control with an ambient CO2 concentration. The results indicate that supplemented CO2 could significantly increase the height and width of hydroponically grown leafy greens. Supplemented CO2 increased the fresh weight of basil ‘Cardinal’, lettuce ‘Auvona’, and Swiss chard ‘Magenta Sunset’ by 29%, 24.7%, and 39.5%, respectively, and dry weight by 34.4%, 21.4%, and 40.1%, respectively. These results correspond to a significant reduction in Soil Plant Analysis Development (SPAD) and atLEAF values, which represent a decrease in leaf chlorophyll content under supplemented CO2 conditions. Chlorophyll, nitrogen (N), phosphorus (P), and magnesium (Mg) concentrations were generally lower in plants grown in supplemented CO2 conditions, but the results were not consistent for each species. Supplemented CO2 reduced tissue N concentration for basil ‘Cardinal’ and lettuce ‘Auvona’ but not Swiss chard, while Mg concentration was reduced in supplemented CO2 for Swiss chard ‘Magenta Sunset’ only. In contrast, Fe concentration was increased under supplemented CO2 for basil ‘Cardinal’ only. These findings suggest CO2 supplementation could increase yield of leafy greens grown with hydroponics and have varying impact on different mineral concentrations among species.

scholarly journals 232 Inverse Day/Night Temperature Influences Yield and Canopy Height of Hydroponically Grown Sweetpotato

HortScience ◽  
2000 ◽  
Vol 35 (3) ◽  
pp. 431B-431 ◽  
Author(s):  
D.G. Mortley ◽  
J.H. Hill ◽  
C.K. Bonsi ◽  
W.A. Hill ◽  
C.E. Morris
Keyword(s):  
Canopy Height ◽  
Growth Chamber ◽  
Photon Flux ◽  
Root Production ◽  
Storage Root ◽  
Night Temperature ◽  
Nutrient Film Technique ◽  
Chamber Studies ◽  
Growth Chamber Studies ◽  
Hydroponically Grown

Growth chamber studies were conducted to determine if inverse day/night temperature could control canopy height of sweetpotato without adversely affecting storage root yield. Four 15-cm-long vine cuttings of TU-82-155 sweetpotato were grown in rectangular nutrient film technique hydroponic troughs for 120 days. Two troughs were placed into each of six reach-in growth chambers and subjected to 24/18, 26/20, 28/22, 18/24, 20/26, and 22/28 °C, respectively. Growth chamber conditions included a 12/12-h photoperiod, 70% RH, and photosynthetic photon flux of 1000 μmol·m-2·s-1 at canopy level. Total and edible storage root yields were reduced by 50% among plants grown under cool days/warm nights regimes. Harvest index was similar among treatments except for the low value obtained at 22/28 °C. Canopy height was positively correlated with the change in temperature, and for every 2 °C decrease there was a 3.1 centimeter decrease in canopy height. Inverse day/night temperature effectively controlled canopy height but at the expense of storage root production.

scholarly journals Cadmium accumulation, subcellular distribution and chemical fractionation in hydroponically grown Sesuvium portulacastrum [Aizoaceae]

PLoS ONE ◽  
2020 ◽  
Vol 15 (12) ◽  
pp. e0244085
Author(s):  
Mohammad Mazbah Uddin ◽  
Zhenfang Chen ◽  
Lingfeng Huang
Keyword(s):  
Sodium Chloride ◽  
Soluble Fraction ◽  
Cadmium Accumulation ◽  
Chemical Fractionation ◽  
Body Parts ◽  
Cd Stress ◽  
Sesuvium Portulacastrum ◽  
Polluted Soils ◽  
Cd Accumulation ◽  
Hydroponically Grown

Sesuvium portulacastrum is a well-known halophyte with considerable Cd accumulation and tolerance under high Cd stress. This species is also considered as a good candidate of Cd phytoremediation in the polluted soils. However, the mechanism of Cd accumulation, distribution and fractionation in different body parts still remain unknown. Seedlings of Sesuvium portulacastrum were studied hydroponically under exposure to a range of Cd concentrations (50 μM or μmol/L to 600 μM or μmol/L) for 28 days to investigate the potential accumulation capability and tolerance mechanisms of this species. Cd accumulation in roots showed that the bio-concentration factor was > 10, suggesting a strong ability to absorb and accumulate Cd. Cd fractionation in the aboveground parts showed the following order of distribution: soluble fraction > cell wall > organelle > cell membrane. In roots, soluble fraction was mostly predominant than other fractions. Cd speciation in leaves and stems was mainly contained of sodium chloride and deionised water extracted forms, suggesting a strong binding ability with pectin and protein as well as with organic acids. In the roots, inorganic form of Cd was dominant than other forms of Cd. It could be suggested that sodium chloride, deionised water and inorganic contained form of Cd are mainly responsible for the adaption of this plant in the Cd stress environment and alleviating Cd toxicity.

scholarly journals Effect of Selenium Form and Salicylic Acid on the Accumulation of Selenium Speciation Forms in Hydroponically Grown Lettuce

Agriculture ◽  
2020 ◽  
Vol 10 (12) ◽  
pp. 584
Author(s):  
Iwona Kowalska ◽  
Sylwester Smoleń ◽  
Małgorzata Czernicka ◽  
Maryia Halka ◽  
Kinga Kęska ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Salicylic Acid ◽  
Nutrient Solution ◽  
Metabolic Pathway ◽  
Total Content ◽  
Selenium Speciation ◽  
Nutrient Film Technique ◽  
Hydroponically Grown ◽  
Se Uptake ◽  
Se Speciation

Selenium (Se) uptake by plants depends on its form and salicylic acid (SA) can increase the efficiency of plant biofortification in Se. This study investigated the effects of selenite (Na2SeO3) and selenomethionine (SeMet) applied individually or together with SA on a total content of Se, Se speciation forms, yield and content of sugars and ascorbic acid of lettuce, as well as activity of selenocysteine methyltransferase (smt) and methionine methyltransferase (mmt) genes of the Se metabolic pathway. Lettuce was grown in the nutrient film technique (NFT) system. Se and SA were used at doses of 0.5 and 10.0 mg dm−3 of the nutrient solution, respectively. The treatments were: 1. control, 2. Na2SeO3, 3. Na2SeO3 + SA, 4. SeMet, 5. SeMet + SA, 6. SA. Se was accumulated more in the roots than the leaves. SeMet was more effective in biofortification than Na2SeO3. SA enhanced Se uptake, especially organic Se. Plants supplied with SeMet alone or SeMet + SA accumulated in their leaves mainly SeMet and methylselenocysteine (MeSeCys), while those treated with Na2SeO3 or Na2SeO3 + SA accumulated MeSeCys and selenite (SeO3−2). The roots showed no expression of smt, while the expression of two mmt genes was independent of either Se or SA. The leaves of plants supplied with Na2SeO3 demonstrated the strongest expression of mmt and smt.

scholarly journals Transmission and Persistence of Salmonella enterica in Nutrient Solution of Hydroponic Greenhouse Grown Tomatoes

HortScience ◽  
2017 ◽  
Vol 52 (5) ◽  
pp. 713-718 ◽  
Author(s):  
Shannon M. Coleman ◽  
Bledar Bisha ◽  
Steven E. Newman ◽  
Marisa Bunning ◽  
Lawrence D. Goodridge
Keyword(s):  
Nutrient Solution ◽  
Tomato Fruit ◽  
The United States ◽  
Avirulent Strain ◽  
Culture Methods ◽  
Nutrient Film Technique ◽  
Colony Forming Units ◽  
Fruit Samples ◽  
Automated Ribotyping ◽  
Hydroponically Grown

Hydroponic greenhouse tomato production’s popularity has grown in the United States to meet the demands for year-round availability of fresh tomatoes. Although Salmonella has been the cause of several foodborne illness outbreaks linked to tomatoes, the potential for contamination in hydroponic production is not well understood. The objectives of this study were to determine whether biweekly inoculation of Salmonella in a hydroponic tomato nutrient solution would lead to Salmonella survival and contamination of the tomato fruit and plants, hydroponic nutrient film technique (NFT) troughs, and water receptacles. An avirulent strain of Salmonella Typhimurium was used to contaminate the nutrient solution at a concentration of 105 colony-forming units (CFU)/mL. Inoculation was conducted on day 0 and biweekly until the termination of project at 12 weeks; samples were filtered and plated on selective media. Leaves and biofilm coupons were collected on day 0 and every 2 weeks postinoculation. Leaf samples were analyzed using culture methods. The biofilm coupons were analyzed using tape fluorescence in situ hybridization (FISH) method. Fruit samples were collected 6 weeks postinoculation until termination of project and analyzed using culture methods. Typical Salmonella morphology of colonies on plates streaked from overnight cultures from plant samples were confirmed by automated ribotyping. A 2-log10 reduction of cells was observed in water samples 2 days post initial inoculation. Reduction continued over the 2-week period with few cells surviving until the next inoculation. S. Typhimurium was observed on the surface of the root systems. However, a splash incident resulted in low-level contamination of selected leaves and fruit samples. The results of the study indicate that although contaminated hydroponic nutrient solution led to surface contamination of roots, such an event may not pose a high risk of contamination of hydroponically grown fruit.

scholarly journals High Relative Humidity Increases Yield, Harvest Index, Flowering, and Gynophore Growth of Hydroponically Grown Peanut Plants

HortScience ◽  
2000 ◽  
Vol 35 (1) ◽  
pp. 46-48 ◽  
Author(s):  
D.G. Mortley ◽  
C.K. Bonsi ◽  
P.A. Loretan ◽  
W.A. Hill ◽  
C.E. Morris
Keyword(s):  
Relative Humidity ◽  
Seed Yield ◽  
Harvest Index ◽  
Photon Flux ◽  
Solution Ph ◽  
Seed Maturity ◽  
Temperature Regimes ◽  
Nutrient Film Technique ◽  
Total Seed ◽  
Hydroponically Grown

Growth chamber experiments were conducted to study the physiological and growth response of peanut (Arachis hypogaea L.) to 50% and 85% relative humidity (RH). The objective was to determine the effects of RH on pod and seed yield, harvest index, and flowering of peanut grown by the nutrient film technique (NFT). `Georgia Red' peanut plants (14 days old) were planted into growth channels (0.15 × 0.15 × 1.2 m). Plants were spaced 25 cm apart with 15 cm between channels. A modified half-Hoagland solution with an additional 2 mm Ca was used. Solution pH was maintained between 6.4 and 6.7, and electrical conductivity (EC) ranged between 1100 and 1200 μS·cm–1. Temperature regimes of 28/22 °C were maintained during the light/dark periods (12 hours each) with photosynthetic photon flux (PPF) at canopy level of 500 μmol·m–2·s–1. Foliage and pod fresh and dry weights, total seed yield, harvest index (HI), and seed maturity were greater at high than at low RH. Plants grown at 85% RH had greater total and individual leaflet area and stomatal conductance, flowered 3 days earlier and had a greater number of flowers reaching anthesis. Gynophores grew more rapidly at 85% than at 50% RH.

scholarly journals Potassium and calcium enrichment alleviate salinity-induced stress in hydroponically grown endives

2010 ◽  
Vol 37 (No. 4) ◽  
pp. 155-162 ◽  
Author(s):  
N.G. Tzortzakis
Keyword(s):  
Stomatal Conductance ◽  
Plant Growth ◽  
Photosynthetic Rate ◽  
Crop Yields ◽  
Nutrient Balance ◽  
Calcium Nitrate ◽  
Foliar Spray ◽  
Leafy Vegetables ◽  
Nacl Salinity ◽  
Nutrient Film Technique

Salinity either of soil or of irrigation water causes disturbance in plant growth and nutrient balance and reduces crop yields. The effects of NaCl salinity and/or calcium or potassium level on the plant growth and severity of gray mold (Botrytis cinerea [De Bary] Whetzel) were investigated in endive (Cichorium endivia L., cv. Green Curled) grown with the nutrient film technique under greenhouse conditions during early spring. Plants were supplied with nutrient solutions containing 40 mmol/l of sodium chloride (NaCl) and/or 10 mmol/l potassium sulphate (K<sub>2</sub>SO<sub>4</sub>). Additionally, plants treated with foliar spray of 15 mmol/l calcium nitrate [(CaNO<sub>3</sub>)<sub>2</sub>] or distilled water. Salinity or K- and Ca-enrichment mainly affected the upper part of endive plants and reduced leaf area. However, when salinity combined with either K- or Ca-enrichment, the negative impact of salinity on plant growth was reversed. Salinized and/or K- and Ca-enriched, plants did not differ in plant biomass, leaf/root ratio, leaf fresh weight, leaf number, and root length. Salinity did not have any impacts on photosynthetic rate, stomatal conductance, and intercellular CO<sub>2</sub> concentration. Indeed, photosynthetic rate and stomatal conductance increased with Ca foliar application and decreased with K while the opposite effects were observed for the intercellular CO<sub>2</sub> concentration. Total nutrient uptake was reduced 2-fold in salt-treated plants compared to controls. No symptoms of tip-burn or blackheart were recorded throughout the experimental study. Endive grown in the nutrient film technique had tolerance to NaCl salinity, and this method could be used to exploit saline water in soilless culture. These findings also suggest that a proper management of the salt concentration of the nutrient solution plus external elemental enrichment may provide an efficient tool to improve the quality of leafy vegetables with little effect on yield.

scholarly journals Effects of Electrical Conductivity, pH, and Foliar Application of Calcium Chloride on Yield and Tipburn of Lactuca sativa Grown Using the Nutrient–Film Technique

HortScience ◽  
2020 ◽  
Vol 55 (8) ◽  
pp. 1265-1271
Author(s):  
Uttara Samarakoon ◽  
Jack Palmer ◽  
Peter Ling ◽  
James Altland
Keyword(s):  
Electrical Conductivity ◽  
Calcium Chloride ◽  
Foliar Application ◽  
Maximum Yield ◽  
Foliar Spray ◽  
Yield Reduction ◽  
Nutrient Film Technique ◽  
Constant Ph ◽  
Ph Management ◽  
The Impact

Yield reduction resulting from high temperatures and tipburn are common issues during the summer for hydroponically grown lettuce using the nutrient–film technique (NFT). We investigated the yield and degree of tipburn of lettuce ‘Red Butter’, ‘Green Butter’, and ‘Red Oakleaf’ of the Salanova® series under different-solution electrical conductivity (EC) and pH levels. We also quantified the effect of foliar spray application of calcium chloride (CaCl2) on the yield and degree of tipburn using the lettuce cultivar Green Butter. For the EC experiment, the plants were grown at four EC levels (1.4, 1.6, 1.8, or 2.0 mS·cm–1) and a constant pH of 5.8. For the pH experiment, the plants were grown at and four pH levels (5.8, 6.0, 6.2, or 6.4) and a constant EC of 1.8 mS·cm–1. For the foliar spray experiment, CaCl2 was applied 1 week after transplanting into NFT channels at three different concentrations: 0, 200, 400, or 800 mg·L calcium (Ca). During the EC trial, the maximum yields were observed at or more than 1.8 mS·cm–1 for ‘Green Butter’ (263 ± 14 g/head) and ‘Red Butter’ (202 ± 8 g), and more than 1.6 mS·cm–1 for ‘Red Oakleaf’ (183 ± 6 g). The yield of ‘Green Butter’ was 75 g less at 1.4 mS·cm–1 compared with 1.8 mS·cm–1. Tipburn symptoms were less at 1.4 mS·cm–1 for ‘Green Butter’ whereas other cultivars were not highly susceptible. In pH trials, the maximum yield for all cultivars was found at pH 6.0 and 6.2. There were no differences in tipburn symptoms among all pH levels. The foliar spray treatment, twice a week at 400 or 800 mg·L–1 Ca, provided improved tipburn control, as the tipburn symptoms were minimal and the impact on yield was minor compared with reducing EC. This series of experiments found evidence in proper EC and pH management for optimum yield and tipburn control in NFT lettuce grown in summer conditions.

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