scholarly journals Environmental Amelioration Through Nutrient Calibration: Maximizing Carbon Sequestration in Hydroponic Greenhouse Production of Lactuca Sativa in Lahore’s Spring

2021 ◽  
Author(s):  
MARIA ANWAR ◽  
ARIFA TAHIR
Keyword(s):  
Lactuca Sativa ◽  
Visual Analysis ◽  
Nutrient Concentrations ◽  
Environmental Study ◽  
International Literature ◽  
Greenhouse Production ◽  
Plant Trials ◽  
Hydroponically Grown ◽  
Optimum Nutrition ◽  
Environmental Amelioration

Abstract This study explores the applicability of internationally prescribed nutrient recipes to greenhouse hydroponic production in Lahore. Lactuca sativa was hydroponically grown at different nutrient concentrations to uncover optimum nutrition for maximum foliage cover. Conclusions were based on visual analysis of foliage cover, as laboratory analysis of trial plants was beyond the scope of this environmental study. Nutrient levels that displayed the best foliage cover in Lahore-based greenhouse during spring weather were different from concentrations kept in US- or Europe-based hydroponic greenhouses. Plant trials conducted for this article explain the adjustments that must be made to hydroponic recipes discussed in international literature; if they are to be used in polyhouse hydroponic production in Lahore’s warmer climate.

scholarly journals Deep Learning Models to Determine Nutrient Concentration in Hydroponically Grown Lettuce Cultivars (Lactuca sativa L.)

2021 ◽  
Vol 14 (1) ◽  
pp. 416
Author(s):  
Mostofa Ahsan ◽  
Sulaymon Eshkabilov ◽  
Bilal Cemek ◽  
Erdem Küçüktopcu ◽  
Chiwon W. Lee ◽  
...  
Keyword(s):  
Computer Vision ◽  
Deep Learning ◽  
Lactuca Sativa ◽  
Precision Agriculture ◽  
Network Models ◽  
Nutrient Concentrations ◽  
Neural Network Models ◽  
Nutrient Levels ◽  
Lactuca Sativa L ◽  
Hydroponically Grown

Deep learning (DL) and computer vision applications in precision agriculture have great potential to identify and classify plant and vegetation species. This study presents the applicability of DL modeling with computer vision techniques to analyze the nutrient levels of hydroponically grown four lettuce cultivars (Lactuca sativa L.), namely Black Seed, Flandria, Rex, and Tacitus. Four different nutrient concentrations (0, 50, 200, 300 ppm nitrogen solutions) were prepared and utilized to grow these lettuce cultivars in the greenhouse. RGB images of lettuce leaves were captured. The results showed that the developed DL’s visual geometry group 16 (VGG16) and VGG19 architectures identified the nutrient levels of lettuces with 87.5 to 100% accuracy for four lettuce cultivars, respectively. Convolution neural network models were also implemented to identify the nutrient levels of the studied lettuces for comparison purposes. The developed modeling techniques can be applied not only to collect real-time nutrient data from other lettuce type cultivars grown in greenhouses but also in fields. Moreover, these modeling approaches can be applied for remote sensing purposes to various lettuce crops. To the best knowledge of the authors, this is a novel study applying the DL technique to determine the nutrient concentrations in lettuce cultivars.

scholarly journals EC Sensitivity of Hydroponically-Grown Lettuce (Lactuca sativa L.) Types in Terms of Nitrate Accumulation

Agriculture ◽  
2021 ◽  
Vol 11 (4) ◽  
pp. 315
Author(s):  
Noémi Kappel ◽  
Ildikó Fruzsina Boros ◽  
Francia Seconde Ravelombola ◽  
László Sipos
Keyword(s):  
Lactuca Sativa ◽  
Nitrate Content ◽  
Saline Condition ◽  
Fresh Weight ◽  
Nitrate Level ◽  
Nitrate Accumulation ◽  
Strong Negative Correlation ◽  
Lactuca Sativa L ◽  
Hydroponically Grown ◽  
European Markets

The goal of this research was to investigate the effect of electrical conductivity (EC) levels of the nutrient solution on the fresh weight, chlorophyll, and nitrate content of hydroponic-system-grown lettuce. The selected cultivars are the most representative commercial varieties grown for European markets. Seven cultivars (‘Sintia,’ ‘Limeira,’ ‘Corentine,’ ‘Cencibel,’ ‘Kiber,’ ‘Attiraï,’ and ‘Rouxaï’) of three Lactuca sativa L. types’ (butterhead, loose leaf, and oak leaf) were grown in a phytotron in rockwool, meanwhile the EC level of the nutrient solutions were different: normal (<1.3 dS/m) and high (10 dS/m). The plants in the saline condition had a lower yield but elevated chlorophyll content and nitrate level, although the ‘Limeira’ and ‘Cencibel’ cultivars had reduced nitrate levels. The results and the special characteristic of the lollo-type cultivars showed that the nitrate level could be very different due to salinity (‘Limeira’ had the lowest (684 µg/g fresh weight (FW)) and ‘Cencibel’ had the highest (4396 µg/g FW)). There was a moderately strong negative correlation (−0.542) in the reverse ratio among the chlorophyll and nitrate contents in plants treated with a normal EC value, while this relationship was not shown in the saline condition. Under the saline condition, cultivars acted differently, and all examined cultivars stayed under the permitted total nitrate level (5000 µg/g FW).

scholarly journals Intraspecific Variability Largely Affects the Leaf Metabolomics Response to Isosmotic Macrocation Variations in Two Divergent Lettuce (Lactuca sativa L.) Varieties

Plants ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 91
Author(s):  
Giandomenico Corrado ◽  
Luigi Lucini ◽  
Begoña Miras-Moreno ◽  
Leilei Zhang ◽  
Christophe El-Nakhel ◽  
...  
Keyword(s):  
Lactuca Sativa ◽  
Plant Secondary Metabolites ◽  
Intraspecific Variability ◽  
Mineral Elements ◽  
Yield And Quality ◽  
Lactuca Sativa L ◽  
Adaptive Mechanisms ◽  
Health Related ◽  
Multiple Mineral ◽  
Hydroponically Grown

Mineral elements are essential for plant growth and development and strongly affect crop yield and quality. To cope with an everchanging environment, plants have developed specific responses to combined nutrient variations. In this work, we investigated the effects of multifactorial treatments with three macrocations (K, Ca, and Mg) on lettuce (Lactuca sativa L.) varieties that strongly diverge in leaf pigmentation (full red or green). Specifically, we monitored main leaf parameters and metabolomics profiles of hydroponically grown plants fed with isosmotic nutrient solutions that have different proportions of macroelements. The result revealed a high biochemical plasticity of lettuce, significantly affected by the genotype, the nutrient solution, and their interaction. Our work also provided evidence and insights into the different intraspecific responses to multifactorial variation of macrocations, with two varieties having distinct strategies to metabolically respond to nutrient variation. Overall, plant adaptive mechanisms increased the phytochemical diversity between the varieties both among and within the main classes of plant secondary metabolites. Finally, our work also implies that the interaction of a pre-existing phytochemical diversity with the management of multiple mineral elements can offer added health-related benefits to the edible product specific to the variety.

Uptake of Perfluorinated Alkyl Acids by Hydroponically Grown Lettuce (Lactuca sativa)

2012 ◽  
Vol 46 (21) ◽  
pp. 11735-11743 ◽  
Author(s):  
Sebastian Felizeter ◽  
Michael S. McLachlan ◽  
Pim de Voogt
Keyword(s):  
Lactuca Sativa ◽  
Hydroponically Grown ◽  
Perfluorinated Alkyl Acids

scholarly journals RESPON PERTUMBUHAN TANAMAN SELADA (Lactuca Sativa L) TERHADAP VOLUME AIR DAN KONSENTRASI LARUTAN NUTRISI GOOD-PLANT SECARA HIDROPONIK

2019 ◽  
Vol 2 (2) ◽  
pp. 43-51
Author(s):  
Nuryulsen Safridar, Sri Handayani
Keyword(s):  
Plant Height ◽  
Lactuca Sativa ◽  
Leaf Age ◽  
Treatment Plant ◽  
Leaf Length ◽  
Plant Nutrients ◽  
Leaf Number ◽  
Water Volume ◽  
Nutrient Concentrations ◽  
Lactuca Sativa L

This study aims to determine the volume of water and the concentration of the nutrient solution and the right good plant to plant growth of lettuce (lactuca sativa L). This research has been carried out in the garden experiment Jabal Ghafur Faculty of Agriculture, University of Sigli. Runs from February to April 2017. This study used a raft floating hydroponics system. Research using completely randomized design (CRD) factorial pattern that is factor of the volume of water and nutrient concentration factor of good-plant. Treatment of the water volume (V) consists of three levels ie (V1) 4 liters of water, (V2) 8 liters of water and (V3) 12 liters of water. Good treatment-plant nutrient concentrations (N) consists of three levels ie (N1) 600 ppm (N2) of 800 ppm and (N3) 1000 ppm, with three replications so overall deplore 27 experimental unit. The volume of water very significant effect on plant height and leaf length aged 10, 20 and 30 days after planting, leaf number aged 20 and 30 days after planting, heavy wet stover age 30 HST, significantly affect the amount of leaf age 10 HST. Good-plant nutrients very significant effect on plant height ages of 20 and 30 days after planting, leaf number and length of leaf age 30 HST, significant effect on plant height HST age 10, age 20 HST leaf length, weight of wet age 30 HST stover.  Keywords: lettuce, hydroponics, water volume and concentration of good-plant nutrients

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 Yield and Mineral Content of Hydroponically Grown Mini-Cucumber (Cucumis sativus L.) as Affected by Reduced Nutrient Concentration and Foliar Fertilizer Application

HortScience ◽  
2017 ◽  
Vol 52 (12) ◽  
pp. 1728-1733 ◽  
Author(s):  
Martin M. Maboko ◽  
Christian Phillipus Du Plooy ◽  
Silence Chiloane
Keyword(s):  
Nutrient Concentration ◽  
Mineral Content ◽  
Dry Weight ◽  
Fertilizer Application ◽  
Production Costs ◽  
Nutrient Concentrations ◽  
Foliar Fertilizer ◽  
Yield And Quality ◽  
Hydroponically Grown

Nutrient application is one of the major inputs required for hydroponic production of cucumbers. Reduced nutrient solution concentration with supplementary foliar fertilizer application may maintain yield and quality of mini-cucumber, while decreasing the production costs. An experiment was conducted to determine the effect of foliar fertilizer in combination with reduced nutrient concentrations on the yield and quality of hydroponically grown mini-cucumber in a plastic tunnel. Mini-cucumber plants were grown in sawdust, fertigated with nutrient solutions containing 100% (control), 75%, 50%, or 25% of the recommended nutrient concentration (NC) and two foliar fertilizer applications (no foliar and foliar application). The highest fresh and dry weight of mini-cucumber plants were obtained with 75% and 100% NC and decreased with 50% to 25% NC application. The number of marketable fruit and marketable yield on mini-cucumbers increased with 75% to 100% NC, followed by 50% NC, as compared with 25% NC. Deformed fruit were significantly lower at 25% NC than at 50%, 75%, and 100% NC. Foliar fertilizer application did not have an effect on mini-cucumber yield, but reduced the yellowing of fruit. Fruit mineral content (P, Fe, and Mn) was significantly improved by 100% NC. Improvement in yield at 75% and 100% NC was as a result of improved plant height, leaf chlorophyll content, plant fresh and dry weight, and the increase in nutrient uptake of N, P, K, and Mn, which was evident in the analysis of cucumber leaves. The reduced NC of 75% can maintain yield and quality of mini-cucumbers, whereas the application of foliar fertilizer had a limited effect.

scholarly journals Effects of Ethylene Diamine Disuccinic Acid (EDDS) on lead (Pb2+) and cadmium (Cd2+) uptake by lettuce (Lactuca sativa L.) seedlings planted in hydroponic solutions

2020 ◽  
Vol 12 (1) ◽  
pp. 426-434
Author(s):  
M.S. Dagari ◽  
M.S. Musa ◽  
F.M. Maude
Keyword(s):  
Lactuca Sativa ◽  
Research Work ◽  
Ethylene Diamine ◽  
High Concentration ◽  
Constant Concentration ◽  
Lactuca Sativa L ◽  
Dry Ashing ◽  
Cadmium And Lead ◽  
Hydroponically Grown ◽  
Very High

This research work was carried out to investigate the effects of ethylene diamine disuccinate (EDDS) on the absorption of cadmium and lead by hydroponically grown lettuce (Lactuca sativa L.). Samples were prepared through digestion (dry ashing) method and the analytes quantitatively analyzed using Atomic Absorption Spectrophotometric (AAS) technique. The effects of EDDS on Pb2+ and Cd2+ uptake by lettuce (Lactuca sativa L.) seedlings replanted in hydroponic solutions for 72 hr in a greenhouse were investigated. Two months old seedlings were exposed to various doses of Pb2+ and Cd2+ at constant concentration of EDDS. For unchelated treatments, increase in concentrations of Pb2+ and Cd2+ in the solution increases the uptake by the plants relative to control.  Pb2+ contents in the roots showed more accumulation than in shoots (p<0.05) while Cd2+ content in the shoots was higher than in roots.  Addition of 0.0025M EDDS to the solutions of Pb2+ and Cd2+ inhibits the uptake of the metal ions at the following concentrations (0.0025, 0.005 and 0.0075 mg/L) when compared to unchelated treatments of same concentrations. At 0.025 mg/L of Pb2+ and Cd2+, chelation substantially enhances their uptakes in both shoot and root of the plant (p<0.05).  Compared to the unchelated treatments, chelation suppresses the translocation of Pb2+ and Cd2+ to the shoots of the plant (p<0.05), but there was a better translocation of Pb2+ (1.257) and Cd2+ (0.953) at 0.025 mg/L, thus indicating that, at very high concentration of the metals the plant was hyper-accumulator. For hydroponic solutions containing the combination of both metals; Pb2+ + Cd2+, Pb2+ uptake was more in the roots than in the shoots while Cd2+ content in the shoots showed more absorption than the roots for both chelated and unchelated treatments. Also, it was observed that chelation suppresses the uptake of Pb2+ and Cd2+ in the presence of one another by both root and shoot. Furthermore, increasing the concentrations of Pb2+ + Cd2+ in chelated treatments of hydroponic solutions results to a better translocation of Pb2+ while the translocation of Cd2+ to the shoot was enhanced. Generally, addition of EDDS to the hydroponic mixtures affected to a large extent the availability of Pb2+ and Cd2+ to the growing seedlings. Keywords: Ethylene diamine disuccinate, greenhouse, hydroponic solution, lettuce, metals.  

scholarly journals Comparative analysis on the photographic self-presentations of the top Philippine universities in their official websites

Plaridel ◽  
2021 ◽  
Author(s):  
AARichela L. Dela Cruz ◽  
Christian Gopez ◽  
Henry Leen Magahis ◽  
Analiza Resurreccion ◽  
Feorillo A. Demeterio III
Keyword(s):  
Higher Education ◽  
Comparative Analysis ◽  
Visual Analysis ◽  
The Philippines ◽  
Educational Institutions ◽  
International Literature ◽  
Student Life ◽  
Collective Self ◽  
The Status ◽  
Self Presentations

This paper is a visual analysis on photographs that were gathered from the main and secondary pages of the websites of the Philippines’ top four higher educational institutions (HEIs), namely University of the Philippines Diliman (UPD), Ateneo De Manila University (ADMU), De La Salle University (DLSU), and University of Santo Tomas (UST). Specifically, this paper used denotative reading, analysis of visual grammar, and connotative reading on the photographs to ascertain how each of these four Philippine HEIs represented their self-images in contradistinction with each other in terms of their teaching, research, extension, internationalization, campus and facilities, and student life, as well as their overall positioning. This paper was able to establish that UPD has strongest self-representation in teaching, and campus and facilities; ADMU in campus and facilities, and teaching; DLSU in teaching and student life; and UST in student life, and campus and facilities. This paper was also able to establish that UPD has the weakest self-representation in extension and internationalization; ADMU in research and extension; DLSU in extension and internationalization; and UST in research and internationalization. This paper is significant as it is the first publication that analyzes the websites of Philippine HEIs and even of Philippine corporations, while contributing to meager international literature on websites of HEIs and corporations. By looking at individual and collective self-representations of the top Philippine HEIs, this paper aims to gather insights on the status of Philippine higher education including the challenges it faces.

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