NUTRISENSE: a new online portal to calculate nutrient solutions and optimize fertilization of greenhouse crops grown hydroponically

2021 ◽  
pp. 149-156
Author(s):  
D. Savvas ◽  
S. Drakatos ◽  
I. Panagiotakis ◽  
G. Ntatsi
Keyword(s):  
Greenhouse Crops ◽  
Online Portal ◽  
Nutrient Solutions

Evaluation of tomato hybrids with different level of ripe rate under hydroponic conditions (fitopyramide)

2020 ◽  
Author(s):  
M.N. AL-Rukabi ◽  
◽  
V.I. Leunov
Keyword(s):  
Mineral Nutrient ◽  
Tomato Plants ◽  
Agricultural Method ◽  
Seedling Germination ◽  
Greenhouse Tomatoes ◽  
Hydroponic Conditions ◽  
Nutrient Solutions ◽  
Variety Testing

Greenhouse tomatoes are divided into early, medium and late-maturing. The days from seedling germination to the first harvest are taken into account. Tomato has a huge potential for heterosis in terms of precocity, overall yield, signs of resistance and uniformity. The preferred agricultural method is hydroponics, which allows you to grow plants without using soil, only using mineral nutrient solutions in water. The cultivation of tomato plants on the " Fitopyramida " will allow to sell their products in the periods with the highest realized prices. An experiment on variety testing of 11 tomato hybrids of different product groups that differ in precocity allowed us to select the most adapted to the conditions of the " Fitopyramida " technology, including the indeterminate beef Ruddy ball F1, cherry hybrids Elf F1 and orange-fruited cherry Magic harp F1. the determinant hybrid Captain F1 showed Good results.

NITROGEN NUTRITION OF CITRUS NURSERY STOCK IN PINE BARK SUBSTRATES.

HortScience ◽  
1990 ◽  
Vol 25 (9) ◽  
pp. 1161f-1161
Author(s):  
John D. Lea-Cox ◽  
Irwin E. Smith
Keyword(s):  
Nutrient Solution ◽  
Nitrogen Nutrition ◽  
Dry Mass ◽  
Pine Bark ◽  
Growing Period ◽  
Rough Lemon ◽  
Nursery Stock ◽  
Citrus Rootstock ◽  
Cleopatra Mandarin ◽  
Nutrient Solutions

Pine bark is utilized as a substrate in citrus nurseries in South Africa. The Nitrogen (N) content of pine bark is inherently low, and due to the volubility of N, must be supplied on a continual basis to ensure optimum growth rates of young citrus nursery stock. Three citrus rootstock (rough lemon, carrizo citrange and cleopatra mandarin) showed no difference in stem diameter or total dry mass (TDM) when supplied N at concentrations between 25 and 200 mg ·l-1 N in the nutrient solution over a 12 month growing period. Free leaf arginine increased when N was supplied at 400 mg·l-1 N. The form of N affected the growth of rough lemon. High NH4-N:NO3-N (75:25) ratios decreased TDM when Sulfur (S) was absent from the nutrient solution, but not if S was present. Free arginine increased in leaves at high NH4-N (No S) ratios, but not at high NH4-N (S supplied) ratios. Free leaf arginine was correlated with free leaf ammonia. These results have important implications for reducing the concentration of N in nutrient solutions used in citrus nurseries and may indicate that higher NH4-N ratios can be used when adequate S is also supplied.

Removal of Residual Nutrients and Chemical Additives From Secondary Sewage by Reverse osmosis

1975 ◽  
Vol 10 (1) ◽  
pp. 101-109
Author(s):  
H. Kirk Johnston ◽  
H.S. Lim
Keyword(s):  
Reverse Osmosis ◽  
Membrane Fouling ◽  
Pilot Plant ◽  
Waste Treatment ◽  
Iron Chloride ◽  
Treatment Technique ◽  
Chemical Additives ◽  
Cellulose Acetate Membranes ◽  
Municipal Wastewaters ◽  
Nutrient Solutions

Abstract The suitability of reverse osmosis as a renovation technique for the treatment of municipal wastewaters has been assessed. Cellulose acetate membranes capable of 70% and 90% NaCl rejections were employed in both laboratory and pilot plant studies to evaluate the efficiency of this technique in removing the residual precipitant chemicals generally employed in phosphorus removal programs (iron chloride, alum, and lime) and the nutrients (phosphates, nitrates and ammonia) characteristic of municipal wastewaters. Secondary sewage and raw sewage as well as prepared nutrient solutions were employed in the course of this program. Both laboratory and pilot plant studies indicated consistently outstanding removal efficiencies for the species examined, almost independent of the nature of the waste solutions being treated. Permeation of the purified effluent was subject to significant reductions due to membrane fouling. This characteristic was most pronounced for the more permeable (less selective) membranes. Routine chemical and physical cleanings enable satisfactory flux levels to be maintained, thereby suggesting that reverse osmosis may become a viable municipal waste treatment technique.

scholarly journals Silicon attenuates calcium deficiency by increasing ascorbic acid content, growth and quality of cabbage leaves

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Dalila Lopes da Silva ◽  
Renato de Mello Prado ◽  
Luis Felipe Lata Tenesaca ◽  
José Lucas Farias da Silva ◽  
Ben-Hur Mattiuz
Keyword(s):  
Ascorbic Acid ◽  
Nutrient Solution ◽  
Acid Content ◽  
Dry Matter ◽  
Ascorbic Acid Content ◽  
Calcium Deficiency ◽  
Ca Deficiency ◽  
Leaf Water Loss ◽  
Nutrient Solutions

AbstractCalcium (Ca) deficiency in cabbage plants induces oxidative damage, hampering growth and decreasing quality, however, it is hypothesized that silicon (Si) added to the nutrient solution may alleviate crop losses. Therefore, this study aims at evaluating whether silicon supplied in the nutrient solution reduces, in fact, the calcium deficiency effects on cabbage plants. In a greenhouse, cabbage plants were grown using nutrient solutions with Ca sufficiency and Ca deficiency (5 mM) without and with added silicon (2.5 mM), arranged as a 2 × 2 factorial in randomized blocks, with five replications. At 91 days after transplanting, the plants were harvested for biological evaluations. In the treatment without added Si, Ca deficiency promoted oxidative stress, low antioxidant content, decreased dry matter, and lower quality leaf. On the other hand, added Si attenuated Ca deficiency in cabbage by decreasing cell extravasation while increasing both ascorbic acid content and fresh and dry matter, providing firmer leaves due to diminished leaf water loss after harvesting. We highlighted the agronomic importance of Si added to the nutrient solution, especially in crops at risk of Ca deficiency.

scholarly journals Abundant Citizen Science Data Reveal That the Peacock Butterfly Aglais io Recently Became Bivoltine in Belgium

Insects ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 683
Author(s):  
Marc Herremans ◽  
Karin Gielen ◽  
Jos Van Kerckhoven ◽  
Pieter Vanormelingen ◽  
Wim Veraghtert ◽  
...  
Keyword(s):  
Citizen Science ◽  
Western Europe ◽  
Environmental Changes ◽  
Early Summer ◽  
Science Data ◽  
The Public ◽  
Online Portal ◽  
Spring Generation ◽  
Reproductive Cycles ◽  
New Generation

The peacock butterfly is abundant and widespread in Europe. It is generally believed to be univoltine (one generation per year): adults born in summer overwinter and reappear again in spring to reproduce. However, recent flight patterns in western Europe mostly show three peaks during the year: a first one in spring (overwintering butterflies), a second one in early summer (offspring of the spring generation), and a third one in autumn. It was thus far unclear whether this autumn flight peak was a second new generation or consisted of butterflies flying again in autumn after a summer rest (aestivation). The life cycle of one of Europe’s most common butterflies is therefore still surprisingly inadequately understood. We used hundreds of thousands of observations and thousands of pictures submitted by naturalists from the public to the online portal observation.orgin Belgium and analyzed relations between flight patterns, condition (wear), reproductive cycles, peak abundances, and phenology to clarify the current life history. We demonstrate that peacocks have shifted towards two new generations per year in recent decades. Mass citizen science data in online portals has become increasingly important in tracking the response of biodiversity to rapid environmental changes such as climate change.

scholarly journals P051 Symptoms of COVID-19 and anxiety levels in adult patients receiving b-and ts-DMARDS using an online reporting system

Rheumatology ◽  
2021 ◽  
Vol 60 (Supplement_1) ◽  
Author(s):  
May Nwe Lwin ◽  
Christopher Holroyd ◽  
Dinny Wallis ◽  
Saul Faust ◽  
Hans De Graaf ◽  
...  
Keyword(s):  
Lupus Erythematosus ◽  
Joint Pain ◽  
Connective Tissue Diseases ◽  
Anxiety Score ◽  
Online Portal ◽  
Inflammatory Conditions ◽  
Advanced Therapy ◽  
Number Of Patients ◽  
Patient Reported ◽  
Anxiety Levels

Abstract Background/Aims  The coronavirus disease-2019 (COVID-19) caused by the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) is responsible for over 120,000 UK deaths. Those with chronic inflammatory conditions or receiving immunosuppressive medications are at higher risk of COVID-19 than the general population. As a result, rheumatology patients taking b- or ts-DMARDs were advised to shield. We planned to observe COVID-19 related symptoms and anxiety levels reported by rheumatology patients during the pandemic. Methods  From April 2020, 1,004 rheumatology patients from an advanced therapy database were invited to participate in the adult ImmunoCOVID study to collect daily symptoms (fever, cough, shortness of breath (SOB), sore throat, blocked nose, red-eye, headache, fatigue, joint pain, muscle pain, chills, nausea, diarrhoea and vomiting, loss of senses) and anxiety level using an online portal. Loss of senses were not recorded until week 7 as these were not officially recognized at the pandemic onset. Results  153 patients (rheumatoid arthritis, n = 75, psoriatic arthritis, n = 28, Axial spondyloarthropathy, n = 24, systemic lupus erythematosus, n = 2 and other connective tissue diseases, n = 24) consented and participated. By week 25, 142 patients remained. Among those, 36.57% (±6.09%) (average (±SD)) reported no symptoms over the 25 week period. The main symptoms reported were joint pain (mean=47.94%) followed by fatigue (27.17%). Few patients reported fever (0.94%), cough (8.34%), SOB (4.53%), or loss of senses (1.11%) with more symptoms reported during the first 8 weeks (April/May 2020) and another increase in September/October 2020. The anxiety score (pragmatic 10-point scale) mean (±SD) was 5.60 (±0.34) and remained elevated throughout the study though higher when lockdown began. Conclusion  During the first peak of SARS-CoV-2, the number of patients reporting COVID-19 symptoms appeared high and was associated with high levels of anxiety. As only a small number have been swab-tested, this may suggest that larger numbers of untested individuals have had COVID-19 with mild symptoms. Features of inflammatory rheumatic illnesses may mimic COVID-19 symptoms and create diagnostic difficulty (joint pain and fatigue) whilst anxiety may lead to over-reporting of symptoms in the absence of infection. The key symptoms of fever, cough and SOB were less common and may be most reliable. Disclosure  M. Lwin: None. C. Holroyd: None. D. Wallis: None. S. Faust: None. H. De Graaf: None. C.J. Edwards: Honoraria; Abbvie, Biogen, BMS, Celgene, Fresenius, GSK, Janssen, Lilly, Mundipharma, Pfizer, Roche, Sanofi, UCB. Member of speakers’ bureau; Abbvie, Biogen, BMS, Celgene, Janssen, Lilly, Sanofi, Pfizer, Roche. Grants/research support; Abbvie, Biogen, Pfizer. P051 Table 1:patient reported symptoms and anxiety score from immunoCOVID studyWeek & (number of participants)Fever (%)Cough (%)SOB (%)Joint pain (%)Fatigue (%)Loss of senses (%)No symptoms (%)Tested (n)Test positive (n)Anxiety score1 (26)3.857.6911.5446.1530.77NA30.77006.312 (42)2.3311.639.3052.3834.88NA28.57005.833 (69)1.4514.494.3552.1737.68NA23.19415.884 (92)1.0911.966.5254.3531.52NA27.17206.225 (110)0.0011.716.3145.9533.33NA30.00006.156 (108)0.0010.193.7050.0026.85NA34.26205.747 (119)0.8410.084.2049.5828.57NA34.45205.938 (120)0.007.505.0051.6734.170.8329.17305.629 (124)0.817.263.2352.4229.840.8136.29405.6410 (118)0.008.473.3948.3129.660.8534.75205.2811 (116)0.858.476.7849.1529.661.6933.62305.6512 (131)0.006.114.5856.4926.720.7635.11205.4513 (110)0.916.362.7350.0029.091.8242.73105.4414 (121)0.837.442.4847.1125.620.8339.67805.2815 (100)1.007.003.0046.0023.001.0041.00405.4816 (114)0.887.893.5139.4725.441.7542.98905.2717 (105)0.008.573.8144.7622.860.9543.81425.1018 (107)0.006.543.7443.9319.630.9343.93405.3019 (99)0.005.052.0240.4019.191.0145.45505.0820 (110)0.914.552.7350.9124.550.9139.09NA0Missing data21 (106)0.946.602.8350.0020.750.9439.62405.2822 (104)2.889.626.7349.0430.770.9635.58305.5023 (106)1.897.553.7742.4526.420.9436.79805.8924 (108)0.938.332.7844.4422.220.9341.67605.6125 (94)1.067.454.2641.4915.962.1344.68605.49Average0.948.344.5347.9427.171.1136.575.60SD0.972.312.254.395.350.426.090.34Weekly data are the average of daily reported symptoms and anxiety levels.

scholarly journals Halogenated Volatile Organic Compounds in Water Samples and Inorganic Elements Levels in Ores for Characterizing a High Anthropogenic Polluted Area in the Northern Latium Region (Italy)

2021 ◽  
Vol 18 (4) ◽  
pp. 1628
Author(s):  
Mario Vincenzo Russo ◽  
Ivan Notardonato ◽  
Alberto Rosada ◽  
Giuseppe Ianiri ◽  
Pasquale Avino
Keyword(s):  
Organic Compounds ◽  
Mean Value ◽  
Greenhouse Crops ◽  
River Waters ◽  
Liquid Liquid Extraction ◽  
Volatile Organic ◽  
High Concentrations ◽  
Very High ◽  
Inorganic Fraction

This paper shows a characterization of the organic and inorganic fraction of river waters (Tiber and Marta) and ores/soil samples collected in the Northern Latium region of Italy for evaluating the anthropogenic/natural source contribution to the environmental pollution of this area. For organic compounds, organochloride volatile compounds in Tiber and Marta rivers were analyzed by two different clean-up methods (i.e., liquid–liquid extraction and static headspace) followed by gas chromatography–electron capture detector (GC-ECD) analysis. The results show very high concentrations of bromoform (up to 1.82 and 3.2 µg L−1 in Tiber and Marta rivers, respectively), due to the presence of greenhouse crops, and of chloroform and tetrachloroethene, due to the presence of handicrafts installations. For the qualitative and quantitative assessment of the inorganic fraction, it is highlighted the use of a nuclear analytical method, instrumental neutron activation analysis, which allows having more information as possible from the sample without performing any chemical-physical pretreatment. The results have evidenced high levels of mercury (mean value 88.6 µg g−1), antimony (77.7 µg g−1), strontium (12,039 µg g−1) and zinc (103 µg g−1), whereas rare earth elements show levels similar to the literature data. Particular consideration is drawn for arsenic (414 µg g−1): the levels found in this paper (ranging between 1 and 5100 µg g−1) explain the high content of such element (as arsenates) in the aquifer, a big issue in this area.

Sign in / Sign up

Export Citation Format

Share Document