The Use of Thermography Images in the Description of the Humidification Bulb in Soilless Culture

Urrestarazu, Miguel; Gallegos, Victor; Álvaro, Juan E.

doi:10.1080/00103624.2017.1374399

Cited by 11 publications

(6 citation statements)

References 21 publications

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“…To adjust the treatments, in each irrigation the volume (L), pH and EC (dS m -1 ) of the supplied irrigation and drainage were measured; the volume was measured with a graduated cylinder with precision to the hundredths, and pH and EC were measured with an MM40 + (Hach LPV2500.98.0002, Spain). Each new irrigation was performed when 10% of the water readily available in the substrate had been used, and the volume needed to obtain between 20–30% of drainage was added [15, 17] while removing the pegs to avoid the preferential distribution channels of the nutrient solution [18].…”

Section: Methodsmentioning

confidence: 99%

Effects of the electrical conductivity of a soilless culture system on gamma linolenic acid levels in borage seed oil

et al. 2019

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Borage is a well-known plant of great importance in human nutrition and health. Expanding knowledge of particular plants that have anti-cancer products is a global concern. There is substantial information regarding the benefits, presence and extraction of gamma linolenic acid (GLA; 18:3n6) in different plants around the world, especially in borage seeds. However, there is little information concerning the effects of the salinity of the nutrient solution on the growth and presence of GLA in borage seeds. The objective of this work was to determine the optimal salinity of the nutrient solution for obtaining GLA in soilless cultivation systems. Borage plants were grown in coconut fibre and provided three treatments of nutrient solution of 2.20, 3.35 and 4.50 dS m -1 , increasing solution salinity with the standard nutrient solution of concentrated macronutrients as a reference. Vegetative growth, seed production and GLA ratio were measured. The results of vegetative development and GLA production doubled and tripled with the increase in salinity of the nutrient solution, respectively.

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Section: Methodsmentioning

confidence: 99%

Effects of the electrical conductivity of a soilless culture system on gamma linolenic acid levels in borage seed oil

et al. 2019

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“…Fertigation scheduling. Each new fertigation was performed when 10% of the readily available water was used up (Rodríguez et al, 2014;Urrestarazu et al, 2017). The pH and EC of the supplied nutrient solution and the drainages were monitored daily using a Crison MM40 + Conductivimeter and pH meter (LPV2500.98.0002; Hach Ò , Vizcaya, Spain), and the volume (measured in liters) was determined with a graduated cylinder with 100 mL of precision.…”

Section: Methodsmentioning

confidence: 99%

“…The percentage of drained volume was less for CF, whereas EC and water uptake were greater for CF. In relation to EC as a fertigation management reference value, a maximum of 1 to 1.5 units (measured in decisiemens per meter) of EC was established for drainages greater than the input values (nutrient solution) (Urrestarazu, 2004. With this set value, 40% and 30% drainage of the blueberries was observed throughout the crop cycle in CF and sand, respectively.…”

Section: Expt 1: Application Of Silicon In the Nutrient Solutionmentioning

confidence: 99%

“…In addition, in sand, Darnell (1996, 1995) found that the pH decreased from 4.5 to 3.0 when blueberries were supplemented with only N-NH 4 + for 140 d but increased to 6.0 when the plants were supplemented with only N-NO 3 -. Here, we used an average ratio of ammonium to nitric composition similar to the literature in this regard (e.g., Claussen and Lenz, 1999;Cris ostomo-Cris ostomo et al, 2014), and the pH of the drainages compared with the nutrient solution stayed within the desired limits (Urrestarazu, 2004.…”

Section: Expt 2: Ph Of the Nutrient Solution/ Parameters Of Fertigatmentioning

confidence: 99%

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Effect of pH and Silicon in the Fertigation Solution on Vegetative Growth of Blueberry Plants in Organic Agriculture

Gallegos-Cedillo¹,

Álvaro²,

Capatos³

et al. 2018

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The effect of pH and silicon (Si) in the nutrient solution on the vegetative development of 2-year-old blueberry plants (Vaccinium corymbosum L. cv. Ventura) was studied. Two independent experiments were performed on coir fiber (CF) and sand as substrates. In experiment 1, Si was applied in the nutrient solution at a dose of 0.0, 0.3, 0.6, and 1.2 mM. In experiment 2, plants were treated with nutrient solution at pH 4.00, 4.75, 5.50, and 6.25, using two sources of acidification: nitric acid and citric acid. The parameters of plant growth, foliar surface, and stem biomass were measured. With the application of 1.2 mM Si to CF, plant height registered a significant increase of 8%, and shoot dry and fresh biomass increased by 21% and 25%, respectively. The results of experiment 1 indicated that the application of Si benefits the vegetative growth of blueberry plants in CF, but no effect was observed in the sand substrate. In the results of experiment 2, the pH level of 6.25 in CF decreased the dry weight of stems and leaves by 21% and 18%, respectively. A significant increase in the pH range of 4.00 to 5.50 was recorded in both the citric acid and nitric acid treatments, but these significant effects were not found in sand. Citric acid presented a similar behavior to nitric acid, which indicates that it can be a good source of acidification in organic and ecologically friendly crops.

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“…This non-contact and non-destructive technique was used to assess buildings for a couple of decades [1][2][3][4][5][6]. Particularly, when used to evaluate moisture problems [7][8][9][10][11][12], thermal patterns can result from (a) evaporative cooling at the moist area as evaporation decreases surface temperature [13][14][15][16][17][18][19], (b) reduced thermal resistance of the wet materials [20,21], and (c) increased heat storage capacity of the moist material [22,23].…”

Section: Introductionmentioning

confidence: 99%

Quantitative Infrared Thermography to Evaluate the Humidification of Lightweight Concrete

Barreira

Almeida

Simões

et al. 2020

Sensors

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Moisture is one of the major causes of problems in buildings, and it can compromise their performance. Infrared thermography (IRT) is a non-destructive testing technology that can be used to assess the humidification phenomenon and, thus, prevent some of the problems caused by moisture. The images obtained by IRT reflect the thermal patterns of the surface under study and can be evaluated using a quantitative approach, which allows not only the traditional visualization of the thermal patterns but also quantification of surface temperatures and/or their differences. The relevance of this work is related to the discussion of the strengths and weaknesses of several methods to quantitatively assess the humidification phenomenon using IRT. For that purpose, the partial humidification by the bottom surface of a lightweight concrete specimen was considered as a case study. To evaluate the thermal gradients, the evolution of the thermal imaging throughout the measurement period and the definition of the areas particularly affected by moisture, a methodology that included a pre-processing phase for data reduction, followed by a data processing phase, were implemented. In the data processing, different statistical and numerical methods were tested. The results of the statistical descriptive analysis highlighted the time variation of the surface temperature, both when considering the entire specimen and when considering only specific areas. The variability of the temperatures at certain moments of the experiment could be observed in the box-plot representation. The image subtraction proved to be an interesting technique to quantify the temperature differences if the first image was used as reference. A thermal index, TI, was proposed to assess the cooling rate. The index highlighted the initial instant when the effect of moisture on the surface temperature was detectable.

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The Use of Thermography Images in the Description of the Humidification Bulb in Soilless Culture

Cited by 11 publications

References 21 publications

Effects of the electrical conductivity of a soilless culture system on gamma linolenic acid levels in borage seed oil

Effects of the electrical conductivity of a soilless culture system on gamma linolenic acid levels in borage seed oil

Effect of pH and Silicon in the Fertigation Solution on Vegetative Growth of Blueberry Plants in Organic Agriculture

Quantitative Infrared Thermography to Evaluate the Humidification of Lightweight Concrete

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