The effects of container geometry on water and heat regimes in soilless culture: lettuce as a case study

Heller, Hadar; Bar‐Tal, Asher; Assouline, S.; Narkis, Kfir; Suryano, Shoshana; Forge, Amandine de la; Barak, Mordechai; Alon, H.; Bruner, M.; Cohen, Shabtai; Tsohar, Dov

doi:10.1007/s00271-014-0448-y

Cited by 23 publications

(16 citation statements)

References 39 publications

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“…These results are partially similar to what Heller et al (2015) reported, on evaluating the effect of irrigations frequency and vessels geometry on lettuce, which had plants cultivated in smaller vessels with high irrigation frequency to present more leaves as non-commercial quality.…”

Section: Resultssupporting

confidence: 90%

Lettuce Growth in Different Pot Volumes and Irrigation Frequencies Under Saline Stress

Targino¹,

Oliveira²,

Oliveira³

et al. 2019

JAS

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This study aimed to evaluate lettuce production in different pot volumes and different irrigation frequency under saline stress. The experiment was carried out at the Department of Environmental and Technological Sciences of the Federal Rural University of the Semi-Arid, in Mossoró, RN, Brazil. Randomized block experimental design was used in factorial scheme of 2 × 3 × 3, with 3 replicates. Treatments were consisted of 2 water’s salinity levels (0.5 and 2.0 dS m-1), 3 frequencies of irrigation (6, 9, and 12 daily events), and 3 different pots (0.5, 1.0, and 3.0 L). Data from parameters evaluated at harvest were submitted to variance analysis and means were compared. We verified that when the lower saline water (0.5 dS m-1) was used lettuce production increased when cultivated in pots of 3.0 L and submitted to 6 daily events of irrigation. When 3.0 dS m-1 water was used the best results were obtained in 0.5 L and nine daily events of irrigation. The combination of 0.5 L pot and six or nine daily events of irrigation better inhibited the damaging effects of salinity.

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Section: Resultssupporting

confidence: 90%

Lettuce Growth in Different Pot Volumes and Irrigation Frequencies Under Saline Stress

Targino¹,

Oliveira²,

Oliveira³

et al. 2019

JAS

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“…) thereby avoiding some of the complexities of changes in crop biomass allocation during the reproductive process (Heller et al. ). The study was conducted indoors using only artificial lighting, as this is the dominant approach found in most urban vertical farming projects, especially in plant factory designs (Kang et al.…”

Section: Introductionmentioning

confidence: 99%

“…The aim of this study was to compare a vertical column VFS and a conventional horizontal hydroponic system (HHS) with similar fertigation regimes, root zone volumes, and planting densities to determine whether VFS represents a viable alternative to HHS. Lettuce was used as a model plant as it is widely grown in hydroponics as a rapidly growing leafy vegetable (Safaei et al 2015) thereby avoiding some of the complexities of changes in crop biomass allocation during the reproductive process (Heller et al 2014). The study was conducted indoors using only artificial lighting, as this is the dominant approach found in most urban vertical farming projects, especially in plant factory designs (Kang et al 2014;He et al 2015) and allows more precise control of environmental conditions (Poorter et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Vertical farming increases lettuce yield per unit area compared to conventional horizontal hydroponics

Touliatos

Dodd

McAinsh

2016

Food and Energy Security

199

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Vertical farming systems (VFS) have been proposed as an engineering solution to increase productivity per unit area of cultivated land by extending crop production into the vertical dimension. To test whether this approach presents a viable alternative to horizontal crop production systems, a VFS (where plants were grown in upright cylindrical columns) was compared against a conventional horizontal hydroponic system (HHS) using lettuce (Lactuca sativa L. cv. “Little Gem”) as a model crop. Both systems had similar root zone volume and planting density. Half‐strength Hoagland's solution was applied to plants grown in perlite in an indoor controlled environment room, with metal halide lamps providing artificial lighting. Light distribution (photosynthetic photon flux density, PPFD) and yield (shoot fresh weight) within each system were assessed. Although PPFD and shoot fresh weight decreased significantly in the VFS from top to base, the VFS produced more crop per unit of growing floor area when compared with the HHS. Our results clearly demonstrate that VFS presents an attractive alternative to horizontal hydroponic growth systems and suggest that further increases in yield could be achieved by incorporating artificial lighting in the VFS.

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“…Comparable conditions have been observed and described for potting containers at plant nurseries (Cassel and Neilsen, 1986; Handreck and Black, 2002; Heller et al, 2015) and for the maintenance of golf courses and sports fields (McCoy, 2014), but this hydraulic condition is not incorporated into most green roof models (Li and Babcock, 2014). Programs commonly used by design and engineering consultants, such as EPA‐SWMM (Rossman and Huber, 2015), treat the water holding capacity of a green roof medium as a fixed property throughout the profile.…”

mentioning

confidence: 99%

The Effect of Intraparticle Porosity and Interparticle Voids on the Hydraulic Properties of Soilless Media

Hill

Sleep

Drake

et al. 2019

Vadose Zone Journal

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Core Ideas Green roofs comprise a soilless medium over an atmospheric equilibrated space. Green roofs represent microcosms of capillary fringe and vadose zone hydraulics. Bulk properties come from the interparticle voids and the intraparticle pores. Capillary retention is fundamental for water storage in a green roof system. Design specifications for green roofs should focus on using a well‐graded medium. An essential component of a building‐integrated vegetation system, such as an extensive green roof, is the layer of lightweight planting medium that supports rooting and stores water. Predicting and describing the stormwater management performance of green roofs requires reliable data regarding the water retention properties of the planting medium. Ten materials proposed for use on green roofs, including four mineral components, three biological components, and three commercial blends, were characterized through measurement of their water release curves (WRCs). In combination with the particle size distributions, the resultant data demonstrate that some of the materials contain measurable intraparticle pore networks in addition to the interparticle void spaces described in classical soil hydrology. The WRCs were also used to model the maximum water storage under static equilibrium conditions throughout a 15‐cm profile of each material. In freely draining, unsaturated green roof systems, the role of the intraparticle pores may be limited to increasing microscale roughness of particle surfaces, thereby reducing film flow under drier conditions. The highly organic, biologically derived materials—screened compost, bark fines, and shredded wood—demonstrated hydrophobicity when air dried, but wetting occurred within <30 min on all occasions, which would be within the time frame of many rainstorms. As with natural soils, the saturated hydraulic conductivity was lower in materials with a higher proportion of fines (<106 μm).

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The effects of container geometry on water and heat regimes in soilless culture: lettuce as a case study

Cited by 23 publications

References 39 publications

Lettuce Growth in Different Pot Volumes and Irrigation Frequencies Under Saline Stress

Lettuce Growth in Different Pot Volumes and Irrigation Frequencies Under Saline Stress

Vertical farming increases lettuce yield per unit area compared to conventional horizontal hydroponics

The Effect of Intraparticle Porosity and Interparticle Voids on the Hydraulic Properties of Soilless Media

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