artificial capillary
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2021 ◽  
Vol 143 (40) ◽  
pp. 16401-16410
Author(s):  
Tuuli A. Hakala ◽  
Emma V. Yates ◽  
Pavan K. Challa ◽  
Zenon Toprakcioglu ◽  
Karthik Nadendla ◽  
...  

Water ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2176
Author(s):  
Davy Sao ◽  
Hirotaka Saito ◽  
Tasuku Kato ◽  
Jirka Šimůnek

Artificial capillary barriers (CBs) are used to improve root zone conditions as they can keep water and nutrients in the root zone by limiting downward percolation. Numerical analysis is one of the promising tools for evaluating CB systems’ performance during the cultivation of leafy vegetables. This study aims to investigate the effects of the CB system on soil water dynamics during spinach cultivation in a soil column under different irrigation scenarios using HYDRUS (2D/3D) by comparing uniform (UNI), line-source (LSI), and plant-targeted (PTI) irrigations combined with alternative irrigation schedules. Simulation results of volumetric soil water contents were generally corresponding to measured data. Simulation results with various hypothetical irrigation scenarios exhibited that the CB was an effective system to diminish percolation losses and improve the root zone’s soil water storage capacity. On the other hand, evaporation loss can be increased as more water is maintained near the surface. While this loss can be significantly minimized by reducing the water application area, the irrigation amount must be carefully defined because applying water in a smaller area may accelerate downward water movement so that the water content at the CB interface can reach close to saturation. In addition to the malfunction of the CB layer, it may also cause a reduction of plant root water uptake (RWU) because the root zone is too wet. Among evaluated irrigation scenarios, irrigating every two days with PTI was the best scenario for the spinach as water use efficiency was greatly improved.


2017 ◽  
Vol 44 (4) ◽  
pp. 1462-1469 ◽  
Author(s):  
Thomas Gaass ◽  
Moritz Jörg Schneider ◽  
Olaf Dietrich ◽  
Michael Ingrisch ◽  
Julien Dinkel

Author(s):  
Ren Koda ◽  
Naoto Hosaka ◽  
Shinya Onogi ◽  
Takashi Mochizuki ◽  
Kohji Masuda ◽  
...  

Author(s):  
Kohji Masuda ◽  
Nobuhiko Shigehara ◽  
Ren Koda ◽  
Nobuyuki Watarai ◽  
Seiichi Ikeda ◽  
...  

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