scholarly journals Development of Irrigation Control System in Response to Plant Water Stress in Tomato Hydroponics. (2). Irrigation Control Based on a Change of Stem Diameter.

2002 ◽  
Vol 40 (1) ◽  
pp. 91-98 ◽  
Author(s):  
Naoki OISHI
Keyword(s):  
Control System ◽  
Water Stress ◽  
Stem Diameter ◽  
Plant Water ◽  
Plant Water Stress ◽  
Irrigation Control

Use of stem diameter variations to detect plant water stress in tomato

2006 ◽  
Vol 24 (4) ◽  
pp. 241-255 ◽  
Author(s):  
M. Gallardo ◽  
R. B. Thompson ◽  
L. C. Valdez ◽  
M. D. Fernández
Keyword(s):  
Water Stress ◽  
Stem Diameter ◽  
Plant Water ◽  
Plant Water Stress ◽  
Stem Diameter Variations

scholarly journals Leaf compatible “eco-friendly” temperature sensor clip for high density monitoring wireless networks

2017 ◽  
Vol 4 (1) ◽  
pp. 55-60 ◽  
Author(s):  
Valeria Palazzari ◽  
Paolo Mezzanotte ◽  
Federico Alimenti ◽  
Francesco Fratini ◽  
Giulia Orecchini ◽  
...  
Keyword(s):  
Decision Support ◽  
Water Stress ◽  
Temperature Sensor ◽  
Irrigation System ◽  
Fuel Oil ◽  
Plant Water ◽  
Temperature Differential ◽  
Water Pump ◽  
Plant Water Stress ◽  
System A

This paper describes the design, realization, and application of a custom temperature sensor devoted to the monitoring of the temperature differential between the leaf and the air. This difference is strictly related to the plant water stress and can be used as an input information for an intelligent and flexible irrigation system. A wireless temperature sensor network can be thought as a decision support system used to start irrigation when effectively needed by the cultivation, thus saving water, pump fuel oil, and preventing plant illness caused by over-watering.

scholarly journals Reducing the Excessive Evaporative Demand Improved the Water-use Efficiency of Greenhouse Cucumber by Regulating the Trade-off between Irrigation Demand and Plant Productivity

HortScience ◽  
2018 ◽  
Vol 53 (12) ◽  
pp. 1784-1790 ◽  
Author(s):  
Dalong Zhang ◽  
Yuping Liu ◽  
Yang Li ◽  
Lijie Qin ◽  
Jun Li ◽  
...  
Keyword(s):  
Water Stress ◽  
Water Use Efficiency ◽  
Water Flow ◽  
Water Use ◽  
Plant Productivity ◽  
Plant Water ◽  
Evaporative Demand ◽  
Plant Water Stress ◽  
Irrigation Demand ◽  
Use Efficiency

Although atmospheric evaporative demand mediates water flow and constrains water-use efficiency (WUE) to a large extent, the potential to reduce irrigation demand and improve water productivity by regulating the atmospheric water driving force is highly uncertain. To bridge this gap, water transport in combination with plant productivity was examined in cucumber (Cucumis sativus L.) grown at contrasting evaporative demand gradients. Reducing the excessive vapor pressure deficit (VPD) decreased the water flow rate, which reduced irrigation consumption significantly by 16.4%. Reducing excessive evaporative demand moderated plant water stress, as leaf dehydration, hydraulic limitation, and excessive negative water potential were prevented by maintaining water balance in the low-VPD treatment. The moderation of plant water stress by reducing evaporative demand sustained stomatal function for photosynthesis and plant growth, which increased substantially fruit yield and shoot biomass by 20.1% and 18.4%, respectively. From a physiological perspective, a reduction in irrigation demand and an improvement in plant productivity were achieved concomitantly by reducing the excessive VPD. Consequently, WUE based on the criteria of plant biomass and fruit yield was increased significantly by 43.1% and 40.5%, respectively.

Is the Keetch–Byram drought index (KBDI) directly related to plant water stress?

2006 ◽  
Vol 234 ◽  
pp. S27 ◽  
Author(s):  
Gavriil Xanthopoulos ◽  
Georgios Maheras ◽  
Vassiliki Gouma ◽  
Markos Gouvas
Keyword(s):  
Water Stress ◽  
Drought Index ◽  
Plant Water ◽  
Plant Water Stress
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