phytomonitoring™ in crop growth controlavocado application of the phytomonitoring techniques for...
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PHYTOMONITORING™ in CROP GROWTH CONTROL
AVOCADAVOCADOO
ApplicationApplication of the of the
Phytomonitoring Phytomonitoring techniques for techniques for
adjustment and adjustment and validation of validation of
irrigation schedulingirrigation scheduling
Phytech LTDPhytech LTD..20052005
PHYTOMONITORING™ in CROP GROWTH CONTROL
Phytomonitoring is the Information and Decision Support System based on direct measurement of plant conditions
PHYTOMONITORING™ in CROP GROWTH CONTROL
1 x RS-ATH-5R1 x RS-ATH-5R Air TemperatureAir Temperature
and Humidity Sensorand Humidity Sensor(-10 to 50 °C ; 0 to 100 %RH)(-10 to 50 °C ; 0 to 100 %RH)
1 x RS-ATH-5R1 x RS-ATH-5R Air TemperatureAir Temperature
and Humidity Sensorand Humidity Sensor(-10 to 50 °C ; 0 to 100 %RH)(-10 to 50 °C ; 0 to 100 %RH)
2 x RS-DE-1R 2 x RS-DE-1R DendrometerDendrometer
(0 to 10 mm stroke)(0 to 10 mm stroke)
2 x RS-DE-1R 2 x RS-DE-1R DendrometerDendrometer
(0 to 10 mm stroke)(0 to 10 mm stroke)
2 x RSD-SMS-2R Soil 2 x RSD-SMS-2R Soil Moisture SensorMoisture Sensor(0 to 50 vol. %)(0 to 50 vol. %)
ORORRS-TM-2R Twin RS-TM-2R Twin
TensiometerTensiometer(0 to 84 cbar)(0 to 84 cbar)
2 x RSD-SMS-2R Soil 2 x RSD-SMS-2R Soil Moisture SensorMoisture Sensor(0 to 50 vol. %)(0 to 50 vol. %)
ORORRS-TM-2R Twin RS-TM-2R Twin
TensiometerTensiometer(0 to 84 cbar)(0 to 84 cbar)
StationaryStationaryData ConcentratorData Concentrator
StationaryStationaryData ConcentratorData Concentrator
Recommended setup for Recommended setup for AvocadoAvocado
PhytoGraph™ PhytoGraph™ SoftwareSoftware
PhytoGraph™ PhytoGraph™ SoftwareSoftware
PortablePortableData ShuttleData Shuttle
PortablePortableData ShuttleData Shuttle
PHYTOMONITORING™ in CROP GROWTH CONTROL
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Tru
nk
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mm
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Irrigation scheduling Irrigation scheduling based on the trunk daily contraction based on the trunk daily contraction
Trunk diameter diurnal curve reflects the appropriate variations of plant water content. Normally, trunk contracts at daytime due to water loss by transpiration and swells at night while replenishing water reserves.Amplitude of such variations is proportional to water deficit. Thus, the daily contraction amplitude (DCA) may be used as a criterion for scheduling irrigation.In the practical example, shown in the figure, the grower irrigated his plants when DCA exceeds ~200µm.
SOIL MOISTURE
WATERING
160 µm350 µm
200 µm
PHYTOMONITORING™ in CROP GROWTH CONTROL
Continuous recording allows disclosing the intimate effects of plant water state and growth that may be interesting for keen growers.
Other resources of continuous Other resources of continuous monitoringmonitoring
The response of the blossomed avocado tree to irrigation, applied at severe khamsin, is shown in details in the right chart. Correct irrigation allowed to keep the pants safe and to recover their water state after khamsin.
TRUNK
VPDVPD
Soil moisture
PHYTOMONITORING™ in CROP GROWTH CONTROL
SummarySummary
• The recommended PhyTalk Decision-Support unit (DSU) includes the following sensors:
• 2 x Dendrometers (0-10 mm; 1-2 µm resolution)
• 1 x Soil moisture sensors
• Air Temperature and Humidity Sensor
•This DSU allows adjusting irrigation regime according to a preset level of the trunk diameter daily contraction (Adato’s method)
•Trunk diameter trend and diurnal fluctuations may be used for evaluation of environmental effects on plant water state and growth as well as for detecting plant water stress.