PHYTOMONITORING™ in CROP GROWTH CONTROLAVOCADO Application of the Phytomonitoring techniques for adjustment and validation of irrigation scheduling Phytech.

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Presentation transcript:

PHYTOMONITORING™ in CROP GROWTH CONTROLAVOCADO Application of the Phytomonitoring techniques for adjustment and validation of irrigation scheduling Phytech LTD. 2005

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-5R Air Temperature Air Temperature and Humidity Sensor and Humidity Sensor (-10 to 50 °C ; 0 to 100 %RH) 1 x RS-ATH-5R Air Temperature Air Temperature and Humidity Sensor and Humidity Sensor (-10 to 50 °C ; 0 to 100 %RH) 2 x RS-DE-1R Dendrometer (0 to 10 mm stroke) 2 x RS-DE-1R Dendrometer (0 to 10 mm stroke) 2 x RSD-SMS-2R Soil Moisture Sensor (0 to 50 vol. %) OR RS-TM-2R Twin Tensiometer (0 to 84 cbar) 2 x RSD-SMS-2R Soil Moisture Sensor (0 to 50 vol. %) OR RS-TM-2R Twin Tensiometer (0 to 84 cbar) Stationary Data Concentrator Stationary Recommended setup for Avocado PhytoGraph™ Software Portable Data Shuttle Portable

PHYTOMONITORING™ in CROP GROWTH CONTROL Irrigation scheduling 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 µm 350 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 monitoring 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 VPD Soil moisture

PHYTOMONITORING™ in CROP GROWTH CONTROLSummary 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.