INTERNATIONAL Solutions for soil, plant & meteorology www.ictinternational.com.au Plant Water Use and “Behaviour” INTERNATIONAL Michael Forster PhD (UNSW)

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Presentation transcript:

INTERNATIONAL Solutions for soil, plant & meteorology Plant Water Use and “Behaviour” INTERNATIONAL Michael Forster PhD (UNSW) Plant and Soil Scientist

INTERNATIONAL Solutions for soil, plant & meteorology Tree Water Use Total Tree Water Use Hydraulic Redistribution – Soil – Stem – Leaf Water Potential Gradients

INTERNATIONAL Solutions for soil, plant & meteorology Definition Water Potential: – Free energy associated with water – Free energy is the potential to do work – Water moves from higher to lower potentials – Water moves from mountains to ocean

INTERNATIONAL Solutions for soil, plant & meteorology Definition Water Potential Units of Measurement: J/kgMPaBarsRH Field Capacity Wilting Point Air Dry Oven Dry High Potential Low Potential

INTERNATIONAL Solutions for soil, plant & meteorology Soil-Plant-Atmosphere Continuum Soil = Bar Trunk = -0.8 Bar Leaf cell = -1.0 Bar Leaf air = -7.0 Bar Atmosphere = -100 Bar High Potential Low Potential

INTERNATIONAL Solutions for soil, plant & meteorology Measuring Tree Water Use Heat Ratio Method (HRM) Heat Field Deformation (HFD)

INTERNATIONAL Solutions for soil, plant & meteorology Measuring Tree Water Use

INTERNATIONAL Solutions for soil, plant & meteorology HRM Technique

INTERNATIONAL Solutions for soil, plant & meteorology HRM Technique

INTERNATIONAL Solutions for soil, plant & meteorology Example HRM Data Time Sap Velocity (cm per hour) Data downloaded into Sap Flow Tool software: For analysis and visual presentation Warm weather Nocturnal Sap Flow Cool Weather Diurnal Sap Flow Rain event

INTERNATIONAL Solutions for soil, plant & meteorology Case Study: Stem Hydraulic Redistribution Image from Nadezhdina et al. 2009

INTERNATIONAL Solutions for soil, plant & meteorology Case Study: Stem Hydraulic Redistribution Root Sap Flow Black Line: Northern Grey Line: Southern Image from Nadezhdina et al. 2009

INTERNATIONAL Solutions for soil, plant & meteorology Case Study: Stem Hydraulic Redistribution Stem Sap Flow Black Line: Northern Grey Line: Southern Image from Nadezhdina et al. 2009

INTERNATIONAL Solutions for soil, plant & meteorology Image from Nadezhdina et al Case Study: Stem Hydraulic Redistribution

INTERNATIONAL Solutions for soil, plant & meteorology More Case Studies: Hydraulic Redistribution Please refer to Conference Proceedings Leaf Mediated Hydraulic Redistribution Root Mediated Hydraulic Redistribution

INTERNATIONAL Solutions for soil, plant & meteorology Total Tree Water Use Case Study: Trees as “Biopumps” Antamina Mine Largest mine in Peru US$ 2.26bn investment Copper & Zinc Located 4,300m a.s.l.

INTERNATIONAL Solutions for soil, plant & meteorology Copper & Zinc transported via gravity and water to sea port Filters separate solids from water What to do with all the water??? Total Tree Water Use Case Study: Trees as “Biopumps”

INTERNATIONAL Solutions for soil, plant & meteorology acre afforestation 190,000 trees Several species Trees as Biopumps Mine production dependent on Biopumps Total Tree Water Use Case Study: Trees as “Biopumps”

INTERNATIONAL Solutions for soil, plant & meteorology Total Tree Water Use Case Study: Trees as “Biopumps”

INTERNATIONAL Solutions for soil, plant & meteorology Results from 6 months of sampling Acacia: 3,200 litres Tamarix: 1,500 litres Algorrobo: 600 litres Total Tree Water Use Case Study: Trees as “Biopumps”

INTERNATIONAL Solutions for soil, plant & meteorology More Case Studies: Total Tree Water Use Please refer to Conference Proceedings Northern United Forestry Group: Kamarooka Project

INTERNATIONAL Solutions for soil, plant & meteorology ICT International Pty Ltd Solutions for soil, plant and environmental research Phone: Fax: PO Box 503, Armidale, NSW, Australia, 2350 INTERNATIONAL