Sap Flow and Mine Site Rehabilitation
Sap flow measurements can be used to assess tree species tolerance to mine site rehabilitation. Three Eucalyptus species from a mine site in western Victoria were monitored over a 18 month period for their tolerance to highly degraded soil and extreme weather conditions.
Innovative technology to measure the direct water use in trees
International Food and Agricultural Congress
February 15-19th, 2012 Turkey
By Ghazi Abu Rumman
Scheduling the irrigation system (frequency and volume) is important to conserve water resources, particularly under
drought conditions. Several factors affect the required volume of irrigation such as irrigation method, soil water
intake characteristics, actual soil water content, and soil type.
The amount of irrigation applied to a crop should match actual water use of that crop. This will improve efficiency
and reduce the impact of drought on farm production. Given best horticultural management practices of planting
density and pruning, there is a gap in the knowing how much a crop uses water. Subsequently water schedules are not
meeting the plant water requirements and there are significant inefficiencies in irrigation scheduling.
Measuring meteorological data and using these data to estimate the plant water use via potential evapotranspiration
models has a potential to lead to either under or over irrigation. Direct measurements of plant water use avoid this
problem and should be adopted where practical. It is possible with the latest technology to measure total plant
water use through measuring stem sap flow.
In this study, I used newly developed instruments, based on the Heat Ratio Method (HRM), to continuously
monitor daily water use of citrus trees and olive trees during two months of the growing season.
Water Use in a Plant - Parasite Interaction
Plant parasites have long been studied for the amount of carbon, nitrogen and other nutrients they acquire from their hosts. Water is a critical resource for all organisms yet the amount of water parasites attain from their host has not been widely studied. The primary reason for this shortcoming is simply a lack of appropriate equipment. In a nutshell, it is a very hard thing to measure accurately!
Eddy Flux Tower and Sap Flow (HRM) Measurements
The vertical distribution of sap flow was measured in a 54 year old stand of Picea abies in Europe. Data were compared against Eddy covariance and were also used to validate the gas exchange model, STANDFLUX.
Carbon and Water Monitoring
Carbon and water monitoring can be achieved with sap flow and dendrometer instrumentation. Precision measurements can increase yield and profitability, as well as improving land management and biodiversity.
HRM Sap Flow and Small Stems
Sap Flow in Small Stems outlines how the SFM1 Sap Flow Meter can be installed on stems with a diameter of at least 1cm for precise measurements.
Avocado and Japanese Cedar Case Study
The SFM1 has been widely adopted by researchers in Australia, United States, Germany, Spain, Italy, Brazil, Colombia, Costa Rica and India. Recently, there has been a surge of interest from Japanese researchers and two case studies from Japan are outlined: sap flow in avocado and sap flow in Japanese Cedar
Instrumentation for Total Tree Water Use and Behaviour
Only two techniques can completely account for total plant water use and behaviour: the heat ratio method (HRM); and the heat field deformation (HFD) method. This conference proceeding outlines these techniques and provides several case studies where total water use and plant behaviour have been measured in Australia, North and South America, and Europe.
Sapflow rates of Brazilian Atlantic Rainforest species
Aim: Comparing water use strategies of overstory and understory species along an altitudinal gradient in lowland (266m above sea level) and montane (1,011 m above sea level) Atlantic Rain Forest, South-eastern Brazil.
Eucalypt Woodlot Hydrology
- Obtain base line sapflow data for dry sclerophyll Eucalyptus species on an un-irrigated, inland woodlot with a medium
(approx 670mm ) annual rainfall.
- Compare water use rates of a range of similar Eucalyptus species under the same conditions.
The Kamarooka Project
The aim of the project was to lower the watertable using trees to remediate a salt scald and reclaim pasture land in Bendigo VIC Australia.