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Irrigation Scheduling Based on Cumulative Vapour Pressure Deficit to Predict Nursery Tree Water Stress

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dc.contributor.advisor Dixon, Mike Tran, Newton 2016-05-02T15:41:04Z 2016-05-02T15:41:04Z 2016-04 2016-04-12 2016-05-02
dc.description.abstract Ontario tree nurseries are among the heaviest users of irrigation water in the ornamental horticulture sector. Increasing concerns with water conservation, environmental impacts and costs have encouraged the nursery industry to modify its water use, however an effective irrigation management strategy remains elusive. Conventional irrigation scheduling for nursery trees is often based on subjective observations and field experience, which excludes plant water status measurements. Using field-deployable stem psychrometers paired with conventional meteorological measurements, the aim for this thesis was to quantify the relationship between cumulative water potential (CWP) and concurrent cumulative vapour pressure deficit (CVPD) to develop an irrigation scheduling technique which predicts plant water status responses from environmental variables, specifically vapour pressure deficit (VPD). This relationship yielded average slope responses for Thuja occidentalis (L.) of -2.4 MPa*Hrs / kPa*Hrs and for Acer rubrum (L.), -1.5 MPa*Hrs / kPa*Hrs. The CWP/CVPD relationship needs further refinement for irrigation management strategies in a broader selection of nursery trees. en_US
dc.description.sponsorship Ontario Centers of Excellence (OCE), Ontario Ministry of Agriculture Food and Rural Affairs (OMAFRA), ICT International Pty. Ltd, Root Rescue Environmental Pty., Connon Nurseries NVK (Dundas, ON), Connon Nurseries CBV (Waterdown, ON), The Gosling Research Institute for Plant Preservation (GRIPP), Canadian Nursery Landscape Association (CNLA), and Landscape Ontario (LO). en_US
dc.language.iso en en_US
dc.publisher University of Guelph en_US
dc.rights Attribution-NoDerivs 2.5 Canada *
dc.rights.uri *
dc.subject Nursery en_US
dc.subject Pot-in-pot en_US
dc.subject Psychrometer en_US
dc.subject Water Potential en_US
dc.subject Irrigation Schedule en_US
dc.subject Drip irrigation en_US
dc.title Irrigation Scheduling Based on Cumulative Vapour Pressure Deficit to Predict Nursery Tree Water Stress en_US
dc.type Thesis en_US Environmental Sciences en_US Master of Science en_US School of Environmental Sciences en_US University of Guelph en_US

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Attribution-NoDerivs 2.5 Canada Except where otherwise noted, this item's license is described as Attribution-NoDerivs 2.5 Canada
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