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Evaluation of the anti-oxidant ethylene diurea (EDU) as a protectant against ozone effects on crops (growth chamber trials)

Description

Results of a field study conducted in the summer of 2000 showed that when the antioxidant ethylene diurea (EDU) was applied to crops, there were increases in several parameters. The next step was... More ≫

Description

Results of a field study conducted in the summer of 2000 showed that when the antioxidant ethylene diurea (EDU) was applied to crops, there were increases in several parameters. The next step was to verify whether the effects of EDU resulted from EDU-mediated protection against ozone or from plant growth promoting effects of EDU that are independent of ozone. A series of controlled environment trials were designed to test this hypothesis.

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Evaluation of the anti-oxidant ethylene diurea (EDU) as a protectant against ozone effects on crops (field trials)

Description

Ozone is an important phytotoxic gaseous pollutant and is known or suspected to cause injury in crops, including yield reductions. Studies have been conducted using the antioxidant EDU (ethylene... More ≫

Description

Ozone is an important phytotoxic gaseous pollutant and is known or suspected to cause injury in crops, including yield reductions. Studies have been conducted using the antioxidant EDU (ethylene diurea) in programs aimed at the quantification of the effects of ozone on vegetation. For the present study, a protocol making use of EDU as an antioxidant was designed and implemented at a site near the city limits of Fort Saskatchewan, Alberta, an area having elevated ozone levels relative to other areas of the province.

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Overview of ground-level ozone observations in Alberta, 1986-1998

Description

This report presents an analysis of ozone data from Alberta air monitoring stations and compares observed data to current and proposed standards. As was found in previous studies, average... More ≫

Description

This report presents an analysis of ozone data from Alberta air monitoring stations and compares observed data to current and proposed standards. As was found in previous studies, average ground-level ozone concentrations in Alberta are higher in rural areas than in city centres.

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Ozone protection in plants : the potential use of chemical protectants to measure atmospheric oxidant damage in Alberta crops

Description

This report was commissioned to provide a review and interpretation of the scientific literature that describes the use and effects of chemical ozone protectants. The authors of this report were... More ≫

Description

This report was commissioned to provide a review and interpretation of the scientific literature that describes the use and effects of chemical ozone protectants. The authors of this report were asked to determine if there was sufficient information available on these substances to warrant a field evaluation of their use. This was done as part of Alberta Environment's efforts to determine if ozone has the potential to cause negative (or positive) effects on plants in the province, with a focus on agricultural crops.

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Ground-level ozone in Alberta

Description

At higher concentrations, ground-level ozone has adverse human health effects, and is one of the most damaging air pollutants to vegetation. In Canada, federal, provincial and territorial... More ≫

Description

At higher concentrations, ground-level ozone has adverse human health effects, and is one of the most damaging air pollutants to vegetation. In Canada, federal, provincial and territorial governments are in the process of reviewing ambient national objectives as well as setting new Canada-wide standards for ozone. Available ambient ozone monitoring information from Alberta has been reviewed, and government agencies, industries and associations involved in monitoring ozone and its precursors have been identified. Also, published literature from Alberta after 1980 has been reviewed.

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