A synthesis of AOT40-based response functions and critical levels of ozone for agricultural and horticultural crops

• Crop-response data from over 700 published papers and conference proceedings have been analysed with the aim of establishing ozone dose-response functions for a wide range of European agricultural and horticultural crops. Data that met rigorous selection criteria (e.g. field-based, ozone concentrations within European range, full season exposure period) were used to derive AOT40-yield response functions for 19 crops by first converting the published ozone concentration data into AOT40 (AOT40 is the hourly mean ozone concentration accumulated over a threshold ozone concentration of 40ppb during daylight hours, units ppmh). For any individual crop, there were no significant differences in the linear response functions derived for experiments conducted in the USA or Europe, or for individual cultivars. Three statistically independent groups were identified: ozone sensitive crops (wheat, water melon, pulses, cotton, turnip, tomato, onion, soybean and lettuce); moderately sensitive crops (sugar beet, potato, oilseed rape, tobacco, rice, maize, grape and broccoli) and ozone resistant (barley and fruit represented by plum and strawberry). Critical levels of a 3 month AOT40 of 3 ppm It and a 3.5 month AOT40 of 6ppm h were derived from the functions for wheat and tomato, respectively. (c) 2006 Elsevier Ltd. All rights reserved.

Subject headings

NATURVETENSKAP  -- Biologi (hsv//swe)

NATURAL SCIENCES  -- Biological Sciences (hsv//eng)

Keyword

ozone

crops

response functions

critical levels

yield

AOT40

OPEN-TOP CHAMBERS

ELEVATED CARBON-DIOXIDE

SOIL-WATER DEFICIT

AMBIENT

OZONE

PHASEOLUS-VULGARIS

YIELD RESPONSES

SULFUR-DIOXIDE

NEW-GENERATION

TUBER YIELD

GROWTH

Publication and Content Type

ref (subject category)

art (subject category)