HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Heagle, A. S. Articles by Mowry, F. L. Search for Related Content PubMed Articles by Heagle, A. S. Articles by Mowry, F. L. Agricola Articles by Heagle, A. S. Articles by Mowry, F. L.

Injury and Yield Response of Cotton to Chronic Doses of Ozone and Sulfur Dioxide¹

ABSTRACT

Knowledge of relationships between chronic doses of O₃ and crop yield is required to set air quality standards that protect agricultural interests and to determine the need to develop resistant cultivars of sensitive species. Open-top field chamber studies have provided some information of this type for a few crop species including one western cullivar of cotton (Gossypium hirsutum L.). Our objectives were to measure relationships between chronic doses of O₃ and yield of an eastern cotton cultivar and to determine whether these relationships could be affected by chronic doses of SO₂. ‘Stoneville 213’ was exposed in open-top field chambers to five doses of O₃ (seasonal 7 h d^–1 means from 0.026–0.104 µL L^–1) and four doses of SO₂ (seasonal 4 h d^–1 means from 0.00–0.35 µL L^–1), singly, and in all possible combinations. Exposures began when first foliar leaves were expanding and continued until final harvest. Stoneville 213 was sensitive to O₃-induced yield decrease and regression analyses provided models describing this relationship. Compared to cotton yield in charcoal-filtered-air chambers, the measured decrease of cotton yield at levels of O₃ that occurred during the 1982 season at Raleigh, NC was 11%. Doses of SO₂ at levels greater than those occurring regionally did not significantly affect cotton and did not significantly change cotton response to O₃.

Key Words: Gossypium hirsutum • air-pollution stress • seed and fiber properties

¹ Cooperative investigations of the USDA-ARS and the North Carolina State Univ. Paper no. 9845 of the Journal Series of the North Carolina Agricultural Res. Serv., Raleigh, NC 27695-7601. Research partly supported by an Interagency Agreement between the U.S. Environmental Protection Agency (USEPA) and the USDA; Interagency Agreement no. AD-12-F-1-490-2. The use of trade names in this publication does not imply endorsement by the North Carolina Agric. Res. Serv. of the products named, nor criticism of similar ones not mentioned. Although the research described in this article was partly funded by the USEPA, it has not been subjected to the EPA's peer and policy review and may not reflect the views of the Agency.

² Plant Pathologist, USDA-ARS, Dep. of Plant Pathology, Plant Physiologist, USDA-ARS, Dep. of Botany; Statistician, Dep. of Statistics; Professor of Statistics, Dep. of Statistics; and Micrometeorologist, Dep. of Botany; North Carolina State Univ., Raleigh, NC 27695.

Received for publication December 16, 1985.