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 McDaniel, M. E. Articles by Dunphy, D. J. Search for Related Content PubMed Articles by McDaniel, M. E. Articles by Dunphy, D. J. Agricola Articles by McDaniel, M. E. Articles by Dunphy, D. J.

Differential Iron Chlorosis of Oat Cultivars¹

Iron chlorosis symptoms of varied severity were observed among oat (Arena byzantina C. Koch) cultivars in field trials at Beeville, Tex., during the 1975 and 1976 seasons. A cultivar exhibiting severe iron chlorosis and one having no apparent chlorosis symptoms in the field were grown in the greenhouse in two different soils known to have low levels of available iron. Growth of the "resistant" cultivar was relatively normal in both soils, whereas leaves of the "susceptible" cultivar were chlorotic, and plant growth was severely retarded. The addition of iron to either soil corrected the chlorosis symptoms of the susceptible cultivar. Plants of the susceptible cultivar grown in iron-treated soil produced more than three times as much aboveground dry matter and more than twice as much crown and root weight as plants grown in untreated soil. Shoot and root yields of the resistant cultivar were influenced only slightly by iron treatment. Knowledge of the sensitivity of oat cultivars to iron chlorosis should be useful in developing new cultivars for areas where iron chlorosis is a problem.

Key Words: Avena • Micronutrient • Calcareous soils

² Associate professor and research associate, Dep. of Soil and Crop Sciences, Texas A&M Univ.

Received for publication June 9, 1977.