Agronomy Journal Journal of Natural Resources and Life Sciences Education
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 1 January 1979
Published in Agron J 71:121-126 (1979)
© 1979 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Similar articles in this journal
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by White, M. C.
Right arrow Articles by Chaney, R. L.
Right arrow Search for Related Content
PubMed
Right arrow Articles by White, M. C.
Right arrow Articles by Chaney, R. L.
Agricola
Right arrow Articles by White, M. C.
Right arrow Articles by Chaney, R. L.

Differential Cultivar Tolerance in Soybean to Phytotoxic Levels of Soil Zn. I. Range of Cultivar Response1

M. C. White, A. M. Decker and R. L. Chaney2

Heavy metals in waste materials added to agricultural soils can severely inhibit subsequent crop growth. This study was conducted to evaluate the variation in tolerance among cultivars of an agriculturally important plant species to phytotoxic levels of added soil Zn. Twenty soybean (Glycine max L. Merr.) cultivars were screened, through greenhouse pot studies, for their growth response to Zn at pH 5.5 and 6.5 on a Sassafras sandy loam (Fragiudult) amended with 1.31 (control), 131, and 262 ppm Zn. Significant differential responses were found, and the cultivars were grouped into several tolerance and uptake classes, based on the results of the H 6.5, 262-ppm Zn treatment: tolerant (9 to 18% leaf dry weight yield reduction [YR], 5 cultivars), normal (20 to 32% YR, 12 cultivars), sensitive (33 to 48% YR, 3 cultivars); accumulator (696 to 730 pprn trifoliolate leaf Zn, 5 cultivars), normal (549 to 675 ppm Zn, 11 cultivars), and excluder (389 to 540 ppm Zn, 4 cultivars). Soil Zn additions significantly increased root and foliar Mn contents to reported phytotoxic levels at both pH 5.5 and 6.5, but did not influence DTPA-TEA extractable soil Mn. Significant cultivar differences in root and leaf Mn contents were observed. The results of this work illustrate the importance of cultivar selection, not only for field planting of Zn-enriched soils, hut also for its influence on experimental results.

Key Words: Manganese • Metal tolerance • Metal uptake

1 Contribution no. 4530 Scientific Article A2409 of the Maryland Agric. Exp. Stn., Dep. of Agronomy, Univ. of Maryland, College Park, Md., in cooperation with the Biolog. Waste Manage. and Soil Nitrogen Lab., AEQI, Beltsville Agric. Res. Center, USDA-SEA, FR, Beltsville, Md. Part of a thesis submitted by the senior author in partial fulfillment of M.S. degree requirements.

2 Soil scientist, Maryland Environ. Serv., Annapolis, Md.; professor of agronomy, Univ. of Maryland, College Park, Md.; and plant physiologist, USDA-SE.4, FR, Beltsville, Md., respectively.

Received for publication February 16, 1978.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Crop Science Vadose Zone Journal
Journal of Natural Resources
and Life Sciences Education		 Soil Science Society of America Journal
Journal of Plant Registrations Journal of
Environmental Quality		 The Plant Genome
Copyright © 1979 by the American Society of Agronomy.