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


     

Published in Crop Sci 22:970-972 (1982)
© 1982 Crop Science Society of America
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 Smith, G. R.
Right arrow Articles by Hagedorn, C.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Smith, G. R.
Right arrow Articles by Hagedorn, C.
Agricola
Right arrow Articles by Smith, G. R.
Right arrow Articles by Hagedorn, C.

The Effect of Rhizobium trifolii Strains and Crimson Clover Genotypes on N2 Fixation1

G. R. Smith, W. E. Knight, H. L. Peterson and C. Hagedorn2

The effects of crimson clover (Trifolium incarnatum L.) genotype and strain of Rhizobium trifolii on dry weight yield and N2 fixation were investigated in a factorial experiment. The treatments were arranged in a randomized complete block design with eight replications. The clover-Rhizobium combinations were grown in plastic pouches with a N-free nutrient solution. A growth chamber was used to maintain 24/19 C diurnal temperatures and a 12 hour photoperiod.

After 60 days of growth, the combinations were assayed for N2 fixation using acetylene reduction and the plant tops were harvested and dried. Plant lines, strains of Rhizobium and line x strain interaction were all significant sources of variation for both acetylene reduction rate and dry weight yield. Strains had the largest effect, in terms of variance components, on dry weight yield followed by plant lines and strain x line interaction, respectively. Strains also had the largest effect on acetylene reduction rate followed by strain x line interaction and plant lines, respectively. Strain TA1 of R. trifolii was highly variable in its effect on the different plant lines. Response of different inbred lines with this strain ranged from efficient to inefficient.

Key Words: Acetylene reduction • Trifolium incarnatum L. • N2 fixation efficiency

1 Cooperative investigations of the Mississippi Agric. and Forestry Exp. Stn. and ARS-USDA, Mississippi State, MS 39762.

2 Formerly agronomist (now assistant professor, Texas A&M Univ. P.O. Drawer E, Overton, Tx 75684) and research agronomist, Crop Science and Engineering Res. Lab., ARS-USDA and associate agronomists, Mississippi Agric. and Forestry Exp. Stn., Mississippi State, Mississippi 39762.

Received for publication September 8, 1981.




HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
The SCI Journals Agronomy Journal 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 © 1982 by the Crop Science Society of America.