Agronomy Journal Grow Your Career With ASA
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS
QUICK SEARCH:   [advanced]


     

Published online 1 July 1980
Published in Agron J 72:605-608 (1980)
© 1980 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 Smith, R. S.
Right arrow Articles by Ellis, M. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Smith, R. S.
Right arrow Articles by Ellis, M. A.
Agricola
Right arrow Articles by Smith, R. S.
Right arrow Articles by Ellis, M. A.

Soybean Nodulation as Influenced by Seedling Vigor1

R. S. Smith and M. A. Ellis2

Nodulation in soybeans [Glycine max (L.) Merr.] is influenced by environmental, rhizobial, and host symbiont factors. This investigation was conducted to determine the effects of seedling vigor on early soybean nodulation. Seed quality of three soybean cultivars was adjusted using the accelerated aging technique in order to provide seed lots with a high degree of variation in seedling vigor. Seedling vigor was defined as the number of days from planting to emergence. Aged seeds planted in both a sandbench and the field were uniformly inoculated in the furrow with a Rhizobium japonicum liquid inoculum. Days to seedling emergence was negatively correlated with plant top weight, number of tap root nodules, total number of nodules, and nodule dry weight per plant. Significant decreases in the number of tap root nodules and total number of nodules were observed in a sandbench trial between each of the three earliest emerging treatments (4, 5, and 6 days after planting). In all cases, the first plants to emerge had significantly more tap root nodules than the last plants to emerge. Significance in number of nodules/plant and nodule weight/plant between these two treatments was observed in six of the eight instances.

The results suggest that soybean nodulation may be influenced by seedling vigor and that seedlings with uniform vigor should be utilized when conducting nodulation evaluations.

Key Words: Glycine max (L.) Merr. • Nodulation • Nitrogen fixation • Seedling vigor

1 Contribution from the Dep. of Agronomy, Univ. of Illinois, Urbana-Champaign, Urbana IL 61801, and Dep. of Crop Protection, Univ. of Puerto Rico, Mayaguez, P. R. 00708. Research supported by the U.S. Agency for International Development under Contract No. AID/tac-1294

2 Assistant professor of agronomy, Univ. of Illinois (currently research director, Nitragin Co., Inc., Milwaukee, Wis.) and assistant professor of crop protection, Univ. of Puerto Rico, (currently assistant professor, Ohio Agric. Res. and Development Ctr., Wooster, and Ohio State Univ., Columbus, Ohio.), resspectively.

Received for publication March 30, 1979.




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 © 1980 by the American Society of Agronomy.