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


     


Published online 11 January 2008
Published in Agron J 100:163-168 (2008)
DOI: 10.2134/agrojnl2007.0123
© 2008 American Society of Agronomy
677 S. Segoe Rd., Madison, WI 53711 USA
This Article
Right arrow Figures Only
Right arrow Full Text Free
Right arrow Full Text (PDF) Free
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 HighWire
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by Lehman, R. M.
Right arrow Articles by Rosentrater, K. A.
Right arrow Search for Related Content
PubMed
Right arrow Articles by Lehman, R. M.
Right arrow Articles by Rosentrater, K. A.
Agricola
Right arrow Articles by Lehman, R. M.
Right arrow Articles by Rosentrater, K. A.
Related Collections
Right arrow Microbial Processes
Right arrow Residue management
Right arrow Maize Management

CROP RESIDUES

No Differences in Decomposition Rates Observed between Bacillus thuringiensis and Non-Bacillus thuringiensis Corn Residue Incubated in the Field

R. Michael Lehman*, Shannon L. Osborne and Kurt A. Rosentrater

USDA-ARS-North Central Agricultural Research Lab., 2923 Medary Ave., Brookings, SD 57006

* Corresponding author (michael.lehman{at}ars.usda.gov).

Recent speculation of slower residue decomposition for Bacillus thuringiensis (Bt) corn (Zea mays L.) hybrids compared with non-Bt corn hybrids has prompted investigative study. We evaluated the residue decomposition rates of Bt and non-Bt corn hybrids over a period of 22 mo under field conditions using the litter bag technique. The four corn hybrids used were (i) DKC60–16 (Bt+, Cry1Ab protein active against the leptidopteran European corn borer, event MON810), (ii) DKC60–12 (Bt+, Cry3Bb1 protein active against the coleopteran corn rootworm, event MON863), (iii) DKC60–14 (stacked Bt++, Cry1Ab and Cry3Bb1 proteins) and, (iv) DKC60–15 (Bt, base genetics). The biochemical and physical properties of the corn residues were determined. No differences in the decomposition rates of the residue from the four corn hybrids were detected. Residue decomposition rate constants were approximately 0.25 d–1 for all four hybrids with predicted residue half-lives of about 200 d. No differences in compositional properties, including lignin content, were observed among the four hybrids. Physical compression testing of the chopped residue failed to detect significant differences in mechanical strength properties among the hybrids. This is the first report regarding decomposition of Bt corn residue under field conditions following ambiguous reports from laboratory studies on the relative susceptibility of Bt corn residue to decomposition.

Abbreviations: Bt, Bacillus thuringiensis • GM, genetically modified




This article has been cited by other articles:


Home page
Agron. J.Home page
R. M. Lehman, S. L. Osborne, and K. A. Rosentrater
No Evidence That Bacillus thuringiensis Genes and Their Products Influence the Susceptibility of Corn Residue to Decomposition
Agron. J., November 7, 2008; 100(6): 1687 - 1693.
[Abstract] [Full Text] [PDF]




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 © 2008 by the American Society of Agronomy.