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 HighWire Citing Articles via Google Scholar Google Scholar Articles by Jawson, M. D. Articles by Aiken, R. M. Search for Related Content PubMed Articles by Jawson, M. D. Articles by Aiken, R. M. Agricola Articles by Jawson, M. D. Articles by Aiken, R. M.

Soil Fumigation within Monoculture and Rotations: Response of Corn and Mycorrhizae

USEPA, R.S. Kerr Environmental Res. Lab, P.O. Box 1198, Ada, OK 74820

Alan J. Franzluebbers, Deborah K. Galusha and Robert M. Aiken

Dep. of Agronomy, Univ. of Nebraska, Lincoln, NE 68583-0915.

^* Corresponding author.

The causative factors for corn (Zea mays L.) response to methyl bromide (CH₃Br) fumigation, in the absence of known specific pathogens, are unknown. This study was conducted to determine if deleterious nonspecific rhizosphere microorganisms are the causative agents. Soil fumigation was postulated to increase yield of continuous corn but to have less effect on the yield of corn grown in rotation, because more deleterious rhizosphere microorganisms were suspected in monoculture than in rotation. The effects of fumigation and crop rotation on corn grain yield, plant height and P content, available soil N and P, mycorrhizal infection, and soil microbial biomass were investigated at two sites near Mead, NE, on a Sharpsburg silty clay loam soil (fine, montmorillonitic, mesic Typic Argiudoll). Methyl bromide treatments were applied prior to planting for 4 yr at one site and 2 yr at the other site. The sites differed in fertilization, pest management, and crop sequences, but both contained continuous corn. Fumigation resulted in an increase in grain yield under monoculture only once in six site years. Unexpectedly, however, fumigation resulted in a decrease in grain yield under rotation in 7 of 12 observations. Plants in fumigated soil were P-deficient early in the growing season despite similar soil test P concentrations in control and fumigated plots. Fumigation reduced mycorrhizal infection and soil microbial biomass. Mycorrhizal infection of corn shortly after germination appears to be important to initial corn growth in this soil. Fumigating soil revealed a considerable biological influence on corn growth and yield by reducing both deleterious and beneficial microorganisms.

Received for publication August 21, 1992.

This article has been cited by other articles:

				J. L. De Bruin and P. Pedersen Soybean Cultivar and Planting Date Response to Soil Fumigation Agron. J., June 16, 2008; 100(4): 965 - 970. [Abstract] [Full Text] [PDF]

				A. J. Franzluebbers Integrated Crop-Livestock Systems in the Southeastern USA Agron. J., February 6, 2007; 99(2): 361 - 372. [Abstract] [Full Text] [PDF]

				J. Jansa, A. Wiemken, and E. Frossard The effects of agricultural practices on arbuscular mycorrhizal fungi Geological Society, London, Special Publications, January 1, 2006; 266(1): 89 - 115. [Abstract] [PDF]