Skip to main content

Microbial Recolonization of a Fumigated Nursery Soil

Buy Article:

$29.50 plus tax (Refund Policy)

Abstract:

Soil fumigation with methyl bromide resulted in the dominance among the fungi of Trichoderma species and Penicillium piscarium in both the soil and rhizosphere. The inoculum source was a pine needle mulch applied following fumigation. Application of a microbiologically different mulch resulted in a different fungal population which was still detectable after 4 months. The fungal population in the subsurface soil remained at a very low level throughout the study period of 7 months. The bacteria responded immediately and strongly to fumigation. Numbers in the subsurface soil subjected to high levels of methyl bromide exceeded the numbers in the controls 10 to 20 times immediately after removal of the fumigation covers. Their populations fell sharply but remained above the control populations throughout the study. The fungal species isolated from the rhizosphere were the same as those isolated from the soil, but 7 of the 19 species isolated from surface-sterilized roots were not recorded from either the soil or rhizosphere. Larger numbers of fungi in genera known to include plant pathogens were isolated from the surface-sterilized root tips of seedlings grown in nonfumigated soil than from fumigated soil. Clamp-bearing basidiomycetes were isolated from roots from all treatments. Histological and morphological examinations of roots indicated that fumigation delayed mycorrhiza formation for several weeks and altered the fungal symbionts involved.

Keywords: Penicillium piscarium; Pinus taeda; Trichoderma; mycorrhizae; rhizosphere

Document Type: Journal Article

Affiliations: Professor, Department of Soil Science, North Carolina State University at Raleigh

Publication date: 1969-12-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
  • Submit a Paper
  • Membership Information
  • Author Guidelines
  • Podcasts
  • Ingenta Connect is not responsible for the content or availability of external websites
  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more