VAM fungus spore populations and colonization of roots of maize and soybean under conventional and low-input sustainable agriculture

D. D. Douds, R. R. Janke, S. E. Peters

Research output: Contribution to journalArticle

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Abstract

Spore populations of vesicular-arbuscular mycorrhizal (VAM) fungi and formation of mycorrhizae in maize (Zea mays L.) and soybean (Glycine max (L.) Merr.) were studied in three farming systems: a conventional maize-soybean rotation and two low-input systems. Spore populations were counted in soil samples obtained at planting and after harvest for two growing seasons. Maize and soybean root systems were sampled for mycorrhizae early in the growing season. Low-input plots tended to have higher populations of spores of VAM fungi than conventionally farmed plots. Further, the readily identifiable species Gigaspora gigantea (Nicol. & Gerd.) Gerdemann & Trappe, was more numerous in low-inputs plots (up to 30 spores 50 cm-3 soil) than in conventional plots (0-0.3 spores 50 cm-3 soil), suggesting farming system affected species distribution as well. Colonization of plants in the field did not always reflect VAM fungus spore populations at planting. Greenhouse bioassays showed 2.5-10 fold greater colonization of plants growing in soil from low-input than conventional systems. The results indicate that conventional farming systems yield lower levels of VAM fungi whereas low-input sustainable agriculture, with cover crops planted between cash crops, has greater populations of VAM fungi and potential to utilize the benefits of VA mycorrhizae.

Original languageEnglish
Pages (from-to)325-335
Number of pages11
JournalAgriculture, Ecosystems and Environment
Volume43
Issue number3-4
DOIs
Publication statusPublished - 1993

Fingerprint

alternative agriculture
sustainable agriculture
mycorrhizal fungi
soybean
spore
colonization
spores
maize
fungus
soybeans
corn
mycorrhiza
farming system
farming systems
mycorrhizae
growing season
soil
planting
Gigaspora
vesicular arbuscular mycorrhizae

ASJC Scopus subject areas

  • Ecology
  • Animal Science and Zoology
  • Agronomy and Crop Science

Cite this

VAM fungus spore populations and colonization of roots of maize and soybean under conventional and low-input sustainable agriculture. / Douds, D. D.; Janke, R. R.; Peters, S. E.

In: Agriculture, Ecosystems and Environment, Vol. 43, No. 3-4, 1993, p. 325-335.

Research output: Contribution to journalArticle

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