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Title: Intercropped silviculture systems, a key to achieving soil fungal community management in eucalyptus plantations

Fungi are ubiquitous and important contributors to soil nutrient cycling, playing a vital role in C, N and P turnover, with many fungi having direct beneficial relationships with plants. However, the factors that modulate the soil fungal community are poorly understood. We studied the degree to which the composition of tree species affected the soil fungal community structure and diversity by pyrosequencing the 28S rRNA gene in soil DNA. We were also interested in whether intercropping (mixed plantation of two plant species) could be used to select fungal species. More than 50,000 high quality sequences were analyzed from three treatments: monoculture of Eucalyptus; monoculture of Acacia mangium; and a mixed plantation with both species sampled 2 and 3 years after planting. We found that the plant type had a major effect on the soil fungal community structure, with 75% of the sequences from the Eucalyptus soil belonging to Basidiomycota and 19% to Ascomycota, and the Acacia soil having a sequence distribution of 28% and 62%, respectively. The intercropping of Acacia mangium in a Eucalyptus plantation significantly increased the number of fungal genera and the diversity indices and introduced or increased the frequency of several genera that were not found inmore » the monoculture cultivation samples. Our results suggest that management of soil fungi is possible by manipulating the composition of the plant community, and intercropped systems can be a means to achieve that.« less
Authors:
;  [1] ;  [2] ;  [2] ;  [3] ;  [4] ;  [2]
  1. Embrapa Solos (Brazil)
  2. Federal University of Rio de Janeiro (Brazil)
  3. Embrapa Agrobiologia (Brazil)
  4. Michigan State Univ., East Lansing, MI (United States)
Publication Date:
OSTI Identifier:
1188329
Grant/Contract Number:
FC02-07ER64494
Type:
Accepted Manuscript
Journal Name:
PLoS ONE
Additional Journal Information:
Journal Volume: 10; Journal Issue: 2; Journal ID: ISSN 1932-6203
Publisher:
Public Library of Science
Research Org:
CTCCR; FCB; RSP; GMC; ASR; JMT
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English