Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 327488
Title Distribution of mycorrhizal fungal spores in soils under agroforestry and monocultural coffee systems in Brazil
Author(s) Cardoso, I.M.; Boddington, C.L.; Janssen, B.H.; Oenema, O.; Kuyper, T.W.
Source Agroforestry Systems 58 (2003). - ISSN 0167-4366 - p. 33 - 43.
DOI https://doi.org/10.1023/A:1025479017393
Department(s) Sub-department of Soil Quality
Chair Soil Biology and Biological Soil Quality
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2003
Keyword(s) plant-growth - rain-forest - colonization - host
Abstract Deep-rooting trees in agroforestry systems may promote distribution of spores of arbuscular mycorrhizal fungi (AMF) at deeper soil levels. We investigated the vertical distribution of AMF spores in Oxisols under agroforestry and monocultural (unshaded) coffee systems in on-farm experiments ( Brazil). The number of AMF spores was considered as an indicator of mycorrhiza incidence in soil. Spores were extracted from 0-1, 2-3, 5-7.5, 10-15, 20-30, 40-60 cm soil-depths in agroforestry and monocultural coffee systems, of three different age groups (young, medium-aged and old), using centrifugation methods, and counted. Fine roots were collected and dry-weighed from 0-30 cm in young and old systems and from several depths in medium-aged systems. Soils were characterised with respect to texture, pH, organic matter, calcium, magnesium, phosphorus and potassium. Agroforestry had a higher percentage of spores (12-21% of the total number of spores) and roots (on average 1.5 g L-1 soil) in deeper layers (20-60 cm), and a lower percentage (79-88%) closer to the surface (0-15 cm) than the monocultural fields (respectively 3-12%, 0.6 g L-1 soil and 88-97%). Greater numbers of spores in the deeper soil layers may be explained by greater amounts of roots and may be an indicator of greater incidence of mycorrhiza in agroforestry than in monocultural coffee systems. Greater mycorrhizal incidence at deeper soil layers in the agroforestry system may change the dynamics of phosphorus cycling in soil, making this nutrient more available to plants.
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