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Title
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Rapid root assimilation of added phosphorus in a lowland tropical rainforest of French Guiana
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Author
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Abstract
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| Tree growth on weathered soils in lowland tropical forests is limited by low phosphorous (P) availability. However, nutrient manupulation experiments do not always increase the P content in these trees, which raises the question whether trees are taking up added P. In French Guianese lowland rainforest, we measured changes in nitrogen (N) and P availability before and up to two months after N and P fertilizer addition, in soils with intact root systems and in soils where roots and mycorrhizal fungi were excluded by root exclusion cylinders. When the root system was excluded, P addition increased P availability to a much greater extent and for a longer time than in soils with an intact root system. Soil N dynamics were unaffected by root presence/absence. These results indicate rapid P uptake, but not N uptake, by tree roots, suggesting a very effective P acquisition process in these lowland rainforests. |
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Language
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English
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Source (journal)
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Soil biology and biochemistry. - Oxford
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Publication
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Oxford
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2020
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ISSN
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0038-0717
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DOI
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10.1016/J.SOILBIO.2019.107646
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Volume/pages
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140
(2020)
, 3 p.
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Article Reference
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107646
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ISI
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000501414200014
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Medium
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E-only publicatie
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Full text (Publisher's DOI)
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Full text (open access)
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Full text (publisher's version - intranet only)
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