Plant nitrogen capture from organic matter as affected by spatial dispersion, interspecific competition and mycorrhizal colonization
Article first published online: 24 JAN 2003
Volume 157, Issue 2, pages 303–314, February 2003
How to Cite
Hodge, A. (2003), Plant nitrogen capture from organic matter as affected by spatial dispersion, interspecific competition and mycorrhizal colonization. New Phytologist, 157: 303–314. doi: 10.1046/j.1469-8137.2003.00662.x
- Issue published online: 24 JAN 2003
- Article first published online: 24 JAN 2003
- Received: 6 August 2002 Accepted: 21 October 2002
- arbuscular mycorrhizal (AM) fungi;
- organic material;
- spatial heterogeneity;
- intra- and interspecific competition
- •The capture of nitrogen (N) by plants from N-rich complex organic material differing in spatial (uniform dispersion or discrete patches) heterogeneity was measured, as well as the subsequent impact on N capture of the addition of a mycorrhizal inoculum ( Glomus hoi ).
- •The organic material was dual-labelled with 15 N and 13 C to follow plant uptake of N (as 15 N) and to determine the amounts of original 13 C and 15 N which remained in the soil at harvest. The organic material was added to microcosm units containing Lolium perenne or Plantago lanceolata in intra or interspecific competition.
- •Plant N capture from the dispersed organic material was more than twice that from the discrete patch (dispersed: 17%; discrete: 8%). There was no effect of species composition or the mycorrhizal inoculum on total plant N capture except when in interspecific plant competition. Here, N capture was dependent on the root length produced and was always higher when the mycorrhizal inoculum was present.
- •Mycorrhizal colonization increased N capture from the organic material when in interspecific plant competition but not in monoculture.