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- Title
Influence of Arbuscular Mycorrhizal (AM) Symbiosis on Phosphorus Leaching through Soil Cores.
- Authors
Asghari, H. R.; Chittleborough, D. J.; Smith, F. A.; Smith, S. E.
- Abstract
Two experiments with soil cores were carried out to investigate the effects of arbuscular mycorrhizal (AM) fungal colonization on mobility of phosphorus (P) during leaching of repacked columns of a soil with a loamy sand texture. Trifolium subterraneum plants inoculated with an AM fungus or not inoculated were grown in cores with low or high P concentrations for 8 or 10 weeks in the glasshouse. Cores were then irrigated with 2500 mL water and the leachate collected. Plant growth and the amounts of P removed by plants, remaining in soil as available P and removed dissolved in leachate were measured. Mycorrhizal fungal colonization and development of external hyphae were also determined. Inoculation and/or P application significantly increased plant growth and plant P removal and decreased P leaching. In low P soils AM fungal colonization significantly increased plant P uptake and decreased soil available P and total dissolved P in leachates. Lower P leaching from cores with AM plants under low P conditions was related to enhancement of plant growth and to scavenging and removal of P from the soil by roots and/or external hyphae. When P was applied AM effects were not observed and available P remaining in the soil after leaching was much higher, regardless of AM fungal colonization.
- Subjects
SUBTERRANEAN clover; MYCORRHIZAL fungi; SOIL leaching; SYMBIOSIS; PHOSPHORUS in agriculture; FUNGAL colonies; HYPHAE of fungi; PLANT-soil relationships
- Publication
Plant & Soil, 2005, Vol 275, Issue 1/2, p181
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-005-1328-2