We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Effects of soil compaction on phosphorus uptake and growth of <em>Trifolium subterraneum</em> colonized by four species of vesicular arbuscular mycorrhizal fungi.
- Authors
Nadian, H.; Smith, S. E.; Alston, A. M.; Murray, R. S.; Siebert, B. D.
- Abstract
The ability of four species of vesicular arbuscular mycorrhizal (VAM) fungi to increase phosphorus uptake and growth of clover plants (<em>Trifolium subterraneum L.</em>) at different levels of soil compaction and P application was studied in a pot experiment. Dry matter in the shoots and roots of clover plants decreased with increasing soil compaction. Colonization by <em>Glomus intraradices</em> Schenek & Smith and <em>Glomus</em> sp. City Beach WUM 16 increased plant growth and P uptake up to a bulk density of 160 Mg m-a, although the response was smaller as soil compaction was increased. <em>Glomus etunicatum</em> Becker & Gcrdeman and <em>Glomus mosseae</em> (Nicol. & Gerd.) Gerdermann & Trappe had no effect on the shoot d. wt and P uptake when the bulk density of the soil was &ges; 140 and &ges; 1.60 Mg m³ respectively. Soil compaction to a bulk density of 1.60 Mg m-3 had no effect on the percentage of root length colonized by <em>G. intraradices</em> and <em>Glmus</em> sp. City Beach, but total root length colonized decreased as soil compaction was increased. Decreased P uptake and growth of clover plants colonized by <em>G. intraradices</em> and Glomus sp. City Beach, with increasing soil compaction up to a bulk density of 1.60 Mg m ³, was mainly attributed to a significant reduction in total root length colonized and in the hyphal biomass. Soil compaction, which increased bulk density from 1.20 to 1.75 Mg m ³, reduced the O2 content of the soil atmosphere from 0.16 to 0.05 m³ m³ . The absence of any observable mycorrhizal growth response to any of the four species of VAM fungi in highly compacted soil (bulk density = 1.75 Mg mm³) was attributed to the significant decrease in the O2 content of the soil atmosphere, change in soil pore size distribution and, presumably, to ethylene production.
- Subjects
EFFECT of soil compaction on plants; SUBTERRANEAN clover; FUNGI; PHOSPHORUS; MYCORRHIZAL plants; PLANT growth
- Publication
New Phytologist, 1998, Vol 140, Issue 1, p155
- ISSN
0028-646X
- Publication type
Article
- DOI
10.1046/j.1469-8137.1998.00219.x