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Using VA-Mycorrhizae to Enhance Seedling Root Growth in Compacted Soil

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A greenhouse study was conducted to determine if the root growth of yellow-poplar and sweetgum seedlings grown in compacted soil could be enhanced by inoculating the seedlings with the vesicular-arbuscular mycorrhizal fungi Glomus macrocarpum or G. fasciculatum. Root growth of both tree species was significantly reduced as bulk density increased. Inoculated yellow-poplar seedlings had greater root weight at each bulk density than noninoculated seedlings. Root length was not significantly influenced by mycorrhizal treatments at higher bulk densities, and fibrosity responses to mycorrhizal treatments varied at each bulk density. Mycorrhizal dependency, the degree to which a plant is dependent on the mycorrhizal association to produce its maximum growth, was the same for yellow-poplar seedlings inoculated with either fungal species. Results indicate that mycorrhizal colonization may not improve root growth of yellow-poplar at higher bulk densities. At each bulk density, sweetgum seedlings inoculated with G fasciculatum had the greatest root weight, length, and fibrosity, and the highest mycorrhizal dependency values, indicating that effects of compaction can be alleviated for sweetgum by inoculation with this mycorrhizal fungus. North. J. Appl. For. 5:65-68, March 1988.

Document Type: Journal Article

Affiliations: Department of Forestry and Natural Resources, Purdue University, West Lafayette, IN 47907

Publication date: March 1, 1988

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  • Each regional journal of applied forestry focuses on research, practice, and techniques targeted to foresters and allied professionals in specific regions of the United States and Canada. The Northern Journal of Applied Forestry covers northeastern, midwestern, and boreal forests in the United States and Canada.
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