Vesicular-Arbuscular Mycorrhiza and Soil Fertility Influence Mineral Concentrations in Seedlings of Eight Hardwood Species

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1992-12-01
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Kormanik, Paul
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Schultz, Richard
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Forestry
The forestry major prepares students to apply scientific principles to forests, including management, conservation and restoration of forest ecosystems as well as provision of wood and non-wood products from forests. Students first enroll in courses in biology, math and environmental sciences to prepare for upper-level courses in forestry. As they become more familiar with forests and forest management, students can choose one or more of four options in which to pursue advanced coursework. The educational programs in Forestry (Options in Forest Ecosystem Management, Natural Resource Conservation and Restoration, and Urban and Community Forestry) leading to the degree B.S. in Forestry are candidates for accreditation by the Society of American Foresters (SAF) under the forestry standard. The program in forestry provides you with an understanding of the following areas: forest ecosystems, wood technology and products, forest resource management, agro-forestry, urban and community forestry, biodiversity, water quality, wilderness areas and wildlife.
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Eight hardwood species were grown under two sets of fertilizer and vesicular–arbuscular mycorrhizae (VAM) treatments. In the first study three treatments of 140, 560, and 1120 kg/ha of 10– 10– 10 (% N, P2O5, and K2O, respectively) fertilizer were added to fumigated soil with or without a mixture of Glomusmosseae Nicol. and Gerd. and Glomusetunicatus Becker and Gerd. (GM). In the second study, seedlings were grown with VAM treatments of (i) the same Glomus(GM) mixture as in study 1, (ii) Glomusfasiculatus (Thaxter) Gerd. and Trappe (GF), or (iii) mixed cultures of several Glomus and Gigaspora species (GG). A fertilizer treatment of 280 kg/ha of 10– 10– 10 was added to all seedlings. All treatments, in both studies, also received 10 equal applications of NH4NO3, totaling 1680 kg/ha, during the growing season. No single nutrient was consistently higher in nonmycorrhizal or VAM seedlings in either study and no symbiont produced consistently high concentrations of all nutrients in all species. Uninoculated seedlings frequently had higher N, K, Ca, and Mg concentrations than VAM seedlings. Inoculated seedlings generally had higher total P concentrations than uninoculated seedlings. For uninoculated seedlings of five of the species, P concentrations increased with higher fertility levels. Seedlings inoculated with GM and GG had higher P concentrations than those inoculated with GF. In numerous instances, uninoculated seedlings had higher mineral concentrations than VAM seedlings even though the uninoculated seedlings were always the smallest. This suggests that VAM provide stimulation other than or in addition to the enhanced nutrient uptake

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This article is from Canadian Journal of Forest Research 12 (1982): 829, doi:10.1139/x82-124.

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