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Foliar Nutrient and Tree Growth Response of Mixed-conifer Stands to Three Fertilization Treatments in Northeast Oregon and North Central Washington Item Info

The results of two studies evaluating nutrient uptake in mixed-conifer stands following fertilization are reported. The four species examined were Douglas-fir, grand fir, lodgepole pine and ponderosa pine. The fertilization treatments were 224 kg ha-1 nitrogen, 224 kg ha-1 nitrogen plus 112 kg ha-1 sulfur, and 224 kg ha-1 nitrogen plus 190.4 kg ha-1 potassium. Foliar nutrient concentrations, contents and ratios were analyzed, as well as four-year volume response. Douglas-fir showed both N and S deficiencies in control foliage samples, and produced significant growth response to the N + S treatment, but not to the N-alone treatment. Grand fir also showed foliar N and S deficiencies, but produced significant growth response to both N and N + S fertilization. This suggests that grand fir was better able to utilize N than Douglas-fir even under S-limiting conditions. Lodgepole pine showed deficient foliar N and S concentrations, and produced significant volume responses to N and N + K fertilization. Lodgepole volume response to N + S fertilization was highly variable, and appeared to be site specific. Ponderosa pine did not show nutrient deficiencies for N or K, and did not respond significantly in either foliar K or S levels or in growth to N, N + K or N + S fertilization. This suggests that nutrient deficiency may not have been a factor limiting foliar nutrient response and growth for ponderosa pine.

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Title:
Foliar Nutrient and Tree Growth Response of Mixed-conifer Stands to Three Fertilization Treatments in Northeast Oregon and North Central Washington
Creator:
Garrison, M.T.; Moore, J.A.; Shaw, T.M.; Mika, P.G.
Date Created (ISO Standard):
1999-07-28
Description:
The results of two studies evaluating nutrient uptake in mixed-conifer stands following fertilization are reported. The four species examined were Douglas-fir, grand fir, lodgepole pine and ponderosa pine. The fertilization treatments were 224 kg ha-1 nitrogen, 224 kg ha-1 nitrogen plus 112 kg ha-1 sulfur, and 224 kg ha-1 nitrogen plus 190.4 kg ha-1 potassium. Foliar nutrient concentrations, contents and ratios were analyzed, as well as four-year volume response. Douglas-fir showed both N and S deficiencies in control foliage samples, and produced significant growth response to the N + S treatment, but not to the N-alone treatment. Grand fir also showed foliar N and S deficiencies, but produced significant growth response to both N and N + S fertilization. This suggests that grand fir was better able to utilize N than Douglas-fir even under S-limiting conditions. Lodgepole pine showed deficient foliar N and S concentrations, and produced significant volume responses to N and N + K fertilization. Lodgepole volume response to N + S fertilization was highly variable, and appeared to be site specific. Ponderosa pine did not show nutrient deficiencies for N or K, and did not respond significantly in either foliar K or S levels or in growth to N, N + K or N + S fertilization. This suggests that nutrient deficiency may not have been a factor limiting foliar nutrient response and growth for ponderosa pine.
Subjects:
research fertilizer timber (lumber) statistics
Source:
Garrison, M.T., J.A. Moore, T.M. Shaw, P.G. Mika. 2000. Foliar Nutrient and Tree Growth Response of Mixed-Conifer Stands to Three Fertilization Treatments in Northeast Oregon and North Central Washington. Forest Ecology and Management. 132: 183-198.
Source Identifier:
Foliar_Nutrient_Tree_Growth_Response_Mixed-Conifer_Stands_3_Fert_Treatments_NE_Oregon_NC_Washington_FEM_2000
Type:
Text
Format:
application/pdf

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Preferred Citation:
"Foliar Nutrient and Tree Growth Response of Mixed-conifer Stands to Three Fertilization Treatments in Northeast Oregon and North Central Washington", Intermountain Forestry Cooperative, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iftnc/items/iftnc4825.html
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This document is provided by the University of Idaho Library for use by University of Idaho students, staff, and faculty. All rights to the document linked from this metadata belong to the author, rights holder, and/or provider. For more information contact The Intermountain Forestry Cooperative, https://www.uidaho.edu/cnr/ifc
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