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Two-Year Growth Response of Douglas-fir and Ponderosa Pine Seedlings to Boron and Multi-Nutrient Fertilization in Northeast Oregon Item Info

The two-year growth effects for Douglas-fir and ponderosa pine seedlings receiving boron and/or multi-nutrient fertilizer treatments were evaluated on sites with two contrasting parent materials, basalt and andesite, in northeast Oregon. In general, the overall growth effect of fertilization was low and varied by treatment, species and site. In most cases, when boron was applied alone, response was low or antagonistic for both species. Boron in combination with other nutrients did not consistently show higher responses over treatments without B in the mix. However, ponderosa pine at the Noregaard site did show higher response when B was in the fertilizer treatment. Significant (p < 0.10) two-year response was shown for ponderosa pine at Noregaard with 22% and 36% increase in volume growth for the N+B and multi-nutrient with B treatments, respectively. Overall, trees did have better growth response to fertilization at the Noregaard (good rock) basalt site than at the Glass Hill (bad rock) andesite site. The varied and unusually low growth response may be attributed to confounding effects caused by repeated fertilization treatments over the duration of this study.

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Title:
Two-Year Growth Response of Douglas-fir and Ponderosa Pine Seedlings to Boron and Multi-Nutrient Fertilization in Northeast Oregon
Creator:
Terry M. Shaw; Leonard R. Johnson
Date Created (ISO Standard):
2006-12
Description:
The two-year growth effects for Douglas-fir and ponderosa pine seedlings receiving boron and/or multi-nutrient fertilizer treatments were evaluated on sites with two contrasting parent materials, basalt and andesite, in northeast Oregon. In general, the overall growth effect of fertilization was low and varied by treatment, species and site. In most cases, when boron was applied alone, response was low or antagonistic for both species. Boron in combination with other nutrients did not consistently show higher responses over treatments without B in the mix. However, ponderosa pine at the Noregaard site did show higher response when B was in the fertilizer treatment. Significant (p < 0.10) two-year response was shown for ponderosa pine at Noregaard with 22% and 36% increase in volume growth for the N+B and multi-nutrient with B treatments, respectively. Overall, trees did have better growth response to fertilization at the Noregaard (good rock) basalt site than at the Glass Hill (bad rock) andesite site. The varied and unusually low growth response may be attributed to confounding effects caused by repeated fertilization treatments over the duration of this study.
Subjects:
research forest management fertilizer timber (lumber)
Source Identifier:
2006_Shaw_Johnson_IFTNC
Type:
Text
Format:
application/pdf

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Preferred Citation:
"Two-Year Growth Response of Douglas-fir and Ponderosa Pine Seedlings to Boron and Multi-Nutrient Fertilization in Northeast Oregon", Intermountain Forestry Cooperative, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/iftnc/items/iftnc4860.html
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Rights:
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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