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Biomass Allocation of Planted Container-Grown Ponderosa Pine Seedlings with Controlled-Release Fertilizer Incorporated in the Root Plug Item Info

Three controlled-release fertilizers (fast release (FR), moderate release (MR) and slow release (SR) were incorporated in the growing media at rates of 0.8, 1.6 or 3.2 grams per seedling at the time of sowing as supplements to nursery supplied soluble fertilizer. Effects on seedling biomass allocation of the '160/90' container ponderosa pine (Pinus ponderosa Doug. ex Laws) were evaluated in the field. Two years after outplanting, fertilization significantly increased foliage, stem, root and total biomass of ponderosa pine seedlings, but did not change foliage, stem and root dry weight ratios and shoot/root ratios. Fertilization changed height/caliper ratios of ponderosa pine seedlings. For small calipers (>20mm), fertilized seedlings were taller than unfertilized seedlings of the same caliper; however, for larger calipers (>20 mm), fertilized seedlings were shorter than unfertilized seedlings of the same caliper. Caliper was more strongly related to total and component biomass of ponderosa pine than was height. The strong association between caliper and biomass provides an efficient way to measure fertilizer treatment effects on biomass for future studies.

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Title:
Biomass Allocation of Planted Container-Grown Ponderosa Pine Seedlings with Controlled-Release Fertilizer Incorporated in the Root Plug
Creator:
Fan, Z.; Moore, J.A.; Wenny, D.L.
Date Created (ISO Standard):
1999-12-01
Approximated Date:
yes
Description:
Three controlled-release fertilizers (fast release (FR), moderate release (MR) and slow release (SR) were incorporated in the growing media at rates of 0.8, 1.6 or 3.2 grams per seedling at the time of sowing as supplements to nursery supplied soluble fertilizer. Effects on seedling biomass allocation of the '160/90' container ponderosa pine (Pinus ponderosa Doug. ex Laws) were evaluated in the field. Two years after outplanting, fertilization significantly increased foliage, stem, root and total biomass of ponderosa pine seedlings, but did not change foliage, stem and root dry weight ratios and shoot/root ratios. Fertilization changed height/caliper ratios of ponderosa pine seedlings. For small calipers (>20mm), fertilized seedlings were taller than unfertilized seedlings of the same caliper; however, for larger calipers (>20 mm), fertilized seedlings were shorter than unfertilized seedlings of the same caliper. Caliper was more strongly related to total and component biomass of ponderosa pine than was height. The strong association between caliper and biomass provides an efficient way to measure fertilizer treatment effects on biomass for future studies.
Subjects:
research (document genres) fertilizer timber (lumber) statistics
Location:
North and Central Idaho; Eastern Washington; Western Montana; Northeastern Oregon
Publisher:
Intermountain Forest Tree Nutrition Cooperative, University of Idaho, College of Forest, Wildlife and Range Sciences, Moscow
Source:
Fan, Z., J.A. Moore, D. L. Wenny, 1999. IFTNC Supplemental Report No. 8, Biomass Allocation of Planted Container-Grown Ponderosa Pine Seedlings with Controlled- Released Fertilizer Incorporated in the Root Plug. IFTNC, FWR, Univ. of Idaho, Moscow.
Source Identifier:
Biomass_Allocation_of_Planted_Container-Grown_PP_Seedlings_Controlled-Release_Fertilizer_In_Root_Plug_IFTNC_1999
Type:
Text
Format:
application/pdf
Language:
eng

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Preferred Citation:
"Biomass Allocation of Planted Container-Grown Ponderosa Pine Seedlings with Controlled-Release Fertilizer Incorporated in the Root Plug", Idaho Forestry Research Collection, University of Idaho Library Digital Collections, https://www.lib.uidaho.edu/digital/forestryresearch/items/forestryresearch906.html
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