You are here: Home
/ Publication Information
Title: Exponential fertilization of Pinus monticola seedlings: nutrient uptake efficiency, leaching fractions, and early outplanting performance
Author: Dumroese, R. Kasten; Page-Dumroese, Deborah S.; Salifu, K. Francis; Jacobs, Douglass F.
Source: Canadian Journal of Forest Research. 35: 2961-2967.
Description: We evaluated nutrient uptake efficiency and subsequent leaching fractions for western white pine (Pinus monticola Dougl. ex D. Don) seedlings grown with exponentially increasing or conventional (constant) fertilization in a greenhouse. Conventional fertilization was associated with higher leachate electrical conductivity and greater nutrient losses, which were more pronounced for the more mobile NO3-N than for NH4-N. Exponential fertilization increased seedling nitrogen (N) uptake efficiency (75%), which helped reduce leaching losses compared to conventional fertilization (50%). Although exponentially fertilized plants received 45% less fertilizer (20 mg N·plant-1) during the establishment and accelerated growth phases compared with conventional cohorts (36 mg N·plant-1), seedling morphological characteristics and nutrient status were similar at the end of greenhouse culture and after 2 years of growth in the field, except that exponential fertilization increased root volume after the first year and also increased ctomycorrhizal colonization. Reduction of applied fertilizer quantities and enhanced fertilizer uptake efficiency through exponential fertilization allows for production of high-quality seedlings while simultaneously minimizing fertilizer inputs and mitigating potential environmental contamination.
Keywords: western white pine, Pinus monticola, seedlings
View or Print this Publication (108 KB)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
Dumroese, R. Kasten; Page-Dumroese, Deborah S.; Salifu, K. Francis; Jacobs, Douglass F. 2005. Exponential fertilization of Pinus monticola seedlings: nutrient uptake efficiency, leaching fractions, and early outplanting performance. Canadian Journal of Forest Research. 35: 2961-2967.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility