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Project Title: Response of Young Lodgepole Pine to Spring and Fall Applications of Urea and Ammonium Nitrate Fertilizer
Project Number: EP 886.04 Installation #2
District: Rocky Mountain Forest District
Location: Mt. Sabine
Lat. 50 12'N - Long. 115 46'W		 Opening # 82J012-049
Principal Researcher: R. P. Brockley
Kalamalka Forestry Centre
Vernon, BC		 Phone: (250) 260-4768
e-mail:
Rob.Brockley@gov.bc.ca

Objectives:

  • To compare differences in growth response due to nitrogen source and season of application in young, thinned lodgepole pine.
  • To examine the nature of a N source x season of application interaction.
  • To obtain soil and foliar analysis data to assist in deficiency diagnosis and the interpretation and prediction of fertilization response.

Experimental Design:

Treatments:

  • control (i.e., thinned but not fertilized)
  • 200 kg N/ha (as urea) applied in the fall
  • 200 kg N/ha (as ammonium nitrate) applied in the fall
  • 200 kg N/ha (as urea) applied in the spring
  • 200 kg N/ha (as ammonium nitrate) applied in the spring

Layout:

  • Each treatment is applied to fifteen, 5-m radius "single- tree" plots (5 treatments *15 reps/treatment = 75 plots) arranged in a completely randomized design.
  • The stand was 22 years old at the time of installation establishment.
  • The stand was thinned in 1982 (two years before installation establishment).

History:

  • 1984 Installation establishment, fall fertilization,
  • 1985 Spring fertilization and assessment of 1st year foliar mass response
  • 1987-1996 Assessments on three-year cycle

Status: Dormant

Reports and Publications:

Brockley, R. P. 1989. Response of young lodgepole pine to spring and fall applications of urea and ammonium nitrate fertilizer BC Ministry of Forests, Victoria. Forest Resource Development Agreement Res. Memo. 120.

Brockley, R. P. 1994. Effects of nitrogen source and season of application on the nutrition and growth of lodgepole pine. Can. J. For. Res. 25:516-526.

Brockley, R.P. 1996. Lodgepole pine nutrition and fertilization: a summary of B.C. Ministry of Forests research results. Forestry Canada and BC Ministry of Forests, Victoria. Forest Resource Development Agreement, Rep. 266. 

Brockley, R.P. 2001. Foliar sampling guidelines and nutrient interpretative criteria for lodgepole pine. B.C. Min. For., Research Branch, Victoria. Extension Note 52.

Brockley, R.P. 2001. Fertilization of lodgepole pine in western Canada. In Proc. Enhanced Forest Management: Fertilization and Economics Conference, March 1-2, 2001, Edmonton. pp. 43-54.

Thomson, A, R. Brockley, and J. Saini. 2001. Lodgepole pine foliar nutrient diagnosis and fertilizer advisory system. Online. Canadian Forest Service, Pacific Forestry Centre, Victoria.

Comments: None.