Ministry of Forests Forest Science Program
		Abstract for FRDA Report 201

		Review of Western Hemlock Growth Response to Forest Fertilization and Proposals for New Studies
		Authors or Ministry Contacts: Holger Brix
		Branch: Research
		Subject: Fertilization
		Series: FRDA Report
		Other details: Published January 1993

Abstract

Western hemlock growth responses to nitrogen fertilization is reviewed. Specifically, the effects of nitrogen source, nitrogen rate, other nutrient elements, stand thinning, stand age, and site influence are discussed. Studies of the response mechanism, limited to fertilizer effects on foliar nutrient concentrations and damage to roots and mycorrhizae are also reviewed. They offer general guidelines, but no site-specific recommendations. A number of new studies are proposed, based on this review. They include examinations of fertilization with different rates and sources of nitrogen and phosphorus, and investigations of fertilization effects on stem growth, foliar nutrient concentrations, rate of photosynthesis, production of foliage, branch extension, biomass allocation, and damage to roots and mycorrhizae. Also proposes is a comparison of the response to fertilization of hemlock and Douglas-fir in mixed stands.

Download FRDA Report 201 (1305KB)
	To view this document you need the Adobe Acrobat Reader, available for free at the Adobe Web Site.