Effects of different sources of fertilizer nitrogen on growth and nutrition of western hemlock seedlings.

M.A. Radwan; Dean S. DeBell

doi:10.2737/PNW-RP-267

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Effects of different sources of fertilizer nitrogen on growth and nutrition of western hemlock seedlings.

Informally Refereed

Authors:

M.A. Radwan, Dean S. DeBell

Year:

1980

Type:

Research Paper

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RP-267

Source:

Res. Pap. PNW-RP-267. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p

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Abstract

Twelve different nitrogen (N) fertilizer treatments were tested on potted western hemlock (Tsuga heterophylla (Raf.) Sarg.) seedlings. Fertilizers affected soil N and pH, and growth and foliar chemical composition of seedlings. Urea plus N-Serve and sulfur-coated urea appear more promising for promoting growth than other fertilizers tested. Results, however, do not explain reported variability in response of hemlock stands to N fertilization.

Keywords

Nitrogen fertilizer response, seedling growth, western hemlock, Tsuga heterophylla

Citation

Radwan, M.A.; DeBell, Dean S. 1980. Effects of different sources of fertilizer nitrogen on growth and nutrition of western hemlock seedlings. Res. Pap. PNW-RP-267. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p