Effects of nitrogen and phosphorus fertilizers on deer browsing and growth of young Douglas-fir.

Glenn L. Crouch; M.A. Radwan

doi:10.2737/PNW-RN-368

Treesearch

Effects of nitrogen and phosphorus fertilizers on deer browsing and growth of young Douglas-fir.

Informally Refereed

Authors:

Glenn L. Crouch, M.A. Radwan

Year:

1981

Type:

Research Note

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RN-368

Source:

Res. Note PNW-RN-368. U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p

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Abstract

Nitrogen and phosphorus were applied to young Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) trees to determine their effects on deer browsing and tree growth. Nitrogen (N) proauced measurable responses in browsing of terminal shoots and growth of trees the first year, but effects were mostly negligible 2 years after treatments. No responses to phosphorus (P) were detected. Nitrogen and N+P treatments increased the concentration of N in tree foliage the first year, but amount of moisture, ash, calcium, and P were not affected after 2 years.

Keywords

Browse preference, nitrogen fertilizer response, phosphate fertilizer response, Douglas-fir, Pseudotsuga menziesii

Citation

Crouch, Glenn L.; Radwan, M.A. 1981. Effects of nitrogen and phosphorus fertilizers on deer browsing and growth of young Douglas-fir. Res. Note PNW-RN-368. U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 15 p