124-7 Soil Phosphorus Pools and Availability: Responses to Competing Vegetation Control and Organic Matter Retention in 10-Year-Old Douglas-Fir Stands of the Pacific Northwest.

Poster Number 1413

See more from this Division: SSSA Division: Forest, Range & Wildland Soils
See more from this Session: General Forest, Range & Wildland Soils: I

Monday, November 4, 2013
Tampa Convention Center, East Exhibit Hall

Daniel Gary DeBruler1, Stephen H. Schoenholtz2, Brian D. Strahm2, Robert A. Slesak3 and Timothy B. Harrington4, (1)Forest Resources and Environmental Conservation, Virginia Tech, Blacksburg, VA
(2)Virginia Tech, Blacksburg, VA
(3)University of Minnesota, St. Paul, MN
(4)U.S. Forest Service, Olympia, WA
Abstract:
Competing vegetation control and organic matter retention following forest harvesting can change biogeochemical dynamics of soil nutrient pools and potentially change long-term availability of phosphorus. Soil P fractions from pre-harvest samples and samples obtained ten years after replanting were compared under two different competing vegetation control (initial herbicide application only vs. annual herbicide application) and two organic matter-retention treatments (bole-only vs. whole-tree logging) in two Douglas-fir stands of the Pacific Northwest. Results and implications for long-term soil productivity of managed silvicultural systems in the Pacific Northwest will be discussed.

See more from this Division: SSSA Division: Forest, Range & Wildland Soils
See more from this Session: General Forest, Range & Wildland Soils: I