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Nitrogen Mineralization and Uptake from Douglas‐Fir Forest Floors
Author(s) -
Youngberg C. T.
Publication year - 1978
Publication title -
soil science society of america journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.836
H-Index - 168
eISSN - 1435-0661
pISSN - 0361-5995
DOI - 10.2136/sssaj1978.03615995004200030025x
Subject(s) - douglas fir , understory , forest floor , nitrogen , mineralization (soil science) , environmental science , forestry , greenhouse , nitrogen cycle , agronomy , botany , biology , chemistry , geography , soil science , soil water , canopy , organic chemistry
Many different plant species grow in the understory in association with Douglas‐fir [ Pseudotsuga menziesii (Mirb.) Franco]. The nature of the forest floor that accumulates in a Douglas‐fir forest is influenced by these associated species. Nitrogen uptake from forest floor materials developed under nine commonly occurring stand understory conditions was evaluated in a greenhouse experiment with Douglas‐fir seedlings. The net mobilization of N as measured by the uptake of N by two successive crops of Douglas‐fir seedlings ranged for 0.34 to 9.89% of the amount added as organic matter. Net N mobilization was related only partially to total N content of the material.