HJA newt logoHJ Andrews
Login Donate
 
 
  Home > Publications > Search Bibliography > Publication Abstract

Publication Title:   Nitrogen accretion and availability in some snowbrush ecosystems

Year:  1982     Status:  Published     Publication Type:  Journal Article

H. J. Andrews Publication Number:  633

Citation:  Binkley, Dan; Cromack, Kermit Jr.; Fredriksen, Richard L. 1982. Nitrogen accretion and availability in some snowbrush ecosystems. Forest Science. 28(4): 720-724.

Online PDF:  http://andrewsforest.oregonstate.edu/pubs/pdf/pub633.pdf

Abstract:  ABSTRACT. We examined two chronosequences in the Oregon Cascade Mountains to assessnitrogen accretion and availability in relation to snowbrush (Ceanothus •elutinus Dougl.). In two12-year-old snowbrush ecosystems, total soil nitrogen to 30-cm depth exceeded levels in adjacentold-growth stands by 500 and 570 kg has-'. Inclusion of the approximate nitrogen content ofaboveground snowbrush and forest floor biomass raised the estimate of nitrogen fixation to 94to 100 kg ha-' yr-' over 12 years. Snowbrush also increased the availability index of soil nitrogen.but nitrogen availability appeared high in all ecosystems. We speculate that nitrogen fixation bysnowbrush during early succession in these ecosystems has been sufficient to prevent nitrogenlimitation throughout the entire successional sequence. The presence of snowbrush for 12 yearsalso increased soil carbon 40 and 60 percent in the two chronosequences. FOREST Sci. 28:720-724. ADDITIONAL KEY WORDS. Ceanothus rehainus, nitrogen fixation, forest soil fertility, carbon.

Personnel and Keyword Links

Author Links
Binkley ,  Dan  
Cromack Jr. ,  Kermit  
Fredriksen ,  Richard   L.


Theme
Carbon
Forest ecosystems
Forest soil fertility
N-fixation
Nitrogen
Nitrogen dynamics
Nitrogen fixation
Nutrient cycling
Nutrients
Soils

Taxa
Ceanothus velutinus