In order to get higher accuracy of amplitude measurement and suppress the respiration interference of the photoelectric pulse wave,the original pulse wave signal was processed by the characteristic parameter reconstruction based on the coherent averaging method combined with the wavelet analysis.

Stem respiration of Pinus koraiensis in Changbai Mountains.;

By using soil respiration chamber,the stem respiration of dominant tree species Pinus koraiensis,Quercus mongolica,Fraxinus mandshurica and Tilia amurensis in broad-leaved Korean pine mixed forest of Changbai Mountains was measured from April to October 2003.

Our objective was to investigate the characteristics of stem respiration and the response of stem respiration to temperature in 11 common trees in Xishuangb.