Abstract

Authors

Dannoura, M., Kominami, Y., Hirano, Y., Kanazawa, Y., Goto, Y.

Year

2005

Title

Measurement of root respiration using potted Japanese cedar,

Journal

Grad.School Sci.&Technol, Kobe Univ.

Volume

23(A)

Page

67-73

DOI

-

Keywords

root respiration, potted Japanese cedar, CO2 flux, closed-chamber method

URL

-

Abstract

In order to verify the influence of disturbance by root sampling on measurement of root respiration, we measured underground respiration rate of potted Japanese cedar (Cryptomeria japonica) cultivated using beads instead of soil before and after digging. The proportion of root respiration rate in the respiration rate of total plant body was estimated by under-and above- ground respiration measurements. Root respiration rate was measured by closed-chamber method using IRGA (model 800, LI-COR). Two measurements were conducted. First, CO2 flux from the potted part where respiration was expected to be composed only of root respiration was measured. Next, CO2 flux of root after removal from the pot was measured. Root respiration after digging was higher than that before digging. Root respiration before digging was 2.775~10-5 (mgCO2 g-1 s-1) and the increase rate was insignificant (about 7% on average). The results suggested that it is possible to measure root respiration using sampling method if it is done carefully.

Site

YMS

Remarks

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