Soil Respiration in Drying of an Organic Soil

Zofia Fischer¹, Pavel Blažka^2*

¹Department of Biotechnology and Environment, John Paul II, Catholic University of Lublin, Lublin, Poland.
²Department of Science, University of South Bohemia, Ceské Budějovice, Czech.

DOI: 10.4236/ojss.2015.59018                

Abstract

Drying of soil was linearly related to time, soil volume decreased and ratio of air within the soils increased. Respiration was related with decreasing humidity, storage of CO₂ in soil water results in RQ < 0.5 in the larger soil items at least for a while. Rate of drying decreased in the second part of the process. RQ increased as the CO₂ stored was aerated when its solvent-water evaporated and access of air into the soil increased; eventually RQ = 1.0 in the last days of the experiment. Respiration of the experimental soil stopped when GWC reached 0.15. ΣRQ for the whole process is about 0.7, a bit higher in experiments with less soil suggesting less anoxia.

Keywords

RQ, Anoxia, Storage of CO2, Changes of Soil Volume

Conflicts of Interest

The authors declare no conflicts of interest.

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