alexa Forest Management Influence on the Carbon Flux of Cupressus lusitanica Plantation in the Munessa Forest, Ethiopia | OMICS International | Abstract
ISSN: 2168-9776

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Research Article

Forest Management Influence on the Carbon Flux of Cupressus lusitanica Plantation in the Munessa Forest, Ethiopia

Yonas Yohannes1*, Olga Shibistova2,3, Zeleke Asaye4 and Georg Guggenberger2

1Wolkite University, Wolkite, P. O. Box 07, Wolkite, Ethiopia

2Institute of Soil Science, Leibniz Universität Hannover, Herrenhäuser Str. 2, 30419 Hannover, Germany

3VN Sukachev Institute of Forest, SB-RAS, Akademgorodok, 660036 Krasnoyarsk, Russian Federation

4Adami Tulu Agricultural Research Center, Oromia Agricultural Research Institute, P.O.Box:35, Zeway, Ethiopia

*Corresponding Author:
Yonas Yohannes
Wolkite University
Wolkite, P.O. Box 07
Wolkite, Ethiopia
Tel: +251911638127
Fax: +251116460345
E-mail:
[email protected]

Received Date: May 15, 2013; Accepted Date: July 18, 2013; Published Date: July 24, 2013

Citation: Yohannes Y, Shibistova O, Asaye Z, Guggenberger G (2013) Forest Management Influence on the Carbon Flux of Cupressus lusitanica Plantation in the Munessa Forest, Ethiopia. Forest Res 2:111. doi: 10.4172/2168-9776.1000111

Copyright: © 2013 Yohannes Y, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

Abstract

The effect of plantation forests on the global carbon balance is controversially discussed in recent times. As soil respiration is a decisive component in the carbon exchange between terrestrial ecosystems and atmosphere, effects of forest management measures (e.g. thinning) in the context of driving parameters of soil CO2 efflux is a key issue in optimizing carbon friendly land management. In the present study, we report the effects of thinning, soil temperature and soil moisture, and biotic parameters on soil CO2 efflux rate. Soil CO2 efflux was measured by using an Infrared Gas Analyzer. We selected thinned and un-thinned stands within six years old Cupressus lusitanica plantation forest. Soil respiration rate ranged from 1.47 to 6.92 µmol m-2s-1 (thinned) and 1.31 to 5.20 µmol m-2s-1 (control stand).
Generally higher soil respiration rates were measured during wet than in dry season. Seasonal variability of soil CO2 efflux was significantly (p<0.05) correlated with soil moisture, but poorly correlated with soil temperature. Soil respiration increased with increasing soil moisture and reached maximum at 31% but after this threshold it start to decline. In general, soil CO2 efflux rate in the first and second year after thinning was 24% and 14% higher in the thinned stand. Increased soil temperature at the thinned stand contributed minor to the larger soil CO2 efflux, the more important reason appeared to be the trees’ direct response. Higher fine root production together with larger microbial concentrations representing different groups infers a higher autotrophic respiration by roots and associated mycorrhizal fungi as well as by heterotrophic respiration. Despite the higher CO2 losses with soil respiration, the
organic C and total N concentrations in soil rather tended to increase, indicating higher organic matter input to soil at the thinned stand.

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