Title: Soil respiration in shrub willow (Salix x dasyclados) biomass crop increased on the third year after removal

Authors: Miraç Aydın; Renato S. Pacaldo; Timothy A. Volk

Addresses: Faculty of Forestry, Watershed Management Department, Kastamonu University, 37100 Kastamonu, Turkey ' College of Forestry and Environmental Studies, Mindanao State University, 9700 Marawi City, Philippines ' Department of Forest and Natural Resources Management, College of Environmental Science and Forestry, State University of New York, 1 Forestry Drive, Syracuse, 13210 New York, USA

Abstract: The SWBC production system is not only a source of renewable energy, but also a carbon sink. However, one of the uncertainties in the greenhouse gas potential analysis of this system is soil CO2 efflux (Fc) rates after its termination. We examined the Fc rates for three years and determined the total CO2 production of SWBC fields following the termination and removal of SWBC fields. Four current SWBC fields of 5-, 12-, 14-, and 19-years old were used as sampling plots. The mean Fc rates did not differ statistically between ages (p = 0.66), and there was no significant interaction effect between age and year (p = 0.94). However, Fc rates significantly increased in the third year (p = 0.01). Annual cumulative Fc ratios at different seasons were 52% for summer, 26% for fall, 16% for spring, and 6% for winter.

Keywords: carbon sequestration; dedicated bioenergy crops; soil moisture; soil organic carbon; soil temperature.

DOI: 10.1504/IJGW.2018.091953

International Journal of Global Warming, 2018 Vol.15 No.1, pp.54 - 66

Available online: 18 May 2018 *

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