Soil respiration in shrub willow (Salix x dasyclados) biomass crop increased on the third year after removal
by Miraç Aydın; Renato S. Pacaldo; Timothy A. Volk
International Journal of Global Warming (IJGW), Vol. 15, No. 1, 2018

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 (F_c) rates after its termination. We examined the F_c 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 F_c 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, F_c rates significantly increased in the third year (p = 0.01). Annual cumulative F_c ratios at different seasons were 52% for summer, 26% for fall, 16% for spring, and 6% for winter.

Online publication date: Tue, 22-May-2018

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