Periodic Measurements of CO2 Emission Dynamics from Wheat Straw and It’s Biochar Added to Soil S

Abstract

: To investigate the effects of direct incorporation of wheat straw (WS) and its biochar (WB) into loess soil a short-term laboratory incubation experiment was conducted. The purpose was to observe the comparative effects of (WS) and (WB) on carbon mineralization, CO2 emission trends, cumulative production and Carbon C sequestration (Cseq). The (WS) and (WB) were applied four rates each at (0, 5, 10, 15 g/kg soil). The results revealed that wheat straw significantly increased CO2emission rates and cumulative contrary to that biocharproduced from the wheat straw decreased CO2 emissions. Moreover, only 1.3% of added Biochar C was respired where as 36% of added wheat straw C was decomposed. Wheat straw had high amount of labile C that enhanced greenhouse gas (GHG-C) and decreased Cseq. In contrast, (WB) had recalcitrant C that is why decreased (GHG-C) and increased Cseq. Therefore, it can be concluded that (WB) was very stable C source and could be better strategy to mitigate GHG-C emissions and sequester C in soils for long-term sustainability