摘要：The terrestrial carbon (C) cycle is a very important part of the global C cycle. Researches have been carried out aimed at reduction of the increasing C emissions and soil salinity that result from intense human activity, in recent years. Organic matter that has been transformed into biochar is more resistant to decomposition and disintegration activity of microorganisms. Therefore, source of organic matter is becoming important in terms of reduction of C emission. The effects of application of sheep manure (SM) and sheep manure biochar (SMBC) on the C dynamics of the calcareous soils with different soil salinity level has been examined in this study. For this aim, soil samples were taken from the Harran Plain and measured by applying different salt concentrations (EC=0, 4, 8, 12 and 16 dS m~(-1)) in laboratory conditions. At the end of the study, amount of CO_2-C flux from the soils was compared with the control group, a reduction was observed in both treatments (SM and SMBC), the greatest reduction being observed in SMBC. While reductions of 15.62% (EC=4 dS m~(-1)), 19.5% (EC=8 dS m~(-1)), 40.15% (EC=12 dS m~(-1)) and 48.43% (EC=16 dS m~(-1)) were observed in samples with SM, the corresponding reductions in samples with SMBC were observed as 21.76%, 52.94%, 58.82% and 67.64% respectively at the end of the first month of the study. As a result, CO_2 efflux was decreased in line with increasing EC values. However, this situation is considered not to be dependent only on the increase in amount of saline in the soil, but at the same time to be related to the biochar added to the soil. When comparing the effect of SM and SMBC treatments to carbon - storage of soil, SMBC resulted in lower carbon emissions. Since SM undergoes a normal process and is mineralized, more CO_2 is released. Therefore, in cases where organic waste is added to soil, converting this to biochar first will be of great importance both for the soil and for atmospheric CO_2.
