Soil organic carbon is one of the most important
soil components, which acts as a sink for atmospheric CO2. This
study focuses on the effect of different methods of organic matter
application on the soil organic carbon sequestration in a 4-month
experiment under controlled greenhouse conditions. Three rates of
straw residue and farmyard manure were added to uncultivated and
cropland soils. Two treatments of straw residue and farmyard manure
incorporation were used into: a soil surface layer and 0-20 cm
soil depth. The result showed that the application of organic matter,
especially the farmyard manure incorporation led to a significant
increase in the final soil organic carbon content. Higher amounts
of soil organic carbon were stored in the cropland soil than in the
uncultivated soil. On average, the soil surface layer treatment
caused a higher sequestration of soil organic carbon compared to
the whole soil depth treatment. If higher rates of organic matter
were added to the soils, lower carbon sequestration was observed
and vice versa. The result indicated that the carbon sequestration
ranged farmyardmanure > strawresidue and cropland soil > uncultivated
soil. The findings of this research revealed the necessity of
paying more attention to the role of organic residue management in
carbon sequestration and prevention of increasing global warming.
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