Abstract:

Abstract : Total crop residue in China is about 600 million tons every year. Crop residue incorporation has increased crop yield and soil quality. However, there are two main problems, one is residue is difficult to rot under field conditions, which effect next cultivation. The other is field capacity for residue is limit. Therefore, biomass charcoal can be a good choice. Biomass charcoal has a high surface area, high nutrient retention capacity and high water retention capacity due to its porous structure. Transformation of crop residue into stable C pools (black carbon) can reduce the release of the greenhouse gas CO2 into the atmosphere and can increase C sequestration in the soil. Black carbon is also a soil conditioner which increases the CEC, nutrient availability, decreases nutrient leaching and provides more space for microbe. Adding black carbon to soil can significantly increase seed germination, plant growth, and crop yields.