生物质炭对土壤性状和作物产量的影响

Effect of Biomass Charcoal on Soil Character and Crop Yield

综述了生物质炭(biomass charcoal)对土壤性状和作物产量的影响。生物质炭化后与木炭相似,耐降解,可提高土壤碳库容量,减少温室气体排放。同时炭具有很大的表面积,持水性、吸附性均较强。在一定量下,施炭可增加土壤阴、阳离子交换量、吸附氮、磷及矿物离子,减少养分损失,在一定范围内,普遍能增加作物生物量和产量,因此认为生物质炭还田是提高土壤肥力、增加碳封存时间的有效途径。

Developing renewable clean biomass energy using widely available biomass is an important step to adjust energy structure,protecting environment and resources.Here we review the effect of biomass charcoal byproduct of biomass energy on soil fertility and crop yield.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.