农田土壤有机碳固定机制及其影响因子研究进展

全球气候变暖引起的环境问题已经引起各国政府及科学家的密切关注。农田土壤作为大气CO2的源和库,在全球碳循环中的重要角色日渐被认识。本文围绕土壤固碳的基本问题,总结了农田土壤固碳潜力、土壤有机碳固定机制及其影响因素的国内外研究进展。国内研究表明,目前耕地的地力不稳,土壤有机碳密度较低,农田土壤固碳的潜力较大。因此,加强不同区域农田土壤固碳潜力、固碳过程、固碳机理等方面的研究,设计合理优化的农业管理措施,是今后研究的重点。

Review on the Mechanism of Soil Organic Carbon Sequestration and Its Influence Factors in Cropland Soils

Nowadays the governments and scientists paid more attention to the environmental problems caused by global warming.As the source and sink of atmospheric CO2,the role of the soil carbon in the global carbon cycle was realized gradually.According to the previous researches over the world,the scientific progress was concluded,including the potential capacity and mechanism of soil carbon sequestration,influence factors as well.All research results showed that the cultivated land fertility was unstable;density soil organic carbon was lower.That meant there was big potential to soil carbon sequestration.So further research should be mainly focusing on the potential,process and mechanism of soil carbon sequestration,and then designed the reasonable and optimal agriculture management.