Analysis of the carbon sequestration function of the upland under the conservation tillage cultivation that introduced molecular structure analysis of the soil organic matter.

点击翻译按钮获取中文摘要

The formation of soil aggregates was remarkable for the farmland under conservation tillage, compared to that under rotary tillage. For conservation tillage, the organic matter(OM) content in soil aggregated was found more in larger aggregated than in smaller ones. Our study showed that the change of functional groups in soil organic matter can be monitored easily by using a reflection type FTIR analyzer. A ratio of aromatic to aliphatic(Ar/Al) functional group determined by FTIR sensitively reflected the change of decomposition of OM more than a ratio of aromatic to amide(Ar/Am) functional group. The soil under conservation tillage had a greater value of Ar/Al than rotary tillage. The greatest Ar/Al value in the surface soil was found under conservation tillage, followed conventional cultivation and rotary tillage(control). Further study is needed to investigate the mechanistic relationship between soil OM functional groups and soil carbon sequestration.