摘要：In order to study the temporal and spatial variation characteristics of soil organic matter in a small Karst Basin,which provided a scientific basis for estimating soil organic matter reserves and selecting measures for soil carbon sequestration and accumulation in a karst region.Based on field sampling,laboratory measurement,geostatistics and GIS,the temporal and spatial variability of soil organic matter and its influencing factors during the past 1980-2015 years were studied.The results showed that in '980s,the average content of organic matter in soil samples was 37.89 g/kg,and the average content of soil organic matter was 43.22 g/kg in 2015.From 1980 to 2015,the average content of soil organic matter increased by 5.33 g/kg,with an increase of 14.07 %.35 years to reduce structural characteristics of soil organic matter in the region decreased,correlation,spatial distribution tends to be broken,two periods of soil organic matter was greater than the East West,middle,West,North South High low trend,but local variability,a mosaic,mass distribution.
关键词：Soil organic matter;Karst;spatial and temporal release;main controlling factors;small basin
