Zhifanggou watershed of typical erosion environment was regarded as a study area and the soil samples of planting orchard and building terrace were viewed as the objects.The interchangeable space-time method was adopted and a slope cropland was selected as a contrast.Several indexes were analyzed such as TOC

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and the evolution characteristics of carbon management index in the period of ecological restoration.The study indicates that the content of soil carbon for each group of soil samples was increased drastically with the increase in the time of conservation by building terrace.The carbon index and the carbon management index were increased steadily.The increasing range of the carbon index tended to balance and the carbon management index was declined gradually.Apparently

the content of soil carbon for each group of soil samples is increased by planting orchard.Soil management has been improved and soil quality has developed in a sound way.Moreover

correlation analysis shows that soil fertility factors have intimate relations to TOC

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carbon index

and carbon management index.The five indexes may be regarded as the indexes reflecting the evolvement of soil quality in the period of ecological restoration.