Research on Changes of Soil Organic Carbon and Soil Total Carbon in Abandoned Homestead of Weibei Tableland Area After Land Remediation---Taking Chengcheng County, Weinan City, Shaanxi Province, China as an example

Abstract

Through sampling and analysis, the changes of soil organic carbon and soil total carbon contents before and after the land consolidation of abandoned residential land in Chengcheng county were compared, and the differences of soil organic carbon and soil total carbon contents between newly added cultivated land and mature cultivated land after the land consolidation were analyzed. The possible reasons for this change was discussed. The result shows that: ①The total soil carbon content of abandoned house sites in the weibei tableland was 18.25g/kg, 17.45g/kg, and 17.51g/kg in three layers of 0-20cm, 20-40cm, and 40-60cm respectively. ②After 10 years of cultivation, the soil in the 0-20cm layer has the highest total carbon content, which is 23.44g/kg. The total carbon content in each layer is 0-20cm>40-60cm>20-40cm. The total carbon content increased by 20-40cm>40-60cm>0-20cm, of which 0-20cm presented a decreasing trend compared with five years ago③The average soil total carbon content of mature cultivated land in Chengcheng county was 20.74g/kg, 28.60 g/kg, and 15.18 g/kg in three soil layers, respectively. Compared with mature cultivated land, the total carbon content of soil in 20-40cm layer had the greatest potential to increase.