亚热带白云岩喀斯特地区土壤耕层有机碳与养分的 垂直分布特征.

There have been many studies on the vertical distribution of organic carbon and nutrients in the soil arable layer in non-karst areas and limestone karst areas, but there are rare related studies in dolomite karst areas. In order to explore the vertical distribution characteristics of organic carbon and nutrients in the soil arable layer in the typical dolomite karst area, taking the typical dolomite karst soil arable layer as an example in the east of the Zejiashan in the buffer zone of Shibing World Natural Heritage Site, vertical stratified sampling analysis was used to study Vertical distribution characteristics of organic carbon and nutrients in the soil arable layer. The results showed that the average mass fractions of organic carbon, total nitrogen, total phosphorus, and total potassium in the soil cultivated layer from 0-10 cm, 10-20 cm to 20-30 cm decreased. The organic carbon, total nitrogen, the mass fractions of phosphorus and total potassium gradually decrease with the increase of soil depth; the accumulation characteristics of organic carbon, total nitrogen, total phosphorus, and total [ABSTRACT FROM AUTHOR]