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- W2353471517 abstract "Calcareous soil is a kind of non-zonal soil,distributed in mountainous karst area in subtropical region of China. Guizhou province is located in the center of karst area of Southwest China, and is the largest karst unit in the world. Over last one or two decades soil erosion and land rocky desertification have become more and more serious in the karst area,resulting in great difficulties for the survival of several ten million inhabitants in these regions. This paper analyzed the geological causes of calcareous soil erosion and land rocky desertification.The analytic results show that the mineralogical and basic physical chemistry characteristic of the soil is not the main factor. The main factors include: (1)the low soil-forming velocity, and thus the small amount of endurable soil losses is the direct cause of land rocky desertification;(2) in the other hand, the unique dualistic structure, fragmentized terrain and physiognomy in karst area provide the potential energy of erosion and leave space for erosion material deposition;(3)The surface soil contains a majority of organic matter and nutrient of soil body. If erosion happened and surface soil was eroded, soil structure and characteristic would degrade quickly. (4) The absence of weathering mother-soil between soil and rocks makes calcareous soil unstable. Soil erosion at the rock-soil interface is a distinct character. These are the main geological causes of calcareous soil erosion and land rocky desertification." @default.
- W2353471517 created "2016-06-24" @default.
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- W2353471517 date "2002-01-01" @default.
- W2353471517 modified "2023-09-24" @default.
- W2353471517 title "GEOLOGICAL CAUSE OF CALCAREOUS SOIL EROSION AND LAND ROCKY DESERTIFICATION IN KARST AREA,GUIZHOU PROVINCE" @default.
- W2353471517 hasPublicationYear "2002" @default.
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