Title: Effects of Topographies and Land Use on Spatial Distribution of Surface Soil Organic Carbon in Hilly Region of the Loess Plateau
Abstract: It is important to accurately assess regional spatial distribution and variation of soil organic carbon and to study effects of topographies and land use on spatial distribution of soil surface organic carbon.In Yangou watershed,hilly region of the Loess Plateau,based on three topographies(tableland,slope land,gully land) and eight land uses(farmland,orchard,manmade and secondary grassland,manmade and secondary shrub land and manmade and secondary woodland),314 soil surface(0-20 cm) samples were collected to investigate effects of topographies and land use on spatial distribution of soil organic carbon in the watershed.Topographies and land use significantly(P0.000 1) affect spatial distribution of soil surface organic carbon in Yangou watershed,and their interaction significantly(P=0.051 1) impact on the spatial distribution of soil organic carbon.Under the influence of topographies,the spatial distribution of soil surface organic carbon expressed a changing trend of gully land slope land tableland,and the soil surface organic carbon contents of gully land(8.0 g/kg) and slope land(7.1 g/kg)were as 1.9 and 1.7 times as tableland(4.2 g/kg) respectively.Under the influence of land use,the spatial distribution of soil surface organic carbon performanced for secondary woodlandsecondary shrub landmanmade woodlandsecondary grasslandmanmade shrub landmanmade grassland farmlandorchard.Under the influence of their interaction,soil surface organic carbon of farmland,orchards and grassland were gradually concentrated on gully land under the condition of soil slope erosion.The soil organic carbon contents of gully land of farmland(6.9 g/kg),orchard(8.8 g/kg) and secondary grassland(9.3 g/kg) were as 1.9,2.2 and 1.9 times as tableland respectively.Forests(shrub land and woodland) were different from farmland,orchard and grassland,and reflected that soil surface organic carbon contents of the slope land were much higher than the gully land.The soil organic carbon content of the slope land of secondary woodland(24.6 g/kg) which was 1.5 times of gully land(16.4 g/kg) reached a significant level compared with gully land.
Publication Year: 2010
Publication Date: 2010-01-01
Language: en
Type: article
Access and Citation
Cited By Count: 1
AI Researcher Chatbot
Get quick answers to your questions about the article from our AI researcher chatbot