Anaysis Of Terrain Factors In Sugarcanearea Based On DEM

In order to expand the application of terrain factor analysis in the field of agricultural planting and to understand the relationship between site conditions and topographic factors of sugarcane planting,this paper takes Liujiang County as the research area.The terrain factors in Liujiang County are divided into two categories:micro terrain factor and macro terrain factor.The spatial analysis method of GIS is used as the theoretical basis,and the elevation,slope and slope direction are extracted by using ArcGIS software based on the DEM data of Liujiang County.The distribution characteristics of different topographic factors in sugarcane growing area in Liujiang County were analyzed quantitatively by overlaying the topographic factors such as relief degree and roughness of the surface with the land use map of Liujiang County.Except here.In addition,the topographic location index was constructed,and the distribution characteristics of sugarcane growing areas in Liujiang region were analyzed synthetically.Finally,the following main conclusions are drawn:1.The distribution of various topographic factors in Liujiang County has obvious distribution characteristics,such as elevation,surface cutting degree,surface roughness,slope direction and the topographic distribution of Liujiang County,and the distribution of slope direction is more uniform among different areas.There is no obvious difference.The distribution of the coefficient of variation in elevation is relatively large in the transitional zone and relatively small in the plain and hilly area,which also reflects the topographic characteristics of Liujiang County to some extent.2.According to the elevation,slope,direction and topographic position of Liujiang area,the sugarcane planting area in Liujiang area is mainly distributed in hilly areas and gentle sloping areas,and the slope direction distribution is not obvious.Comparatively speaking,the east slope and the south slope with better light and heat conditions are more.There is a strong dependence on topographic position in the sugarcane area of Liujiang area,which indicates that the planting of sugarcane is restricted by the topographic conditions.