甘肃省地貌特征对农业可持续发展的影响

The Influence of Geomorphic Characters on Agricultural Sustainable Development in Gansu

在分析甘肃省的地貌特征及其对农业生产的影响的基础上，论述了地貌与土壤侵蚀的关系，并指出坡度大、降水强度大、植被稀疏、地表物质疏松和大风是造成农业生态环境脆弱的主要原因，而人类活动的不合理则使本已脆弱的生态环境更趋恶化．最后，根据甘肃省的地貌格局，提出促进农业生态环境良性发展的根本措施：因地制宜发展与当地生态环境相适应的绿色产业，以确保农业生态环境良性发展；提高农业生产的集约化水平．

In this paper,the direct and indirect effects of geomorphic characters in Gansu on agricultural production are analysed,the relation between geomorphology and natural hazard such as soil erosion are discussed and the important reasons of the weak agricultural ecological environment are pointed out,which are steep slope,heavy rainfall,thin vegetation,soft surface sediment and strong wind.The weak ecological environment is getting bad in view of unrational human activity.According to the geomorphic distribution,it is suggested that the countermeasures to improve the agricultural ecological environment in Gansu are to establish a green shelter system and to promote intensive farming in the whole province.