宣郎广地区土壤侵蚀危险度评价及防治对策

根据野外实地调研及相关图件、文字资料等,建立了研究区的土壤数据库,并在G IS软件及相关模型的支持下,对研究区的土壤侵蚀危险度进行了评价,给出了研究区土壤侵蚀危险度等级、分布及其成因。研究认为,不合理的土地利用方式是造成土壤侵蚀强烈的主要原因,无任何保护措施的旱坡地侵蚀最为严重,是该区水土流失防治的重点。据此提出了调整研究区内农林牧业结构,实行水旱轮作,合理施肥,提高单产,控制人口数量、提高人口质量的防治对策。

Evaluation on Dangerous Degree of Soil Erosion in Xuan-Lang-Guang Region and Countermeasures for Prevention and Control

It establishes soil data bank of the studied region based on field first-hand investigation and related maps and written material, evaluates the dangerous degree of soil erosion of the studied region and presents the grade of dangerous degree, distribution and origin of soil erosion in the studied region with the support of GIS software and correlated models. It considers after study that irrational land utilization is the main causation of severe soil erosion and the soil erosion of sloped land where has no any protective measure is the most severe and should put emphasis on. The paper puts forward the following countermeasures of prevention and control of restructuring agriculture, forestry and animal husbandry, rotation of irrigated and non-irrigated crops, fertilizing rationally, increasing per unit area yield, controlling the population size and increasing the population quality based on the above condition.