东北黑土区坡耕地水土流失及防治技术研究进展

Study on Soil and Water Loss and Prevention Technology of Sloping Land in Blackland in the Northeast

东北黑土区是世界上仅有的3大黑土区之一,是我国重要的商品粮基地,对国民经济发展起着十分重要的作用。近几十年来,严重的水土流失已成为制约该区国民经济发展的瓶颈。东北黑土区土壤侵蚀面积达4.47万km2,占全区土地总面积的37.9%。就黑土区水土流失的成因及现状进行分析,利用灰色系统理论,对黑土区土壤的主要物理化学性状进行建模预测,预测出未来黑土区土壤的理化性状的变化趋势,同时论述黑土区水土流失的防治及监测的技术研究进展。

The blacklands in northeast China is one of the only three blacklands in the world and an important bace of commodity grain. Blackland is the very precious land resource in our country. Because blackland in the northeast is an important food producing area,so it plays an important part in the development of national economy. Serious losing of soil and water has become a bottle neck in the development of national economy for recent years. The gross eroded area has reached 74 326.2 km^2. It takes 36. 7% of the total area. The authors mainly analyzed the cause of formation and the status of soil and water loss in blackland, and using the grey system theory to build a model to forecast the rate of the change about physical and chemical of blacksoil. At the same time,the prevention and cure measures and new technology of monitoring soil and water loss on sloping land in blackland are presented.