黄河首曲高寒草甸的土壤特征及其对沙化的响应

Soil Characteristics of Alpine Meadow in the First Curved Section of the Yellow River and Its Response to Desertification

通过对黄河首曲高寒草甸土壤进行测度,分析了该区域土壤的理化性质及其对沙化的响应,结果表明:该区土壤有机质、全氮含量高,速效钾含量也较高,速效磷含量低,土壤呈中性或弱碱性,盐分含量较低;土层薄、沙物质丰富的风沙土正处于进一步沙化的过程中,土层薄、母质为砂粒的草甸土也有潜在沙化的可能。因此,必须对已沙化和潜在沙化草地采取相应措施以扭转进一步沙化的趋势,进而促进沙化草地的生态恢复。

The paper analyzed the physicoehemical properties of the regional soil and its response to the desertification through the investigation of alpine meadow soil of the first curve of(he Yellow River.The outcomes show that a) the contents of organic mailer and total nitrogen are high,available potassium is also higher and available phosphorus is low.The soil shows natural or weak alkaline pH and salt content is lower;b) the aeolian soil with thin layer and sand-rich material is in the process of further desertification.The meadow soil of thin layer and parent material for sand also has the possibility of potential desertification.Thus,it should take corresponding measures to reverse the(rend of further desertification and promote ecological restoration of desertified grasslands.