九寨沟不同受损林地土壤特征研究

Research on Soil Characteristics of Different Damaged Woodlands in Jiuzhaigou County

为了探索九寨沟地震不同受损林地土壤理化特征分布情况,进一步提高受损栖息地林草植被快速恢复模式的合理性,根据研究区震损程度,分析了各样地土壤理化性质。结果表明:土壤容重随震损程度增强呈先减小再增大的趋势;有效磷和铵态氮含量随震损程度增加而升高,而速效钾和硝态氮含量降低。因此,应根据不同震损地块的土壤理化性质进行有针对性的土壤改良,提高林草植被恢复速度,增强各种恢复模式的土壤肥力支撑条件。

In order to explore the distribution situations of physical and chemical characteristics of different woodlands damaged in Jiuzhaigou earthquake and further improve the rationality of the rapid restoration model of forest-grass vegetation in the damaged habitat,the soil physical and chemical properties of different plots were analyzed according to the degree of earthquake damage in the study area.The results showed that:(1)The soil bulk density first decreased and then increased with the increasing degree of earthquake damage.(2)The contents of available phosphorus and ammonia nitrogen are positively correlated with the degree of earthquake damage,while the contents of available potassium and nitrate nitrogen showed the opposite pattern.Therefore,targeted soil improvement should be carried out according to the soil physical and chemical properties of different earthquake-damaged plots,in order to improve the recovery speed of forest-grass vegetation restoration,and enhance the supporting conditions of soil fertility in various restoration models.