汶川地震极重灾区灾后十年受损土壤生态恢复状况研究

Study on Ecological Restoration Status of Damaged Soil in the Severest Disaster Area Ten Years after Wenchuan Earthquake

选取汶川地震极重灾区10个县(市、区)22个受损点位和对照点位土壤进行3次跟踪监测。结果表明:2011到2018年7年间,受损点的土壤结构、土壤有机质还没有得到很好地恢复,土壤水分涵养能力也低于对照点位。受损点位土壤有效氮、有效磷、有效钾总体呈下降趋势;80%县(市、区)受损点位土壤有机质、有效氮低于对照点位;60%县(市、区)受损点位土壤有效磷低于对照点位;70%县(市、区)受损点位土壤有效钾低于对照点位。

Twenty-two damaged sites and control sites in 10 counties(cities,districts)in the severest disaster area of Wenchuan earthquake were selected for 3 times of tracking and monitoring.The results showed that during the 7 years from 2011 to 2018,the soil structure and soil organic matter of the damaged sites had not been well recovered,and the soil water conservation capacity was also lower than that of the control sites.The content of soil available nitrogen,available phosphorus and available potassium in the damaged sites showed a downward trend.The soil organic matter and available nitrogen in the damaged sites were lower than the control sites in 80%of the counties(cities,districts).The soil available phosphorus in the damage sites was lower than the control sites in 60%of the counties(cities,districts).The soil available potassium in the damage sites was lower than the control sites in 70%counties(cities,districts).