林火对长白山自然保护区风灾区土壤性质的影响

以2012年长白山国家级自然保护区西坡风灾区森林火灾为研究背景,采用常规土壤分析方法研究了不同火烧强度下土壤理化性质的变化情况．结果表明：火烧后土壤容重和土壤含水率随火烧强度的增强显著下降;0～6cm土壤pH,土壤有机质,土壤全C、全N、速效P、速效K质量分数经轻度和中度火烧后均呈显著增加趋势;在火烧强度因子的控制下,对各养分质量分数进行的偏相关分析显示,除土壤pH外,其他各养分间存在显著的相关性．

Influences of Forest Fire on Soil Properties in Wind Disaster Area of Changbai Mountain Nature Reserve

This paper aims to provide a theoretical basis for soil quality improvement and plant instauration based on the fire disturbance in wind disaster area of Changbai Mountain Nature Reserve in 2012. Conventional soil analysis methods were applied to study the changes in soil properties after different intensities of fire disturbance. Results showed that the soil bulk density and moisture content decreased significantly with an fire intensity increased. Moreover, soil pH in 0 -6 cm horizon, the contents of organic matter, total carbon, total nitrogen, available phosphorus and available potassium increased as fire intensity increased. The data was assessed by correlation analysis on soil nutrients under the fire intensity controller. There was significant correlation between the soil nutrients beside soil pH.