乌拉山自然保护区不同森林群落土壤化学性质的比较研究

对乌拉山自然保护区的3个森林类型(天然油松林、人工油松林、白桦林)不同层次(O～5 cm,5～10cm,10～20 cm,20～40 cm)土壤的化学性质进行了测定、分析与对比.结果表明:(1)不同森林类型土壤化学性质存在明显的差异.土壤有机质、全N、全P含量在不同森林类型下表现出相对一致的规律,即其含量大小顺序为:白...

Comparison on Soil Chemical Properties of Different Forest Types in Wulashan Nature Reserve,Inner Mongolia

Soil chemical properties in three forest types（natural pine forests,artificial pine forests,birch forests） at different levels（0~5 cm,5~10 cm,10~20 cm,20~40 cm） in Wulashan Nature Reserve were determined,analyzed and compared.The results showed：（1） There were obvious differences in soil chemical properties among different forest types.The contents of soil organic matter,total N and total P in different forest types showed the relatively consistent law,namely birch forests﹥artificial pine forests﹥natural pine forests,so reversely the pH value was.And the contents of the soil total K was as the following order： birch forests﹥natural pine forests﹥artificial pine forests.（2） Different levels of soil chemical properties were also obviously different,not only in the same forest types but also in the different types.Along with the increase of soil depth,soil organic matter,total N and total P content decrease,but pH value increases,while the content of total K was closer in different soil layer.