兴安落叶松林几种林型土壤氮含量的对比研究

Comparative Studies on Nitrogen Content of Soil in Different Forest Types of Dahurian Larch Forest

文章对大兴安岭兴安落叶松林8种林型土壤数据进行统计分析,结果表明:腐殖质层、淀积层的土壤全氮含量最高的均为泥炭藓-真藓-兴安落叶松林,最低的分别是杜香-兴安落叶松林,范围在1.862～14.090g/kg。腐殖质层与淀积层土壤全氮差异显著。土壤的碱解氮在腐殖质层和淀积层的分布趋势与全氮的分布趋势相似,含量范围在163.667～1056.064mg/kg,两层之间碱解氮的差异也很显著。土壤的碱解氮占全氮的比例较高,范围在6.284%～10.748%。除泥炭藓-真藓-兴安落叶松林和塔头-兴安落叶松林的碱解氮与全氮的相关系数较小外,其他林型则较高。

The statistical analysis is used in the soil data that is from eight different forest types of Dahurian larch forest in Daxinganling, the results are as follow：the highest contents of soil total nitrogen in the lowest is respectively The diversity of soil total on soil available nitrogen in humus horizon and in illuvial horizon is the same as total nitrogen, the range for 163.667-1056.064mg/kg. Between horizons, the soil available nitrogen is obvious also. The soil available nitrogen ratio to total nitrogen is higher, the range for 6.284%-10.748%, The corl＇elation coefficients between the soil available nitrogen and the total nitrogen in Sphagnum-Bryum-L.dahuricaforest and carex tato-L.dahlzrica forest are lower, though the another forests are higher.