兴安落叶松林下冻土中锰元素的分布规律研究

Distribution Pattern of Manganese in Permafrost of Larix Gmelinii Forest

通过对我国典型寒温带兴安落叶松林区的原始林、间伐林、原始湿地三种生态系统冻土中锰元素含量以及影响锰元素含量因素的研究,得出以下结论:①三种生态系统冻土中锰元素含量范围为0.33-6.83gkg-1;②对冻土中锰元素含量的影响程度由大到小的因素为土壤层次、生态系统、坡向和坡位;③锰元素含量表层最高,向下含量逐渐减少;④三种生态系统锰元素含量由高到低的顺序为原始林、间伐林、原始湿地,坡中、坡下锰含量高于坡上,阴坡锰含量高于阳坡。

This paper deals with the research on manganese contents and influencing factors in permafrost in three ecological systems, which are a virgin forest, a clear cutting forest and a virgin wetland in Larix Gmelinii forest in the cold temperate zone in China. In the three ecological systems, the range of manganese content was 0.33-6.83g/kg. The factors influencing the content of manganese are soil properties, ecological system, and slope direction and position. In the top soil, the content of manganese is more than in the bottom. The order for the content of manganese from high to low in the three systems is the virgin forest, the clear cutting forest and the virgin wetland. The content of manganese on the top and middle slope is higher than that on the bottom slope. And the content of manganese on the northern slope is higher than on the southern slope.