黑龙江省棕色针叶林土类系统分类研究

RESEARCH OF THE SYSTEMATIC CIASSFICATON OF BROWN CONIFEROUS FOREST SOIL IN HEILONGJIANG PROVINCE

棕色针叶林土在黑龙江省分布面积较小，仅分布在大兴岭北端。这类土壤是在寒温带冷湿，针叶林强酸性、中低山条件下新产生的有机酸螯合淋溶与淀积作用而形成的，并使土壤矿物遭到破坏，重新分配，形成ＳｉＯ２富集的灰化层和Ｆｅ、Ａｌ、Ｃ淀积的灰化淀积层；形成草毡状腐殖质素层，同时发生半泥炭化腐殖质积累过程。将发生分类的棕色针叶林土，在系统分类中依据诊断层与诊断特征划分为灰土纲与淋溶土纲。

The brown coniferous forest soil,which were formed under the strong acid condition of cool temperate coniferous forest zone of the lower montain areas and effected by the cheluviationand horizon of the organic acid,distrabuted only in the north part of Da DaXingan Range-a relatively small area of Heilongjiang province.The minerals of the soil were damaged and reallocated,as the result,the podzolic horizon enriched by SiO 2and the spodic horizon accumulted by Fe,Al C.At the sametime,theaccumulation process of the semi-peat hunus had taken place.So we determine the brown coniferous forestsoil to be the podosls order and luvisols order by means of the diagnostic horizon and diagnostic characters of the systematic category.