不同干扰类型下的白桦次生林土壤理化性质研究

研究内蒙古大兴安岭地区不同干扰类型下白桦次生林土壤理化性质特征，在内蒙古根河市选取3种干扰类型的白桦次生林样地的不同土层土壤作为研究对象，对土壤理化性质进行测量分析，探究不同干扰类型对土壤理化性质的影响。研究结果表明，白桦次生林在不同干扰方式下土壤理化性质存在显著差异。其中人工条带改造后的白桦次生林土壤pH值增大，火烧后白桦次生林容重增大，土壤有机碳、全氮、全磷、全钾、速效磷、速效钾含量在人工条带改造后显著增高，采伐干扰样地白桦次生林样地土壤含水量、速效氮含量最高。不同干扰类型的白桦次生林样地土壤理化性质间相关性不同。人工条带改造干扰样地白桦次生林土壤综合指数较高，火干扰样地白桦次生林土壤综合指数较低。

Soil Physical and Chemical Properties of Betula platyphylla Secondary Forest under Different Disturbance Types

To study soil physical and chemical properties of Betula platyphylla secondary forest under different disturbance types in the Greater Khingan Mountains of Inner Mongolia, this paper selected different soil layers of three disturbance types in sample plots of Genhe City, tested and analyzed the soil physical and chemical properties, and explored the impact of different disturbances on soil physical and chemical properties. The results showed that the soil physical and chemical properties of Betula platyphylla secondary forest were significantly different under different disturbance types. The mean value of soil pH value in the secondary forest disturbed by artificial strip transformation increased, the bulk density of the secondary forest disturbed by fire increased, the content of soil organic carbon, total nitrogen, total phosphorus, total potassium, available phosphorus, and available potassium increased significantly disturbed by artificial strip transformation, and the soil water content and available nitrogen content disturbed by logging were the highest. The correlation of soil physical and chemical properties of Betula platyphylla secondary forest under different disturbance types was different. The soil comprehensive index of the secondary forest disturbed by the artificial strip transformation was higher, while that disturbed by fire was lower.