祁连山东段青海云杉林土壤理化特性研究

采集祁连山东段青海云杉林林地0—10cm,10—20cm和20—40cm土层的土壤剖面样品,测定分析了其土壤物理性质、土壤水分状况、土壤全量养分和有机质含量。结果表明,不同土层的土壤容重值均低于1.00g/cm3,且随土层深度的增加呈增加趋势;土壤总孔隙度的变化规律和土壤容重的变化规律相似,不同土层的总孔隙度均在63%以上,通气状况良好;土壤水分含量随深度的增加呈减小趋势,不同土层土壤平均质量含水量最低为18.7%;土壤有机质和土壤全氮含量都达到养分1级;土壤全钾贮量级别为养分2级;土壤全磷含量缺乏,养分级别为4级或5级;土壤pH均值为7.5,表明林地土壤为中性土壤。建议继续加强祁连山东段青海云杉森林生态系统的有效保护和管理。

Soil Physicochemical Properties of Picea Crassifolia Forest in Eastern Qilian Mountains

Soil samples from soil layers of 0-10 cm,10-20 cm and 20-40 cm in Picea crassifolia forest were collected,and the soil physical properties,soil moisture content and soil nutrient was analyzed and determined for these soil samples.The results showed that the soil bulk density values from different soil layer were all below 1.00 g/cm³,but increased with the depth;Soil porosity showed the same trend,and the soil porosity of different soil layers were above 63% percent,indicating a good ventilation.With the depth,the soil water content decreased,with a lowest value of 18.7%.Soil organic matter and soil total nitrogen content have reached extremely high levels,soil nutrient level was marked as grade 1;Total potassium level belonged to level 2;The total phosphorus was deficiency and belong to level 4 or 5;Mean soil pH is 7.5.Suggestions were made to strengthen the effective protection and management of Picea crassifolia forest ecological system in the eastern Qilian Mountains.