不同母岩发育土壤的可氧化态有机碳

Oxidizable organic carbon in soils originated from different parent rocks

采用KMnO4氧化法测定了8种不同母岩发育形成的土壤的可氧化态有机碳含量,结果表明,发育母岩不同,土壤可氧化态有机碳含量显著不同。通过对土壤养分、土壤颗粒组成、容重与可氧化态有机碳含量的相关性分析表明,土壤可氧化态有机碳与土壤的速效磷、全氮、速效钾、砂粒、粉粒的含量存在着极显著负相关关系;与土壤容重存在着极显著的正相关关系;与土壤的有机质、碱解氮、粗砂、细砂、粘粒、pH值、石砾含量无相关关系。

By using KMnO4-oxidation method, this paper determined the oxidizable organic carbon content in soils originated from eight parent rocks. The results showed that the content of soil oxidizable organic carbon differed significantly with different parent rocks. Soil oxidizable organic carbon had a significant negative correlation with soil available phosphorus, total nitrogen, available potassium, sand, and silt, a significant positive correlation with soil hulk density, and no relationship with soil organic matter, available nitrogen, pH, coarse sand, fine sand, clay, and gravel.