沼泽地低位泥炭土壤和旱地土壤活性有机碳与土壤营养成分的关系

Relationship between Active Organic Carbon and Soil Nutrients in Wetland Low-set Peat Soil and Upland Soil

本文以沼泽地泥炭土和旱地土为研究对象,利用高锰酸钾氧化法和紫外分光光度计于565 nm比色测定,分析沼泽地泥炭土与旱地土壤的活性有机碳含量,研究不同土壤的保存方式和营养成分对活性有机碳的影响。结果表明,同一地点泥炭土随着土壤深度加深,营养成分含量(全氮、全磷、有效磷、全钾、速效钾)、总有机碳含量和活性有机碳含量逐步降低。泥炭土活性有机碳量高于旱地土壤的活性有机碳量,土壤活性有机碳与全钾、速效钾和总有机碳呈显著正相关,与pH值呈显著负相关,与全氮、全磷和有效磷差异不显著。

In this paper wetland peat soil and upland soil were studied to analyze their active organic carbon contents and study theeffects of different soil-preserving methods and soil nutrients on active organic carbon contents using potassium permanganate oxidationmethod and UV photometer with 565 nm colorimetric determination. The results showed that along with the increase of the soil depth atthe same place, the contents of the nutrients （total nitrogen, total phosphorus, available phosphorus, total potassium and availablepotassium）, total organic carbon and active organic carbon decreased gradually. The content of organic carbon in peat soil was higherthan that in upland soil. The active organic carbon had significant positive correlation with the total potassium, available potassium andtotal organic carbon, it had negative correlation with pH value and no significant correlation with total nitrogen, total phosphorus andavailable phosphorus.