[目的]阐明不同林龄凹叶厚朴群落土壤有机碳动态变化规律及其与氮磷钾的关系.[方法]以4年生、7年生、11年生凹叶厚朴群落为研究对象,分析土壤有机碳、全氮、全磷和全钾含量的变化规律.[结果]凹叶厚朴群落土壤有机碳、全氮和全磷含量均随林龄的增大而减小,而土壤全钾含量变化规律不明显.各群落土壤养分的大小排序为4年生凹叶厚朴>7年生凹叶厚朴>11年生凹叶厚朴.[结论]随林龄的增长,凹叶厚朴群落土壤有机碳和肥力水平降低,可对中高林龄的凹叶厚朴群落增施有机肥等提高土壤肥力水平.%[Objective] The aim was to reveal the relationships among soil organic carbon and N、P、K distribution characteristics of different-aged Magnolia officinalis communities. [Mehod] We took the 4,7 and 11 years Magnolia officinalis communities as the research object, ana-lyzed the distribution characteristics of the soil organic carbon and total nitrogen,total phosphorous and total potassium. [ Result] The soil or-ganic carbon, total nitrogen and total phosphorus of different-aged Magnolia officinalis communities were shown as the growth of the stand age and gradually reduce the trend. The order was as following:4 years Magnolia officinalis > 7 years Magnolia officinalis > 11 years Magnolia officinalis. [ Conclusion] Along with the growth of the stand age, the soil organic carbon and fertility levels of Magnolia officinalis tend to de-crease. We can improve the fertility levels by increasing organic manure fertilizer application.
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