研究了不同林龄马尾松人工林养分特征。结果表明:除了土壤pH值之外,不同林龄土壤理化指标均有显著差异,其中成熟林土壤容重最低为1.16 g/cm³,成熟林土壤含水量、碱解氮和有机质含量最高,分别为167 mg/cm³,20.17%和19.38 g/kg;近熟林土壤速效磷、速效钾、全氮、全磷、全钾含量最高,分别为18.01 mg/cm³,67.86 mg/cm³,1.33 g/kg,0.67 g/kg和28.18 g/kg;不同肥力指标之间存在显著相关关系;根据研究结果计算,不同林龄马尾松人工林土壤肥力由高到低为近熟林﹥成熟林﹥中龄林﹥幼龄林。

The nutrient characteristics were studied in view of different aged Pinus massoniana plantations.The results showed that the physicochemical indexes were significantly different at different ages in addition to the pH value of soil.The soil bulk density is the lowest for 1.16 g/cm³ in the mature forest soil,but the water content,available nitrogen and organic matter content of the mature forest soil are the highest,respectively 167 mg/cm³ and 20.17% and 19.38 g/kg;The soil available phosphorus,available potassium,total nitrogen,total phosphorus,total potassium content of near mature forest are the highest,respectively 18.01 mg/cm³,67.86 mg/cm³,1.33 g/kg,0.67 g/kg and 28.18 g/kg;There is a significant relationship between different fertility indexes;According to the calculation results,soil fertility of different aged Pinus massoniana plantations is in such an order from high to low as near mature forest>mature forest>middle age forest>the young forest.