摘 要 ：对马尾松(Pinus massoniana)人工林内N、P、K、Ca、Mg 5种养分元素的含量、积累、分配和生物循环以及它们随林分年龄的变化趋势进行了研究。结果表明：针叶的养分含量最高，树干材的养分含量最低，凋落物的养分含量与树枝或树皮的养分含量接近，土壤中K、Mg元素丰富，N、P、Ca 3种元素亏缺。树叶、树枝、树皮和树根中各元素含量大小顺序为K>N>Ca>Mg>P，树干材中则是Ca>K>N>Mg>P，5种元素含量随马尾松林分年龄的增加呈逐渐减少的趋势。5种元素贮存总量为460.19～1950.32 k
Abstract:The concentrations, accumulation, distribution and biological cycling of 5 nutrient elements (N, P, K, Ca, Mg) in Pinus massoniana stands of different age classes were studied. The results show that nutrient concentrations were the highest in needles and