通过野外调查和实验室分析,对马尾松各器官生物量及营养元素含量、积累量和分配进行了研究。结果表明:1)2.5a生和8.5a生马尾松不同器官营养元素总含量大小顺序分别为树叶>树根>树枝>树干、树叶>树枝>树根>树干,各器官营养元素含量大小顺序分别为N>K>Ca>P>Mg>Mn>Fe>B>Zn>Cu和N>Ca>K>Mg>P>Fe>Mn>Zn>B>Cu;2)2.5a生和8.5a生马尾松树体营养元素总积累量分别为180.69,617.46g/株。2.5a生和8.5a生各器官营养元素积累量大小次序分别为树叶>树枝>树干>树根、树干>树枝>树叶>树根。2.5a生和8.5a生马尾松树体各种营养元素积累量大小次序分别为N>Ca>K>P>Mg>Mn>Fe>Zn>B>Cu和N>Ca>K>Mg>P>Fe>Mn>Zn>B>Cu。马尾松幼林不同器官营养元素积累量随林龄增长而增加。树体各营养元素的分配与各器官生物量不成正比例关系。
The content,accumulation and distribution of ten nutrient elements and biomass in different organs of Pinus massoniana were studied based on field investigation and lab analysis.The results show that:1)the order of total concentrations of nutrient elements in different organs of 2.5 and 8.5-year old Pinus massoniana was leaf>root>twig>trunk and leaf>twig>root>trunk.The order of concentrations of nutrient elements in 2.5 and 8.5-year old Pinus massoniana was N>K>Ca>P>Mg>Mn>Fe>B>Zn>Cu and N>Ca>K>Mg>P>Fe>Mn>Zn>B>Cu.2) The total nutrient accumulations at two different age classes plantation were 180.69 and 617.46 g per plant.The order of accumulations of ten nutrient elements in different organs of 2.5 and 8.5-year old Pinus massoniana was leaf>twig>trunk>root and trunk>twig>leaf>root.The order of accumulations of nutrient elements in 2.5 and 8.5-year old Pinus massoniana was N>Ca>K>P>Mg>Mn>Fe>Zn>B>Cu and N>Ca>K>Mg>P>Fe>Mn>Zn>B>Cu.So the concentrations of nutrient elements in different organs of young Pinus massoniana increased with the increase of age,the total accumulations of nutrient elements in leaf and twig of 2.5 year old trees was recorded as the highest,that of the 8.5 year old ones has become the highest in the trunk and twig.The content and accumulation of nutrient elements in different organs of Pinus massoniana were different.The distribution of nutrient elements in the tree body is not proportional to the biomass of different organ.
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