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本文测定并分析了海南尖峰岭地区３０年生的热带乡土树种海南木莲人工林生物量及其估算模型，论述了生物量及其养分分配规律。指出：海南木莲各器官及整株生物量模型以幂函数模型Ｗ＝ａ（Ｄ２Ｈ）ｂ比较理想；全林分的总生物量为１４４．０６６ｔ／ｈｍ２，其中地上部分生物量８９．９３５ｔ／ｈｍ２。乔木层生物量占７８．８１％，林下植物层占２１．１９％；在乔木层中，树干、树叶、树枝、树皮和树根所占的比例分别是５４．１２７％、２．３５４％、７．７６２％、９．３７０％和２６．３８８％；乔木层中，各器官的养分含量，除Ｃａ外，都是叶比其它器官（枝、皮、干、根）的养分含量高许多，Ｎ、Ｐ、Ｋ、Ｃａ、Ｍｇ５个常量养分元素在海南木莲人工林生物体中的总贮量分别为５５７．７５４，２４．３３０，５９９．９０８，２７５．５５７，６４．１０３ｋｇ／ｈｍ２，各养分贮量在各器官中分布，除Ｐ外，从小到大为树叶、树枝、树皮、树干、树根
This paper measured and analyzed the biomass and its estimation model of the 30 years-old tropical native tree species Manglietia plantaris in Jianfengling, Hainan Province, and discussed the biomass and nutrient allocation rules. The results showed that biomass and biomass of all organs and whole plant of Magnolia biondii in Hainan Province were idealized by the power function model W = a (D2H) b. The total biomass of whole plantation was 144.066 t / hm2, of which the aboveground biomass was 89.935 t / hm2. The biomass of arbor layer accounted for 78.81%, and the layer of understory plant accounted for 21.19%. In tree layer, the proportion of tree trunk, leaves, branches, bark and tree roots were 54.127% and 2.354 %, 7.762%, 9.370% and 26.388%, respectively. In the arbor layer, the nutrient content of all organs except Ca was higher than that of other organs (branches, bark, stem and root) Many of the five N, P, K, Ca, Mg total nutrient elements in the M. mandshurica plantation biomass were 557.754,24.330,599.908,275.557,64.103kg / hm2, the nutrients stored in various organs, except P, from small to large leaves, branches, bark, tree trunks, roots