Trace Characterization of Wood Species and Grouth Envi onment by Analysing Trace Elements in Wood

用中子活化法和原子吸收光谱法测定了蛇纹石土上生长的赤杨(P.densiflora)、锯缘栎(Q.serrata)和冰草(C.barbinervis)的镁、钙、铬、锰、铁、镍等元素的含量。蛇纹土中酸浸出态镍的含量反映了蛇纹岩土壤中酸浸提态镍的含量。赤松叶中元素含量受蛇纹土的特征含量影响较大。分析了生长在Sb污染土壤上的赤松、魔芋和日本苏木的茎中Sb含量的径向分布。用同样的方法也测定了赤松、龙须布和铃木在铜污染的帆上生长的铜含量。碱金属元素在针叶材、阔叶木和红树林中的径向分布不同，但针叶材(Sugi、赤松和特达松)和阔叶材(Mizunara、kuri和konara)的径向分布非常相似。

Determinations of Mg-, Ca-, Cr-, Mn-, Fe- and Ni-content(P. densiflora), konara(Q. serrata)and ryoubu(C. barbinervis)which were grown on the serpentine soil, were performed by the neutron activation method or the atomic absorption spectrophotometry. It was also found that Hi content in the leaves of konara as well as of ryoubu reflected the concentration of the acid extractable Ni in the serpentine soil. The elemental contents in akamatsu leaf was heavily affected by the characteristic contents of the serpentine soil. It is suggested that these trees are available for the indicator of sail- environment.The radial distributions of Sb content in the stems were analysed for akamatsu, konara and sugi(C. japonica)grown on the Sb-polluted soil. In the same way those of Cu content were also determined for akamatsu, ryoubu and sugi grown an the Cu-polluted sail. It was found that among these woody plants, a sugi stem was available for the Sb-indicator and an akamatsu stem for the Cu-indicator, respectively.The profiles of the radial distribution of alkali metal in softwood, hardwood, and mangrove were different, but, the profiles in softwood(sugi, akamatsu, and todamatsu)and hardwood(mizunara, kuri, and konara)were very similar.