摘要
本文研究了N、P、K、Na、Ca、Mg、Cu、Zn、Fe、Mn、B、Mo 12种元素在福建滨海台地的木麻黄林中的积累和循环特征。研究结果表明,植株中元素含量顺序为Ca>Na>N>K>Mg>P>>Mn>Fe>Zn>B>Cu>Mo。这些元素在植株中含量与土壤中的有效态含量之间呈显著正相关,六年生木麻黄林中,Cu、B、Mo、K、Ca、Mg元素在茎中的积累量最大,而在小枝(叶)中,积累量最大的是Fe、N、P、Na;木麻黄对12种元素的富集顺序是Mo>Ca>Na>P>Zn>Cu>Mn>Mg>K>Fe,对Mo的富集系数高达n×10~2,Fe仅为n×10^(-2);这些元素的生物循环强度较大,多数元素每年被植物吸收的量占土壤表层1米厚土层中元素有效态贮量的1～22％,循环量占总吸收量的25～80％。
The authors study the accumulation and cycle characteristics of N, P, K, Na, Ca, Mg, Cu, Zn, Fe, Mn, B, Mo in casuarina equisetifolia trees on Fujian coastal platform. The result shows that the order of the content of these elements in the plant is Ca>Na>N>K>Mg>P>>Mn>Fe>Zn>B>Cu>Mo, the content of these elements in the plant has marked relation to the content of these clemens in available state in the soil; The accumulation amount of the elements in organs of 6 years old Casuarina equisetifolia shows a complicated situation, the accumulation amount of Cu, B, Mo, K, Ca, Mg in the stems is largest, but the accumulation amount of Fe, N, P, Na in the leaves is largest; The order of biotic accumulation coefficients(BAC) of the elements for Casuarina equisetifolia is as follows Mo>Ca>Na>P>Zn>Cu>Mn>Mg>K>Fe, the BAC for Mo, Fe, K, are n×10~2, n×10^(-2), n×10~0 respectively, the others are n×10~1. The intensity of biotic cycle of these elements is larger, the amount of most elements absorbed by the plant in the year is equal to 1～22% of the element storage of available state in soil layer one meter deep, the amount of biotic cycle of the element is equal to 25～80% of total amount of the element absorbed by the plant.
出处
《福建师范大学学报（自然科学版）》
CAS
CSCD
1992年第4期100-107,共8页
Journal of Fujian Normal University：Natural Science Edition
基金
福建滨海防护林带的水热平衡和生物地球化学循环(福建省自然科学基金)
关键词
木麻黄
生物富集
微量元素
循环
Casuarina equisetifolia, biotic accumulation coefficient, biogeochemical cycle, trace element
