西藏色季拉山冷杉林生态系统养分的淋溶输出研究  

A Study on Eluviation Outputs of Nutrients of Abies georgei Forest Ecosystem of Mount Sejila in Tibet

作　　者：辛学兵[1] 王景生[2] 翟明普[1] 

机构地区：[1]北京林业大学资源与环境学院 [2]西藏农牧学院高原生态研究所,西藏林芝860000

出　　处：《林业科学研究》2004年第1期6-11,共6页Forest Research

基　　金：中国林科院院"西藏冷杉林生态系统养分循环研究"资助

摘　　要：西藏色季拉山冷杉林生态系统中土壤地表水和土壤渗漏水中离子和元素的输出量占降水养分输入量的比重很小,均不超过1%。地表枯落物和土壤中的SO2-4、HCO-3、N被淋溶;K、Zn、P被吸附;土壤总的淋溶量从大到小的顺序为:SO2-4>Cl->HCO-3>C>Mg>N>Ca>Fe>Na>Zn>P>K;土壤总的淋溶系数显示的次序为HCO-3>Ca>SO2-4>Na>Cl->N>Mg>C>Fe>P>K>Zn。The output quantities of ions and elements within the soil surface water and the soil leakage water in the Abies georgei forest ecosystem of Mount Sejila in Tibet accounted for only a very little ratio in the total nutrient input quantities,they both accounted for less than 1%. The litters on the soil surface and the ions and/or element SO^(2-)_4, HCO^-_3 and N within the soil were eluviated, and the elements K, Zn and P were absorbed. The sequence of the total soil eluviation quantities was SO^(2-)_4 >Cl^->HCO^-_3>C>Mg>N>Ca>Fe>Na>Zn>P>K, and that of total soil eluviation coefficients was HCO^-_3>Ca>SO^(2-)_4>Na>Cl^->N>Mg>C>Fe>P>K>Zn.

关 键 词：西藏 色季拉山 冷杉林生态系统 养分淋溶输出 物质循环 

分 类 号：S791.14[农业科学—林木遗传育种]