期刊论文

中文

生态学报

1000-0933

2002

22

6

859-865

10.3321/j.issn:1000-0933.2002.06.010

国家重点野外台站资助项目 （ 2 0 0 0 -0 76 ）； 国家林业局重点科研资助项目 （ 2 0 0 1 -7）； 湖南省科委重大资助项目（ 99JZY1 0 0 4 ）；

本校为第一机构

对第2代杉木幼林生态系统的降雨、穿透水、茎流、地表和地下径流等水文过程中N、 P、 K、 Ca、 Mg、 Cu、 Fe、 Zn和Mn 9种养分元素含量进行了连续5a的测定, 结果表明:降雨通过林冠后其化学特性发生明显变化,pH值出现酸化现象,穿透水中Zn和Org-N为负淋溶,其余各元素浓度有所增加.树干茎流的富集作用比穿透水强,其中Zn为负,其它元素的浓度均比林外降雨的高.地表径流中Zn>Org-N>NO3-N,与降雨中含量相比较为淋失迁移型,Ca>K>Cu>Mg>P>NH4-N>Mn>Fe为内贮型,pH值增大.地下径流中Zn>Org-N>NH4-N>K>Mn为淋失迁移型、Ca>Mg>Cu>NO3-N>P>Fe为内贮型.该系统的水循环中Ca>Mg>Fe>P为净损失、Zn>K>Org-N>NH4-N>...

Chinese fir or Cunninghamia lanceolata is a dominant native species for timber production in southern China. With the rapid expansion of planting acreage and extensive practice of successive rotations, the urgent need to sustain long-term productivity of the forested land with this species has attracted nationwide attention. The present project is concerned with the nutrient flux in the process of hydrological cycling in a forest ecosystem, which is believed to be an important aspect enabling the system to maintain its ability to be productive and stable. The project site is situated in Huiton...