植物生态学报 ›› 2008, Vol. 32 ›› Issue (1): 88-94.doi: 10.3773/j.issn.1005-264x.2008.01.010

• 论文 • 上一篇    下一篇

江西千烟洲人工针叶林下狗脊蕨群落生物量

马泽清1,2;刘琪璟1*;徐雯佳1,2;李轩然1,2;刘迎春1,2   

  1. (1 中国科学院地理科学与资源研究所,北京 100101);(2 中国科学院研究生院,北京 100049)
  • 出版日期:2008-01-30 发布日期:2008-01-30
  • 通讯作者: 刘琪璟

A PRELIMINARY STUDY ON BIOMASS OF WOODWARDIA JAPONICA COMMUNITY UNDER A CONIFEROUS PLANTATION IN SUBTROPICAL CHINA

MA Ze-Qing1,2; LIU Qi-Jing1*; XU Wen-Jia1,2; LI Xuan-Ran1,2; LIU Ying-Chun1,2   

  1. 1Institute of Geographic Science and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; 2 Graduate University of Chinese Academy of Sciences, Beijing 100049, China
  • Online:2008-01-30 Published:2008-01-30
  • Contact: LIU Qi-Jing

摘要: 根据野外调查和实验分析研究了江西省千烟洲人工针叶林下狗脊蕨(Woodwardia japonica)群落的生物量、细根生物量、净初级生产力(Net
primary productivity, NPP)、 比叶面积(Specific leaf area, SLA) 和叶面积指数(Leaf area index, LAI)等。通过叶片参数和地上生
物量的相关关系建立了狗脊蕨单株地上生物量估算模型,分别 为W1=0.021H1.545R2=0.790)和W1=2.518(D2H0 .616R2=0.894;H为株高
D为地径)。人工针叶林下灌草层地上生物量为367.8 g•m-2(52~932 g•m-2),凋落物为1 631 g•m-2(672~2 763 g•m-2),分别占
乔木层地上生物量的4.7%(1.55%~13.2%)和20.7%(7.6%~32.1%)。狗脊蕨群落地上生物量和NPP分别为266.6 g•m-2和88.67 g•m-2•a -1
,其中狗脊蕨种群占73.7%;地下生物量为212.6 g•m-2。狗脊蕨的SLA和叶干物质含量(Leaves day mutter content, LDMC)分别为144.0
cm2•g-1和31.99%,二者之间呈显著负相关;最佳叶面积估算模型为S=21.922 6-0.152L2+0.000 9L3(9.0≤L(叶片长度)≤23.5;1.4≤W
叶片宽度)≤5.9)。狗脊蕨种群的LAI为1.8。土壤含水量对狗脊蕨生物量有显著影响。群落生物量与土壤有机质和全氮含量正相关

Abstract:
Aims The purpose of the study was to determine the biomass (including fine roots), NPP, specific leaf area (SLA), leaf area
index (LAI), and soil nutrients of Woodwardia japonica community under artificial coniferous forest in Jiangxi Province in
subtropical China.
Methods Plants in quadrats were harvested and dry weight was measured. Leaf area was measured by scanning, and SLA was
represented by the ratio of dry matter to leaf area. LAI of the population was estimated by SLA and leaf biomass. 
Important findings The relationships between aboveground biomass (W1) and geometric parameters of W. japonica were
established (W1=0.021H1.545R2=0.790)and W1=2.518(D2H0.616R2=0.894), H: height; D: diameter ). The biomass of
herbage and shrub under coniferous plantation was 367.8 g•m-2(52-932 g•m-2), 4.7% of canopy layer. The accumulated
litter under forest was 1 631 g•m-2(672-2 763 g•m-2 ). The above-and under-ground biomass of W. japonica community were
266.6 g•m-2 and 212.6 g•m-2, respectively. In total, the biomass of W. japonica population approximately accounted for
73.7% of the whole herbaceous layer. There was a significant negative-correlation between SLA and leaves dry matter content 
LDMC ). A leaf area (S) model was established in the form of S=21.922 6-0.152 L2+0.000 9L3(9.0≤L: max length of leaf ≤
23.5;1.4 ≤ W: max width of leaf ≤5.9).LAI ofW. japonica population was estimated as 1.8 m2•m-2. Soil water content
affected biomass of the community. A positive correlation between biomass and soil nitrogen concentration or soil organic
matter (SOC) was identified.