欢迎访问《中国农学通报》,

中国农学通报 ›› 2015, Vol. 31 ›› Issue (19): 180-184.doi: 10.11924/j.issn.1000-6850.casb15010059

• 资源 环境 生态 土壤 气象 • 上一篇    下一篇

衡阳紫色土丘陵坡地恢复过程中植物群落结构及多样性的变化

颜衡祁   

  1. (湖南省祁阳县大江林场,湖南祁阳 426131)
  • 收稿日期:2015-01-10 修回日期:2015-02-08 接受日期:2015-02-25 出版日期:2015-07-28 发布日期:2015-07-28
  • 通讯作者: 颜衡祁
  • 基金资助:
    湖南省科技厅项目“湖南省紫色土荒山坡地植被恢复技术研究”(S2006N332);湖南省林业科技创新计划项目“衡阳紫色土丘陵坡地植被恢复技术研究与示范”(XLK201341)。

Changes of Plant Community Structure and Bio-diversity During Re-vegetation on Sloping-land with Purple Soils in Hengyang of Hunan Province

Yan Hengqi   

  1. (Qiyang County Dajiang Forest Farm, Qiyang Hunan 426131)
  • Received:2015-01-10 Revised:2015-02-08 Accepted:2015-02-25 Online:2015-07-28 Published:2015-07-28

摘要: 探讨衡阳紫色土丘陵坡地不同恢复阶段植物群落结构及多样性的变化。以典型的衡阳紫色土丘陵坡地不同植被恢复阶段为研究对象,采用空间序列代替时间序列的方法,选用立地条件基本相似的演替初期(Ⅰ),演替中期(Ⅱ)和演替后期(Ⅲ)3个恢复阶段,通过调查取样和实验分析,分析不同恢复阶段植物群落结构及多样性。(1)从Ⅰ、Ⅱ到Ⅲ,植物地上生物总量与中旱生植物生物量显著增加(P<0.05),中生植物生物量与旱生物植物生物量先升后降,呈现出“n”型变化规律(P<0.05);(2)随着植被恢复的进行,优势种群即狗尾草种群和须芒草种群的重要值显著下降(P<0.05);(3)Patrick丰富度指数(R)的大小顺序为:Ⅱ>Ⅰ>Ⅲ(P<0.05);Simpson优势度指数(D)的大小顺序为:Ⅲ>Ⅰ>Ⅱ(P<0.05);Shannon-Wiener多样性指数(H)和Pielou均匀度指数(E)的大小顺序为:Ⅰ>Ⅱ>Ⅲ (P<0.05)。研究结果将丰富该地区植物生态学和恢复生态学的内容,为衡阳紫色土丘陵坡地生态系统的恢复和重建提供了重要依据。

关键词: 熵值法, 熵值法, 淡水产品供应商选择, 指标设置, 实例分析

Abstract: The paper aims to study the changes of plant community structure and bio-diversity during re-vegetation on sloping-land with purple soils in Hengyang of Hunan Province, South-central China. By using the space series to replace time series, three typical sampling plots, ini-phase(Ⅰ), mid-phase(Ⅱ) and ana-phase(Ⅲ), were selected to study the plant community structure and bio-diversity, the three re-vegetation stages on sloping-land with purple soils were similar and typical, and denoted three different successive stages in Hengyang of Hunan Province. The results showed that: (1) from Ⅰ, Ⅱ, to Ⅲ, the total aboveground biomass and middle-xero-phytes biomass significantly increased(P<0.05), while that of mesophyte and xerophytes increased first and then decreased, showing “n” type(P<0.05); (2) important values of the dominant populations(including Setaria viridis and Miscanthus sinensis) significantly decreased(P<0.05); (3) Patrick richness index(R) followed the order asⅡ>Ⅰ>Ⅲ(P<0.05), and the order of Simpson dominant index(D) was Ⅲ>Ⅰ>Ⅱ(P<0.05), the order of Shannon-Wiener diversity(H) and Pielou evenness index was Ⅰ>Ⅱ>Ⅲ (P<0.05). This study, to some degree, enriches and broadens the vegetation ecology and restoration ecology of the studied area and provides important theoretical basis for ecosystem restoration and reconstruction on sloping-land with purple soils in Hengyang of Hunan Province, central-south China.