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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (23): 147-154.

所属专题： 农业生态

• 林学 园艺 园林 • 上一篇    下一篇

衡阳盆地紫色土丘陵坡地自然恢复灌丛阶段植物群落主要种群生态位特征

陈璟   

  • 收稿日期:2009-06-23 修回日期:2009-08-31 出版日期:2009-12-05 发布日期:2009-12-05

Niche Characteristics of Shrub Stage in Natural Vegetation Recovery Process in Sloping-land with Purple Soils in Hengyang Basin

  • Received:2009-06-23 Revised:2009-08-31 Online:2009-12-05 Published:2009-12-05

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摘要： 通过对衡阳盆地紫色土丘陵坡地自然恢复灌丛阶段植物群落生态位特征进行研究，结果表明：（1）大部分种群水平生态位宽度不宽，只有3个种群宽度大于0.5以上；（2）垂直生态位也较窄，各种群垂直生态位多集中于0.1-0.3之间，占84.5%，表明对垂直空间利用不充分；（3）虽然各种群之间的生态位重叠值均非常小，但有78.00%的种对间存在水平生态位重叠，表明各种对间对资源的共享趋势较为明显，各种群对资源分享的程度很高；（4）所有的种对均存在垂直生态位重叠，表明各种对资源的分享程度极为剧烈；（5）各种对水平生态位相似性比例较低，而高度生态位相似性比例则较高，说明各种群对以光为主导因子的高度资源要求相似。

关键词: 菊花, 菊花, 外植体, 再生体系

Abstract: The niche characteristics were studied in natural vegetation recovery process in sloping-land with purple soils in Hengyng Basin.The results showed that:(1)The niche breadth of most populations was narrow,only three populations’ horizontal niche breadth was larger than 0.5;(2)The height niche was also narrow,,height niche breadth of the most populations(84.5%) was 0.1-0.3,which implied the useness to the perpendicular space was not sufficient; (3)There existed horizontal niche overlaps among 78.00% of the pairs of the populations although the niche overlap value was low,which implied the share trend to all resources was obvious,and the degree of share was high;(4)There existed height niche overlaps among all populations,which implied the degree of share to all resources was violent;(5)The horizontal niche percentage similiarity between the pairs of populations was low,and the height niche percentage similiarity between the pairs of populations was high,which implied those populations shared the like height ecological resources dominated by light.