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江西武夷山南方铁杉更新格局及代际关联性分析

杨清培1,金志农2,裘利洪1,施建敏1,程松林3,郭英荣3,陈伏生1**   

  1. 1江西农业大学·江西省竹子种质资源与利用重点实验室, 南昌 330045; 2江西农业大学·江西省鄱阳湖流域农业生态工程技术研究中心, 南昌 330045; 3江西武夷山国家级自然保护区管理局, 江西铅山 334500)
  • 出版日期:2014-04-10 发布日期:2014-04-10

Regeneration pattern and intergeneration association of Tsuga chinensis var. tchekiangensis in Jiangxi Wuyishan National Nature Reserve.

YANG Qing-pei1, JIN Zhi-nong2, QIU Li-hong1, SHI Jian-min1, CHENG Song-ling3, GUO Ying-rong3, CHEN Fu-sheng1**   

  1. (1Jiangxi Provincial Key Laboratory for Bamboo Germplasm Resources and Utilization, Jiangxi Agricultural University, Nanchang 330045, China; 2Jiangxi Provincial Research Center for Agricultural Ecology of Poyang Lake Watershed, Jiangxi Agricultural University, Nanchang 330045, China; 3Jiangxi Wuyishan National Nature Reserve Administration, Yanshan 334500, Jiangxi, China)
  • Online:2014-04-10 Published:2014-04-10

摘要: 为了探讨南方铁杉更新格局,以江西武夷山自然保护区南方铁杉个体空间分布的坐标点图为基础,利用Programita软件对各龄级个体进行空间分布格局与代际关联性分析。结果表明:(1)南方铁杉年龄结构基本呈“金字塔”型,属增长型种群;(2)南方铁杉幼(苗)树在小尺度上呈聚集分布,在大尺度上呈随机分布,而高龄级大树在各尺度上均呈随机分布;(3)幼(苗)树、小树与大树间在小尺度上表现出显著的空间负关联,而随着尺度和年龄的增长,代际关联性不明显。这些发现说明,南方铁杉完全能进行自然更新,但在种群发展过程中大树对小树(苗)生长具有明显的抑制作用,从而形成林下较难、林窗(或林缘)正常的更新格局。

关键词: 山地果园, 土壤水分, 黄土高原, 垂直变化, 季节变化

Abstract: Based on the point maps and point pattern analysis, we studied the natural regeneration pattern and intergeneration association of Tsuga chinensis var. tchekiangensis in Jiangxi Wuyishan National Nature Reserve. The results showed that T. chinensis var. tchekiangensis was an increasing population with an age structure of pyramid shape. Seedlings and saplings exhibited an obvious clumped distribution at smaller spatial scales, and a random distribution at larger scales, but medium and mature trees presented a random distribution at all scales. The spatial associations between seedlings (or saplings) and medium, mature trees were negative at smaller scales, but not significant between medium and mature trees. These findings suggested that T. chinensis var. tchekiangensis regenerated naturally in forest gaps or at edges rather than under forest canopy, since the mature trees seemed to have a shading effect on seedlings and saplings.

Key words: the Loess Plateau, seasonal variation, vertical variation, mountain apple orchard, soil moisture