秦岭华山松种群格局规模与林窗特征

生态学杂志

秦岭华山松种群格局规模与林窗特征

兰国玉^1，2，5；雷瑞德²；安锋¹；赵永华³；陈伟⁴

¹中国热带农业科学院橡胶研究所，儋洲 571737；²西北农林科技大学林学院，杨凌 712100；³中国科学沈阳应用生态研究所树木园，沈阳 110016； ⁴华南热带农业大学网教中心，儋洲 571737；5中国科学院西双版纳热带植物园，昆明 650223

收稿日期:2005-05-08 修回日期:2005-07-22 出版日期:2006-06-10 发布日期:2006-06-10

Spatial distribution pattern, its scale, and gap characteristics of Pinus armandiipopulation in Qinling Mountains

LAN Guoyu^1,2,5; LEI Ruide²; AN Feng¹; ZHAO Yonghua³ ;CHEN Wei⁴

¹Rubber Research Institute, Chinese Academy of Tropical Agricultural Sciences, Danzhou 571737,China; ²College of Forestry, Northwest Science-Technology University of Agriculture and Forestry, Yangling 712100, China;
³Shenyang Arboretum, Institute of Applied Ecology, Chinese Academy of Scie
nces, Shenyang 110016, China; ⁴Internet Education Center, South China University of Tropical Agriculture, Danzhou 571737, China； ⁵Xishuangbanna Tropical Botanical Garden,Chinese Academy of Sciences,Kunmin 650223, China

Received:2005-05-08 Revised:2005-07-22 Online:2006-06-10 Published:2006-06-10

摘要/Abstract

摘要： 基于秦岭林区华山松群落的20 m×20 m的27块样地的野外调查数据，运用样方法和无样地法对其种群的空间分布型进行了测定，运用Greig-Smith 相邻格子样方法对其作了格局分析，判定了种群的格局规模；同时对华山松林窗做了详细的调查。结果表明，（1）种群在0～50龄时，空间分布格局为集群分布；在15～25龄时，种群有向随机分布转变的趋势，但仍属于集群分布；40～50龄种群处于由集群分布向随机分布的过渡期；50龄以后种群趋于衰退，分布格局由集群分布转向随机分布。（2）华山松种群集群分布的格局规模同样随着发育阶段的不同而有所变化。但总的来说格局的大小在100 m²。（3）华山松林窗大小与格局规模的大小相近，其中林窗大小在80～130 m²的占59%。由于林窗内光照养分条件较好，又形成与格局规模大小一致的华山松更新幼苗,进而通过“移动镶嵌循环”更新和维持种群的稳定性。

关键词: Mn有效性, 硝酸盐, 土壤水分, 湿干循环

Abstract: Based on the data collected from 27 plots of Pinus armandii community in the Qinling Mountains, this paper studied the spatial distribution pattern, its scale, and gap characteristics of P. armandii population. The results showed that P. armandii population had a contagious distribution before age 50. At the age from 15 to 20, though the population tended to distribute randomly, the distribution was still contagious. The population at the age from 40 to 50 was at the transitional stage from contagious to random distribution. After age 50, the population started to be senesced, with the distribution pattern turned from contagious to random. The distribution pattern scale of P. armandii always changed with the development stage of the population, being 100 m² in general. The gap size of P. armandii population was similar to its distribution pattern scale, and the gaps of 80～130 m² occupied 59% of the total. Because of the better light and nutrient conditions in the gap, P. armandii seedlings grew well, which helped the population kept its stability though ‘mobile mosaic circle’.

Key words: Mn availability, Calcium-nitrate, Soil moisture, Wetting-drying cycles

兰国玉^1，2，5；雷瑞德；安锋；赵永华；陈伟 . 秦岭华山松种群格局规模与林窗特征[J]. 生态学杂志.

LAN Guoyu^1,2,5; LEI Ruide²; AN Feng¹; ZHAO Yonghua³ ;CHEN Wei⁴ . Spatial distribution pattern, its scale, and gap characteristics of Pinus armandiipopulation in Qinling Mountains[J]. cje.

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