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生态学杂志 ›› 2022, Vol. 41 ›› Issue (6): 1072-1078.doi: 10.13292/j.1000-4890.202206.008

• 研究报告 • 上一篇    下一篇

热带低地雨林两种攀缘竹关键适生因子

徐瑞晶1,刘广路1*,胡璇1,彭超2   

  1. 1国际竹藤中心, 北京 100102; 2湖南省林业科学研究院, 长沙 410004)
  • 出版日期:2022-06-10 发布日期:2022-06-07

Suitable environmental factors for two climbing bamboo species in tropical lowland rain forest.

XU Rui-jing1, LIU Guang-lu1*, HU Xuan1, PENG Chao2   

  1. (1International Centre for Bamboo and Rattan, Beijing 100102, China; 2Hunan Academy of Forestry, Changsha 410004, China).
  • Online:2022-06-10 Published:2022-06-07

摘要: 为探讨攀缘竹在热带低地雨林区分布的关键适生环境因子,采用样地调查、冗余分析,结合去趋势对应分析方法,研究了海南岛甘什岭保护区热带低地雨林的无耳藤竹(Dinochloa orenuda)和响子竹(Bonia levigata)群落的土壤理化、林分结构和立地条件等32个环境因子,以及它们与群落优势种分布的关系。结果表明:(1)无耳藤竹和响子竹的丛密度分别为(258.75±99.10)和(81.25±78.64)丛·hm-2;单丛平均株数分别为(19.56±8.34)和(12.00±2.65)株;株数密度分别为(2027.50±547.69)和(558.75±521.19)株·hm-2;立竹平均胸径分别为(20.45±0.55)和(6.18±0.66) mm。(2)影响两种攀缘竹分布的关键环境因子及影响大小排序为:坡位>凋落物厚度>岩石裸露度>土壤容重>坡度>田间持水量。攀缘竹丛数受土壤田间持水量和坡度正向影响,土壤容重是攀缘竹分布的限制因子;岩石裸露度和凋落物厚度分别是促进响子竹和无耳藤竹丛数的关键因子。(3)两种攀缘竹与群落优势种分布差异性较大,关系较为疏远;无耳藤竹倾向分布于大型乔木树种的热带雨林中,而响子竹更多分布于小乔木较多的雨林中。两种攀缘竹的分布主要受地形、土壤物理性质和凋落物厚度的影响,并倾向生长于土壤容重低、田间持水量高、下坡陡峭的山谷地带,但无耳藤竹喜欢凋落物厚度大的区域,而响子竹喜欢岩石裸露度大、凋落物厚度低的区域。

关键词: 攀缘竹, 土壤理化性质, 林分结构, 立地条件

Abstract: To explore the key environmental factors suitable for the distribution of climbing bamboo in tropical lowland rain forests, we examined 32 environmental factors including soil physicochemical properties, stand structure, site conditions and the relationships between the distribution of two climbing bamboo species (Dinochloa orenuda and Bonia levigata) and dominant species in a tropical lowland rain forest of Ganshiling, Hainan Island, using the methods of plot investigation, redundancy analysis and detrended correspondence analysis. Results showed that: (1) The cluster densities of D. orenuda and B. levigata were (258.75±99.10) and (81.25±78.64) clumps·hm-2. The average plant individuals per cluster were (19.56±8.34) and (12.00±2.65). The plant individial density were (2027.50±547.69) and (558.75±521.19) plants·hm-2. The mean DBH were (20.45±0.55) and (6.18±0.66) mm, respectively. (2) The environmental factors influencing the distribution of the two climbing bamboo species were in the order of: slope position > litter thickness > rock bareness > soil bulk density > slope > field water-holding capacity. The cluster densities of two climbing bamboo species were positively affected by minimum soil water-holding capacity and slope. Bulk density was the limiting factor for the distribution of two climbing bamboo species. Rock bareness and litter thickness were the key factors promoting the number of bamboo clumps in D. orenuda and B. levigata, respectively. (3) D. orenuda and B. levigata had a relatively distant relationship with dominant species in the community. D. orenuda tended to distribute in the tropical rain forest with large tree species, while B. levigata tended to distribute in the rain forest with more small trees. The distribution of D. orenuda and B. levigata in Ganshiling was mainly affected by topography, soil physical properties, and litter thickness. The two climbing bamboo species tended to grow in the valley with low soil bulk density, high field water-holding capacity and steep downhill. D. orenuda preferred the area with large litter thickness, and B. levigata preferred the area with large rock bareness and low litter thickness.

Key words: climbing bamboo, soil physicochemical properties, stand structure, site condition.