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坡形对华南省藤种群天然更新及生长的影响

李雁冰1,2,范少辉1,彭超1,3,陈本学1,梁昌强4,刘广路1*   

  1. 1国际竹藤中心, 竹藤科学与技术重点实验室, 北京 100102;2周口师范学院, 河南周口 466001;3湖南省林业科学院, 长沙 410004;4海南省甘什岭自然保护区管理站, 海南三亚 572000)
  • 出版日期:2019-05-10 发布日期:2019-05-10

Effects of slope form on natural regeneration and growth of Calamus rhabdocladus.

LI Yan-bing1,2, FAN Shao-hui1, PENG Chao1,3, CHEN Ben-xue1, LIANG Chang-qiang4, LIU Guang-lu1*   

  1. (1Key Laboratory for Bamboo and Rattan, International Center for Bamboo and Rattan, Beijing 100102, China; 2Zhoukou Normal University, Zhoukou 466001, Henan, China; 3Hunan Academy of Forestry, Changsha 410004, China; 4Management Station of Ganzaling Natural Reserve in Hainan Province, Sanya 572000, Hainan, China).
  • Online:2019-05-10 Published:2019-05-10

摘要: 为揭示低地次生雨林华南省藤种群天然更新的适生坡形,以海南甘什岭天然分布的华南省藤为研究对象,以种群数量、生长特征(株高、地径、羽叶面积等)和死亡率为天然更新的衡量指标,运用方差分析、多重比较和相关性分析等方法,分析不同坡形(凸坡、缓坡、凹坡)与华南省藤不同生长阶段种群更新的关系。结果表明,坡形对华南省藤种群数量、株高、羽叶面积、相对生长速率和死亡率等的影响均达到显著水平(P<0.05),对地径影响极显著(P<0.01),对高径比影响不显著(P>0.05)。其中,凹坡种群数量(84株·hm-2)、株高(212.38 cm)、羽叶面积(36.22 m2)最大,株高(0.153%)和羽叶面积月相对生长率(0.145%)最高,幼苗期凹坡死亡率低(8.72%),藤株整体生长最好。坡形是影响海南低地次生雨林华南省藤种群数量及生长特征的重要环境因子,坡形通过改变区域土壤水分、养分、光照等,影响华南省藤的种群数量和生长。凹坡是华南省藤的适生坡形,在今后华南省藤的资源更新保育和人工栽培中,应优先选择。

关键词: 土壤水分, 鱼鳞坑, 覆盖措施, 旱作枣园

Abstract: To examine the effects of slope form on natural renewal of Calamus rhabdocladus in the lowland secondary rainforest, we investigated population size, growth characteristics (plant height, ground diameter, and leaf area), and mortality rate of Calamus rhabdocladus in Ganzaling, Hainan Province. The relationship between different slope forms (convex slope, gentle slope, and concave slope) and population renewal at different growth stages was analyzed by means of variance analysis, multiple comparison, and correlation analysis. The results showed that slope forms had significant effects on population size, plant height, basal diameter, leafarea, relative growth rate, and mortality of C. rhabdocladus (all P<0.05), but with no effect on the ratio of height to diameter (P>0.05). The population size, plant height, and leaf area of C. rhabdocladus were the highest on concave. The slope form was an important environmental factor affecting population size and growth of C. rhabdocladus by changing soil water, nutrient and light in Ganzaling of Hainan. The concave slope was relatively favorable to regeneration and growth of C. rhabdocladus. In the course of resource renewal and conservation of artificial cultivation of C. rhabdocladus, the concave slope should be given priority.

Key words: soil moisture, scale-like pit, mulching, dryland jujube orchard.