四川农业大学学报 ›› 2020, Vol. 38 ›› Issue (03): 257-263.doi: 10.16036/j.issn.1000-2650.2020.03.002

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四川盆地西缘不同功能型树种凋落叶功能性状特征

黄川雄, 刘思凝, 邓纪坤, 龚贵荣, 吴昌焱, 熊仕臣, 徐振锋*   

  1. 长江上游林业生态工程四川省重点实验室/长江上游森林资源保育与生态安全国家林业和草原局重点实验室/华西雨屏区人工林生态系统研究长期科研基地/四川农业大学生态林业研究所,成都 611130
  • 收稿日期:2020-04-03 出版日期:2020-06-28 发布日期:2021-02-03
  • 作者简介:黄川雄,本科在读。*责任作者:徐振锋,教授,主要从事森林生态学研究,E-mail:xuzf@sicau.edu.cn。
  • 基金资助:
    国家重点研发计划项目(2016YFC0502505,2017YFC0505003); 四川省杰出青年科技人才项目(2020JDJQ0052)资助

Leaf Litter Traits of Different Functional Tree Types on the Western Edge of the Sichuan Basin

HUANG Chuanxiong, LIU Sining, DENG Jikun, GONG Guirong, WU Changyan, XIONG Shichen, XU Zhenfeng*   

  1. Forestry Ecological Engineering in the Upper Reaches of the Yangtze River Key Laboratory of Sichuan Province & National Forestry and Grassland Administration Key Laboratory of Forest Resources Conservation and Ecological Safety on the Upper Reaches of the Yangtze River & Rainy Area of West China Plantation Ecosystem Permanent Scientific Research Base, Institute of Ecology & Forestry,Sichuan Agricultural University,Chengdu 611130,China
  • Received:2020-04-03 Online:2020-06-28 Published:2021-02-03

摘要: 【目的】为了解华西雨屏区亚热带不同植物功能型树种凋落叶功能性状特征,探讨不同植物功能型树种对环境的适应策略。【方法】以四川盆地西缘都江堰灵岩山亚热带森林群落为研究对象,采集了18种树种凋落叶,分为常绿阔叶、落叶阔叶和针叶3个植物功能型,比较分析碳(C)、氮(N)、磷(P)、木质素和纤维素及其化学计量比在不同功能型树种间的变异。【结果】常绿阔叶和落叶阔叶树种凋落叶N含量显著低于针叶树种,C ∶ N比显著高于针叶树种;常绿阔叶树种凋落叶P含量显著低于落叶阔叶和针叶树种;不同功能型树种间凋落叶C含量、C ∶ P和N ∶ P比无显著差异;落叶阔叶树种木质素含量显著低于常绿阔叶和针叶树种,常绿阔叶和落叶阔叶树种凋落叶纤维素:N比显著高于针叶树种;而纤维素含量和木质素: N比在不同功能型树种间无显著差异。【结论】四川盆地西缘不同植物功能型树种之间凋落叶功能性状差异显著,这可能影响区域森林群落养分循环机制。

关键词: 亚热带森林群落, 凋落叶, 化学计量特征, 木质素, 纤维素, 植物功能型

Abstract: 【Objective】 The aim of this study was to investigate the leaf litter traits of different functional types in subtropical regions of rainy area of west China, and to explore their adaptation strategy to environmental conditions. 【Method】 This study was carried out in a subtropical forest community of Lingyan Mountain in Dujiangyan on the western edge of the Sichuan Basin. Leaf litters of 18 tree species were collected. The investigated trees were divided into three types: evergreen broad-leaved, deciduous broad-leaved and coniferous plant, according to the plant functional types. The differences of carbon (C), nitrogen (N), phosphorus (P), lignin and cellulose content and their stoichiometric ratios among different functional types were compared and analyzed. 【Result】 Litter of evergreen broad-leaved and deci-duous broad-leaved species exhibited lower N content and higher C ∶ N ratio than those of conifers. Litter of evergreen broad-leaved species relative to deciduous broad-leaved and coniferous species had significantly lower P content. There was no significant difference in litter C content, C ∶ P and N ∶ P ratios among three types of trees. Deciduous broad-leaved trees showed lower litter lignin content compared with evergreen broad-leaved and coniferous trees. Litter cellulose: N ratio of evergreen broad-leaved and deciduous broad-leaved trees was significantly higher than that of conifers, while the cellulose content and lignin: N ratio were not significantly different among the three plant functional types. 【Conclusion】 The litter functional characteristics were significantly different among the plant functional types on the western edge of the Sichuan Basin, which might influence the diverse nutrient cycling mechanism of forest communities in the region.

Key words: subtropical forest community, leaf litter, stoichiometric characteristics, lignin, cellulose, plant functional type

中图分类号: 

  • S718.5