四川农业大学学报 ›› 2020, Vol. 38 ›› Issue (06): 685-692.

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川西高山峡谷区不同类型彩叶林枯落物和土壤生态化学计量特征

赵伊博, 方皓月, 江光林, 昝燕, 刘思艺, 刘思凝, 王丽霞, 谭波, 李晗, 游成铭, 徐振锋, 张丽*   

  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:2020-07-30 出版日期:2020-12-28 发布日期:2021-02-05
  • 作者简介:赵伊博,本科生。 *责任作者:张丽,博士,讲师,主要从事亚高山森林土壤过程等方面的研究,E-mail:zhangli19830116@hotmail.com。
  • 基金资助:
    国家自然科学基金(31700542); 四川农业大学科研兴趣培养项目(2019273); 四川省杰出青年科技人才计划项目(2020JDJQ0052)

Stoichiometry Characteristics of Litter and Soil in Different Types of Color-Leaf Forests in the Alpine Valley Region of Western Sichuan

ZHAO Yibo, FANG Haoyue, JIANG Guanglin, ZAN Yan, LIU Siyi, LIU Sining, WANG Lixia, TAN Bo, LI Han, YOU Chengming, XU Zhenfeng, ZHANG Li*   

  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 & Key Laboratory of Forestry Ecological Engineering Sichuan Agricultural University,Chengdu 611130,China
  • Received:2020-07-30 Online:2020-12-28 Published:2021-02-05

摘要: 【目的】探讨川西高山峡谷区不同类型彩叶林生态系统的养分循环和系统稳定机制。【方法】采用野外调查与室内分析相结合的方法,研究了川西高山峡谷区不同类型彩叶林-针叶纯林 (落叶松 Larix gmelinii)、针阔混交林 (糙皮桦Betula utilis-岷江冷杉Abies faxoniana和白桦Betula platyphylla-云杉Picea asperata-川滇长尾槭Acer caudatum var. prattii)、阔叶纯林 (橿子栎Quercus baronii)和阔叶混交林 (亮叶桦Betula luminifera-青麸杨Rhus potaninii和橿子栎-白刺花Sophora davidii-黄栌Cotinus coggygria)中地表枯落物和土壤C、N、P的生态化学计量特征。【结果】结果表明,相较于土壤,6种彩叶林中枯落物C和N含量均较高,而P含量较低。不同彩叶林中,枯落物的C、N含量在针叶林中最低,而P含量在阔叶混交林中最低。土壤C、N含量在亮叶桦-青麸杨林中最高,P含量在白桦-云杉-川滇长尾槭林中最高。不同彩叶林间枯落物C/N无显著差异,而土壤C/N在糙皮桦-岷江冷杉林中最高,与其他林型均存在显著差异。枯落物和土壤的C/P和N/P均在亮叶桦-青麸杨林最高。另外,森林枯落物与土壤C、N和P含量间以及C/P和N/P之间存在显著正相关关系。【结论】白桦-云杉-川滇长尾槭林和亮叶桦-青麸杨林具有更丰富的养分含量,为该区域森林的生态建设以及彩叶林的生态效益评价提供了一定的参考依据。

关键词: 高山峡谷区, 枯落物, 土壤, 养分循环, 化学计量比

Abstract: 【Objective】 To investigate the carbon (C), nitrogen (N) and phosphorus (P) characteristics of litter and soil in different types of color-leaf forests in the alpine valley region of Western Sichuan. The results will contribute to a deeper understanding of nutrient cycling and stability mechanisms in forest ecosystems in Alpine Gorge Region. 【Method】 The field investigation and laboratory analysis was com-bined to study the litter and soil C, N, P stoichiometric characteristics in the pure coniferous forest (Larix gmelinii), coniferous and broad-leaved mixed forest (Betula utilis-Abies faxoniana and Betula platyphylla-Picea asperata-Acer caudatum var. prattii), pure broad-leaved forest (Quercus baronii) and broad-leave mixed forest (Betula luminifera-Rhus potaninii and Sophora davidii-Cotinus coggygria) during August 2018. 【Result】 The results showed that the contents of litter C and N in color-leaf forests were higher than that in the soil, while the content of P was lower than that in the soil. Among different types of color-leaf forest, the coniferous forests had the lowest litter C and N contents, while the broad-leaved mixed forests had the lowest litter P content. Betula luminifera-Rhus potaninii forest had the highest soil C and N contents, and Betula platyphylla-Picea asperata-Acer caudatum var. prattii forest had the highest soil P content. There was no significant difference in litter C/N ratio between different forest types. But the ratio of soil C/N in Betula utilis-Abies faxoniana forest was the highest, which was significantly different from other forest types. The Betula luminifera-Rhus potaninii forest had the highest ratio of C/P and N/P in both litter and soil. In addition,the C, N and P contents and C/P and N/P were significantly positively correlated between litter and soil. 【Conclusion】 The Betula platyphylla-Picea asperata-Acer caudatum var. prattii and Betula luminifera-Rhus potaninii have richer nutrient content than other forests. It provided scientific data for the regional forests construction and the ecological benefit evaluation system of colorful forests.

Key words: alpine valley, litter, soil, nutrient cycling, stoichiometry

中图分类号: 

  • S718.5