亚热带山地森林源头溪流米槠凋落叶分解的水溶性碳氮磷动态

郑旭灵; 魏文涛; 张潇月; 岳楷; 吴福忠

doi:10.13870/j.cnki.stbcxb.2022.06.037

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亚热带山地森林源头溪流米槠凋落叶分解的水溶性碳氮磷动态

更新时间：2025-03-12

- 亚热带山地森林源头溪流米槠凋落叶分解的水溶性碳氮磷动态
- Dynamics of Water-Soluble Carbon, Nitrogen and Phosphorus Content During Litter Decomposition of
- 水土保持学报 2022年36卷第6期页码：309-315
- 作者机构：
  
  1. 福建师范大学湿润亚热带生态-地理过程教育部重点实验室,福州,350007
  2. 福建三明森林生态系统国家野外科学观测研究站,福建,三明,365002
- 作者简介：
- 基金信息：
  
  国家自然科学基金项目(32171641,31922052)
- DOI：10.13870/j.cnki.stbcxb.2022.06.037
  中图分类号： S718.53
- 纸质出版：2022
- 稿件说明：
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郑旭灵, 魏文涛, 张潇月, 等. 亚热带山地森林源头溪流米槠凋落叶分解的水溶性碳氮磷动态[J]. 水土保持学报, 2022,36(6):309-315.

ZHENG Xuling, WEI Wentao, ZHANG Xiaoyue, et al. Dynamics of Water-Soluble Carbon, Nitrogen and Phosphorus Content During Litter Decomposition of[J]. 2022, 36(6): 309-315.
郑旭灵, 魏文涛, 张潇月, 等. 亚热带山地森林源头溪流米槠凋落叶分解的水溶性碳氮磷动态[J]. 水土保持学报, 2022,36(6):309-315. DOI： 10.13870/j.cnki.stbcxb.2022.06.037.

ZHENG Xuling, WEI Wentao, ZHANG Xiaoyue, et al. Dynamics of Water-Soluble Carbon, Nitrogen and Phosphorus Content During Litter Decomposition of[J]. 2022, 36(6): 309-315. DOI： 10.13870/j.cnki.stbcxb.2022.06.037.

摘要

以亚热带常绿阔叶林建群种米槠(Castanopsis carlesii)凋落叶为研究对象

对照地表环境

研究了溪流和间歇性溪流凋落叶分解过程中水溶性有机碳、氮、磷含量变化及其累积损失特征。结果表明:(1)3种生境中凋落叶水溶性有机碳的含量在分解过程中均表现出逐渐降低的趋势

但在溪流中降低程度最大

损失率达92.18%;水溶性氮含量在溪流和间歇性溪流释放时间提前

其变化程度相对较小;相比于地表和间歇性溪流

溪流中的凋落叶水溶性磷含量在分解过程中持续降低

损失率达86.75%。(2)相对于地表

溪流和间歇性溪流显著促进了凋落叶中的水溶性有机碳、氮、磷的释放速率

表明源头溪流持续流动的水体促进凋落叶水溶性组分的释放。(3)尽管3种生境中凋落叶水溶性有机碳、氮、磷元素的损失率共同受到温度、降水、环境中营养元素含量的影响

但源头溪流持续流动的水流和间歇性溪流频繁的干湿交替促进凋落叶水溶性组分的释放。研究结果为揭示亚热带山地森林凋落叶分解过程中水溶性碳氮磷在不同生境中的释放动态提供基础数据。

Abstract

Taking the litter of Castanopsis carlesii foliar

a constructive species of subtropical evergreen broad-leaved forest

as the research object

compared with the forest surface environment

a field study was conducted to understand the content changes and loss characteristics of water-soluble organic carbon

nitrogen and phosphorus during the decomposition of C. carlesii foliar litter in streams and intermittent streams. The results showed that: (1) In the three habitats

the water-soluble organic carbon of litter decreased continuously in the decomposition process

but the most loss was detected in the streams with a loss property of 92.18%. In contrast

the release time of water-soluble nitrogen in streams and intermittent streams were earlier and the changes were relatively small. Compared with the forest floor and intermittent streams

the content of water-soluble phosphorus in litter decreased continuously in streams with the loss ratio of 86.75% during the whole decomposition process. (2) Compared with the forest floor

both streams and intermittent streams significantly promoted the release rates of water-soluble organic carbon

nitrogen and phosphorus in litter

indicating that the continuous water flow could promote the release of water-soluble components during litter decomposition. (3) Although the loss rate of water-soluble organic carbon

nitrogen and phosphorus in litter were jointly affected by temperature

precipitation and the content of nutrient elements in the three habitats

the continuous water flow in head water streams and the frequent alternation of dry/wet in intermittent streams promoted the release of water-soluble components in the litter. The results provide some basic data for revealing the decomposition dynamics of water-soluble components in the litter of different habitats in subtropical mountain forests.

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