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[1]唐仕姗,杨万勤,何伟,等.川西亚高山3种优势林木不同径级根系分解及木质素、纤维素降解特征[J].应用与环境生物学报,2015,21(04):745-761.[doi:10.3724/SP.J.1145.2015.01043]
 TANG Shishan,YANG Wanqin,HE Wei,et al.Root decomposition, lignin and cellulose degradation of three dominant subalpine trees of different diameters in western Sichuan[J].Chinese Journal of Applied & Environmental Biology,2015,21(04):745-761.[doi:10.3724/SP.J.1145.2015.01043]
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川西亚高山3种优势林木不同径级根系分解及木质素、纤维素降解特征()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
21卷
期数:
2015年04期
页码:
745-761
栏目:
研究论文
出版日期:
2015-08-25

文章信息/Info

Title:
Root decomposition, lignin and cellulose degradation of three dominant subalpine trees of different diameters in western Sichuan
作者:
唐仕姗 杨万勤 何伟 王海鹏 熊莉 聂富育 徐振锋
1四川农业大学生态林业研究所,四川省林业生态工程重点实验室 成都 611130 2四川农业大学高山森林生态系统定位研究站,长江上游生态安全协同创新中心 成都 611130 3四川农业大学水稻研究所,成都 611130
Author(s):
TANG Shishan YANG Wanqin HE Wei WANG Haipeng XIONG Li NIE Fuyu XU Zhenfeng
1Key laboratory of Ecological Forestry Engineering of Sichuan Province, Institute of Ecology & Forest, Sichuan Agricultural University, Chengdu 611130, China 2Long-term Research Station of Alpine Forest Ecosystems and Collaborative Innovation Center of Ecological Security in the Upper Reaches of Yangtze River, Sichuan Agricultural University, Chengdu 611130, China 3Rice Institute, Sichuan Agricultural University, Chengdu 611130, China
关键词:
川西亚高山根系径级质量损失率木质素降解纤维素降解
Keywords:
subalpine forests of western Sichuan root diameter size mass loss rate lignin degradation cellulose degradation
分类号:
S718.5
DOI:
10.3724/SP.J.1145.2015.01043
文献标志码:
A
摘要:
采用尼龙网袋法研究川西亚高山3种优势林木(岷江冷杉、粗枝云杉和红桦)不同径级(≤2 mm,2-5 mm,≥5 mm)的根系在生长季和非生长季的质量损失及木质素和纤维素降解特征. 结果显示,红桦根系的质量损失率往往高于岷江冷杉和粗枝云杉;根系质量损失率随径级增加而下降;非生长季的质量损失率占全年质量损失率的52%-65%;方差分析表明,木质素降解在树种之间有显著差异(P < 0.05),而径级影响不显著(P > 0.05),但二者交互作用有显著影响(P < 0.05);3个树种木质素总体表现为非生长季降解生长季累积,且红桦降解或累积程度均显著高于岷江冷杉和粗枝云杉. 树种、径级及其交互作用对纤维素降解均产生显著影响(P < 0.05). 除了红桦根系以外,岷江冷杉和粗枝云杉纤维素降解没有明显的季节特征. 综上所述,川西亚高山森林根系分解及木质素和纤维素降解在物种之间有所不同,而根系径级效应与物种及季节有一定关联.
Abstract:
The objective of the study was to understand the effect of diameter size on root mass loss, lignin and cellulose degradation rates. We used nylon mesh bag method to investigate the mass loss rate and lignin and cellulose degradation rate of different root diameters (≤ 2 mm, 2–5 mm and ≥ 5 mm) of three dominant subalpine trees (Betula albo-sinensis, Abies faxoniana and Picea asperata) during the growing and non-growing seasons. The mass loss of B. albo-sinensis was higher than that of A. faxoniana and P. asperata. In addition, root mass loss decreased with root diameter for each species. Root mass loss during the non-growing season was 52%–65% of the total loss of a year. In both growing and non-growing seasons, tree species other than root diameter had a significant influence on lignin degradation rate. For all three species, lignin degraded in the non-growing season but accumulated in the growing season. Regardless of root diameter, the magnitude of degradation/accumulation of B. albosinensis was greater than that of A. faxoniana and P. asperata. Tree species, diameter size and their interaction all had significant effects on cellulose degradation rate (P < 0.05). No obvious seasonal dynamic of cellulose degradation rate was detected in A. faxoniana or P. asperata. The results indicated that tree species have significant effects on root decomposition, lignin and cellulose degradation. However, the effect of root diameter is to some extent confined by tree species and the season.

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备注/Memo

备注/Memo:
国家自然科学基金项目(31170423,31200474,31270498)、国家“十二五”科技支撑计划项目(2011BAC09B05)、中国博士后科学基金项目(2013M540714,2012T50782,2014T70880)和四川省教育厅重点项目(12ZA105)资助 Supported by the National Natural Science Foundation of China (31170423, 31200474, 31270498), the Sci-tech Pillar Project of the Twelfth Five-year Plan of China (2011BAC09B05), the Post-doc Foundation Program of China (2013M540714, 2012T50782, 2014T70880) and the Key Project of Sichuan Provincial Education Department (12ZA105)
更新日期/Last Update: 2015-08-25