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[1]铁烈华 符 饶 张仕斌 周世兴 黄从德**.华西雨屏区常绿阔叶林凋落叶分解过程中纤维素降解对模拟氮、硫沉降的响应[J].应用与环境生物学报,2018,24(06):1-11.[doi:10.19675/j.cnki.1006-687x.2018.03014]
 TIE Liehua,FU Rao,ZHANG Shibin,et al.Effects of simulated nitrogen and sulfur deposition on cellulose degradation during foliar litter decomposition in evergreen broad-leaved forest in the Rainy Area of West China[J].Chinese Journal of Applied & Environmental Biology,2018,24(06):1-11.[doi:10.19675/j.cnki.1006-687x.2018.03014]
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华西雨屏区常绿阔叶林凋落叶分解过程中纤维素降解对模拟氮、硫沉降的响应()
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《应用与环境生物学报》[ISSN:1006-687X/CN:51-1482/Q]

卷:
24卷
期数:
2018年06期
页码:
1-11
栏目:
研究论文
出版日期:
2018-12-25

文章信息/Info

Title:
Effects of simulated nitrogen and sulfur deposition on cellulose degradation during foliar litter decomposition in evergreen broad-leaved forest in the Rainy Area of West China
文章编号:
201803014
作者:
铁烈华 符 饶 张仕斌 周世兴 黄从德**
四川农业大学林学院 成都 611130
Author(s):
TIE Liehua FU Rao ZHANG Shibin ZHOU Shixing & HUANG Congde**
College of Forestry, Sichuan Agricultural University, Chengdu 611130, China
关键词:
纤维素降解 氮沉降 硫沉降 常绿阔叶林 华西雨屏区
Keywords:
cellulose degradation nitrogen deposition sulfur deposition evergreen broad-leaved forest Rainy Area of West China.
DOI:
10.19675/j.cnki.1006-687x.2018.03014
摘要:
纤维素是森林凋落叶中含量最多的难分解物质,研究凋落叶分解过程中纤维素降解对氮、硫沉降的响应有利于揭示全球气候变化背景下森林生态系统物质循环和能量流动的过程。本文采用凋落叶分解袋法,以CO(NH2)2为氮源,Na2SO4为硫源,设置氮、硫双因素三水平共9种处理,即对照(CK)、低氮(LN)、高氮(HN)、低硫(LS)、高硫(HS)、低氮低硫(LNLS)、高氮低硫(HNLS)、低氮高硫(LNHS)和高氮高硫(HNHS),研究氮、硫沉降对华西雨屏区常绿阔叶林凋落叶分解过程中纤维素降解的影响。结果显示:氮、硫沉降各处理的纤维素损失率在沉降第4个月时最大,损失30.7~43.1%,在第8个月时最小,净累积6.8~29.3%;LN和LNLS对纤维素酶活性和凋落叶纤维素损失率的影响不显著,LS显著提高了分解过程中凋落叶C/N比、纤维素酶活性和纤维素损失率,HN、HS、HNLS、LNHS和HNHS显著降低了纤维素酶活性和纤维素损失率;模拟氮、硫复合沉降对纤维素降解的交互作用显著。本研究表明,氮、硫沉降相互作用,共同影响华西雨屏区常绿阔叶林凋落叶分解过程中纤维素的降解,进而可能影响该区域常绿阔叶林生态系统物质循环和能量流动。
Abstract:
Abstract For a comprehensive understanding of the material cycle and energy flow of forest ecosystem, the cellulose degradation during foliar litter decomposition is needed to be known. This paper aimed to study the effects of simulated nitrogen (N) and sulfur (S) deposition on cellulose degradation during foliar litter decomposition in an evergreen broad-leaved forest, the Rainy Area of West China. A one-year field experiment of simulated N and S deposition had been conducted with CO(NH2)2 as N source and Na2SO4 as S source. Three N and three S levels resulting in nine treatments were investigated by the litter bag method, including control (CK), low N (LN), high N (HN), low S (LS), high S (HS), low N and low S (LNLS), high N and low S (HNLS), low N and high S (LNHS) and high N and high S (HNHS). The results showed that after four months of simulated deposition experiment, the cellulose loss rate was maximum, ranging from 30.7 % to 43.1 %. Furthermore, the rate was minimum after deposition for eight months, cumulating from 6.8% to 29.3%. The cellulose activity and cellulose loss rate were insignificant by LN and LNLS during foliar litter decomposition, but that was inhibited significantly by HN, HS, HNLS, LNHS and HNHS. Whereas, the cellulose activity and cellulose rate and the litter C/N were significantly promoted by LS. In addition, simulated N and S deposition interacted with each other, which affected the litter cellulose loss rate together. The results suggest that simulated N and S deposition have affected cellulose degradation during foliar litter decomposition and may affect the material cycle and energy flow of the evergreen broad-leaved forest in the Rainy Area of West China.

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备注/Memo

备注/Memo:
收稿日期: 2018-03-10 接受日期: 2018-04-10
*国家“十二五” 科技支撑计划项目(2010BACO1A11)和长江上游生态安全协同创新中心开放基金项目资助?
**通讯作者(E-mail:lyyxq100@aliyun.com)
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更新日期/Last Update: 2018-05-02