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[1]铁烈华,符饶,张仕斌,等.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,2019,25(01):16-22.[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,2019,25(01):16-22.[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:
25卷
期数:
2019年01期
页码:
16-22
栏目:
研究论文
出版日期:
2019-02-25

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
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
分类号:
S718.55
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,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值、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. (图4 表5 参36)
Abstract:
For a comprehensive understanding of the material cycle and energy flow of forest ecosystem, the cellulose degradation during foliar litter decomposition needs to be understood. The aim of the present study was to assess 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 was conducted with CO(NH2)2 as N-source and Na2SO4 as S-source. The litterbag method was to investigate three N and three S levels in nine treatments, 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, the cellulose loss rate was the maximum, ranging from 30.7% to 43.1%, and after eight months, it was the minimum, ranging from 6.8% to 29.3%. The cellulose activity and cellulose loss rate were not significantly affected by LN and LNLS during foliar litter decomposition, but were significantly inhibited by HN, HS, HNLS, LNHS, and HNHS. However, the cellulose activity, cellulose loss rate, and litter C/N ratio were significantly promoted by LS. In addition, the deposited N and S interacted with each other, jointly affecting the litter-cellulose loss rate. These results suggest that simulated N and S deposition affected cellulose degradation during foliar litter decomposition and might affect the material cycle and energy flow of the evergreen broad-leaved forest in the Rainy Area of West China.

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