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地球科学进展  2007, Vol. 22 Issue (9): 976-986    DOI: 10.11867/j.issn.1001-8166.2007.09.0976
生态学研究     
南亚热带森林凋落物对土壤呼吸的贡献及其影响因素
邓 琦1,2,刘世忠1,刘菊秀1,孟泽1,张德强1
1.中国科学院华南植物园,广东 广州 510650;2.中国科学院研究生院,北京 100039
Contributions of Litter-fall to Soil Respiration and Its Affacting Factors in Southern Subtropical Forests of China
DENG Qi1,2, LIU Shi-zhong1, LIU Ju-xiu1, MENG Ze1, ZHANG De-qiang1
1.South China Institute of Botany, Chinese Academy of Sciences,Guangzhou 510650,China;2.Graduate School, Chinese Academy of Sciences,Beijing 100039,China
 全文: PDF(791 KB)  
摘要:

应用静态箱—气相色谱法对鼎湖山南亚热带3种主要类型森林土壤呼吸(S+L和S)进行长达31个月的连续观测,结果表明:季风常绿阔叶林(BF)、针阔叶混交林(MF)和马尾松林(PF)凋落物对土壤呼吸年平均贡献率分别为27.82%、33.29%和36.35%,而且3个林型具有相同的季节动态特征,高峰期出现在雨季(4~9月),分别占全年贡献量的71.87%、61.89%和70.39%。土壤呼吸(S+L)与凋落物输入量的季节变化有极显著正相关性(P<0.001);土壤含水量与凋落物对土壤呼吸贡献的相关性均达到极显著水平(P<0.001);土壤温度与土壤呼吸通量呈显著的正相关关系,但与凋落物对土壤呼吸的贡献的关系并不明显;降雨天气凋落物对土壤呼吸贡献率分别为28.63%、38.20%和40.12%,显著高于晴朗天气。

关键词: 凋落物影响因素南亚热带森林土壤呼吸贡献    
Abstract:

Three main types of Soil respirations(S+L and S) in southern subtropical forests in Dinghushan biosphere reserve were consecutively being monitored over 31 months by the approach of static chamber-gas chromatograph techniques. Research shows that: annual mean contribution rates of litter-fall to soil respiration in the monsoon evergreen broadleaf forest (BF), mixed broadleaf-coniferous forest (MF) and coniferous(pine) forest (PF) reached 27.82%、33.29%和36.35% respectively; Moreover, all three types of forests displayed the same seasonal dynamic features with the peaks contributions of them were from April to September, which accounts for 71.87%、61.89% and 70.39% of annual total contributions of litterfall to soil respiration respectively. Soil respiration(S+L) had an obviously positive relationship with the seasonal changes of litter-fall input(P<0.001; And soil water content had a significant impact on the contribution of litter-fall to soil respiration in the three types of forests (P<0.001); Soil temperature had positive correlativity with soil respiration flux, though it has no distinctive relationship with contribution of litter-fall to soil respiration; the contribution ratios of litter-fall to soil respiration on rainy days were 28.63%、38.20% and 40.12% respectively, which were significantly higher than those in the sunny days in the three types of forests.

Key words: Soil respiration    Litter-fall    Contribution    Affacting factor.    Southern subtropical forest
收稿日期: 2007-02-28 出版日期: 2007-09-10
:  S718.5  
基金资助:

国家自然科学基金面上项目“南亚热带森林土壤呼吸对水热季节分配格局的响应与适应”(编号:30570350);中国科学院知识创新工程重要方向性项目“亚热带森林土壤动物功能群对土壤C、N等动态及植物根际特性的影响”(编号:KZCX2-YW-413)资助.

通讯作者: 邓琦(1981-),男,广东清远人,硕士研究生,主要从事生态系统生态学研究工作.E-mail:dengqi@scib.ac.cn     E-mail: dengqi@scib.ac.cn
作者简介: 邓琦(1981-),男,广东清远人,硕士研究生,主要从事生态系统生态学研究工作.E-mail:dengqi@scib.ac.cn
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引用本文:

邓琦,刘世忠,刘菊秀,孟泽,张德强. 南亚热带森林凋落物对土壤呼吸的贡献及其影响因素[J]. 地球科学进展, 2007, 22(9): 976-986.

DENG Qi, LIU Shi-zhong, LIU Ju-xiu, MENG Ze, ZHANG De-qiang. Contributions of Litter-fall to Soil Respiration and Its Affacting Factors in Southern Subtropical Forests of China. Advances in Earth Science, 2007, 22(9): 976-986.

链接本文:

http://www.adearth.ac.cn/CN/10.11867/j.issn.1001-8166.2007.09.0976        http://www.adearth.ac.cn/CN/Y2007/V22/I9/976

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