| 栲-木荷林凋落叶混合分解对土壤有机碳的影响 |
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| 引用本文： | 潘开文.栲-木荷林凋落叶混合分解对土壤有机碳的影响[J].生态学报,2011,31(6):1582-1593. |
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| 作者姓名： | 潘开文 |
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| 作者单位： | 1. 中国科学院成都生物研究所恢复生态学重点实验室,成都,610041
2. 四川农业大学风景园林学院,成都,611100 |
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| 基金项目： | 国家"十一五"科技攻关项目子课题资助项目(2006BAC01A15);中国科学院知识创新工程重大项目(KZCX2-XB2-02-01-03) |
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| 摘 要： | 用网袋法在20℃条件下将润楠、栲、木荷凋落叶及其混合物(润楠+栲、润楠+木荷、栲+木荷、润楠+栲+木荷)进行室内培养,测定在培养第14、42和84天时凋落叶残留率及其培养下土壤总有机碳(TOC)、可溶性有机碳(DOC)、微生物量碳(MBC),研究其相关性。结果表明:培养到14d,润楠+栲、栲+木荷、润楠+栲+木荷混合凋落叶显著提高了土壤TOC;润楠、栲、木荷、润楠+栲凋落叶显著抑制了土壤DOC;润楠+栲+木荷凋落叶显著增加了土壤MBC,润楠+栲和润楠+木荷凋落叶显著降低了土壤MBC。在培养到42d,仅润楠+木荷、栲+木荷混合凋落叶显著提高了土壤TOC和DOC;仅润楠+栲、润楠+木荷和润楠凋落叶显著减少了土壤MBC。在培养到84天,所有凋落叶都对土壤TOC与DOC无显著影响,栲+木荷、润楠+栲+木荷、木荷、润楠+栲凋落叶显著增加了土壤MBC,栲凋落叶显著减少了土壤MBC;凋落叶分解快慢为栲+木荷>木荷>润楠+栲+木荷>润楠+栲>栲>润楠+木荷>润楠。凋落叶分解率和土壤TOC、DOC及MBC在不同培养时期,具有不同的相关性。结果显示,凋落叶种类和混合对凋落叶分解以及对土壤TOC、DOC和MBC的影响效应包括促进、抑制和无显著影响,这种效应与凋落叶的质量及其分解过程中的养分释放有关。
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| 关 键 词： | 凋落物质量 分解率 总有机碳 可溶性有机碳 微生物量碳 |
| 收稿时间： | 2/4/2010 9:45:23 AM |
| 修稿时间： | 1/13/2011 6:12:54 PM |
Effects of decomposition of mixed leaf litters of the Castanopsis platyacantha-Schima sinensis forest on soil organic carbon |
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| ZHANG Xiaopeng,PAN Kaiwen,WANG Jinchuang,CHEN Qibing.Effects of decomposition of mixed leaf litters of the Castanopsis platyacantha-Schima sinensis forest on soil organic carbon[J].Acta Ecologica Sinica,2011,31(6):1582-1593. |
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| Authors: | ZHANG Xiaopeng PAN Kaiwen WANG Jinchuang CHEN Qibing |
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| Institution: | ECORES Laboratory, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;ECORES Laboratory, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;ECORES Laboratory, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China;College of Landscape Architecture,Sichuan Agricultural University,Chengdu 611100,China |
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| Abstract: | Forest soils contain about 45% carbon(C) of the terrestrial soils,and thereby minor changes of C in forest soils can significantly alter the content of atmosphere carbon dioxide(CO2).Forest litters are the principal source of C pool in forest soils,which can change C and nitrogen(N) transformations by altering the soil moisture,temperature,pH,and nitrogen and N sources into soil during the process of decomposition.However,the effects of forest litters,especially litter mixtures on soil C,including total org... |
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| Keywords: | litter quality decomposition rate total organic carbon dissolved organic carbon microbial biomass carbon |
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