火烧对北亚热带天然次生林土壤有机碳的影响

钱国平; 赵志霞; 李正才; 周君刚; 程彩芳; 赵睿宇; 孙娇娇

doi:10.3969/j.issn.1000-2006.201607048

钱国平,赵志霞,李正才,周君刚,程彩芳,赵睿宇,孙娇娇

南京林业大学学报（自然科学版） ›› 2017, Vol. 41 ›› Issue (06) : 115-119.

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南京林业大学学报（自然科学版） ›› 2017, Vol. 41 ›› Issue (06) : 115-119. DOI: 10.3969/j.issn.1000-2006.201607048

研究论文

火烧对北亚热带天然次生林土壤有机碳的影响

钱国平¹,赵志霞²,李正才^2*,周君刚³,程彩芳²,赵睿宇²,孙娇娇³

作者信息 +

Effects of fire on soil organic carbon in natural secondary forest in north subtropical areas

QIAN Guoping¹,ZHAO Zhixia², LI Zhengcai^2*,ZHOU Jungang³, CHENG Caifang², ZHAO Ruiyu², SUN Jiaojiao³

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摘要

【目的】研究火烧对北亚热带天然次生林土壤有机碳的影响,为火后森林生态系统恢复提供参考。【方法】以北亚热带天然次生林火烧迹地为研究对象,灾后1 a在火烧迹地和对照林地上分别设置20 m×20 m样地各5块,分层采集0～50 cm土层的土壤样品,测定各层土壤有机碳和土壤养分含量。【结果】火烧迹地土壤里含有的轻组有机质、易氧化碳、有机碳均比对照区域高,上升的幅度分别为1.2%～61.5%、9.6%～47.4%、3.9%～35.1%,且在0～10 cm土层的差异极显著(P<0.01)。次生林火灾之后,轻组有机质、易氧化碳、总有机碳基本都存储于土壤表层,深度为0～20 cm。火烧迹地土壤0～50 cm的剖面中,含有的有机碳比对照区域高,上升的幅度约18.8%且差异显著。过火后土壤总有机碳、易氧化碳和轻组有机质与土壤养分(全氮、水解氮、速效钾)的相关性均达到极显著水平。【结论】天然次生林发生火灾1 a后,火烧迹地土壤总有机碳、土壤养分的增加主要集中在表层土壤中。

Abstract

【Objective】This study was aimed at examining the effects of fire on soil organic carbon in a natural secondary forest in north subtropical regions of China.【Method】 Experiments were conducted to analyze changes in soil organic carbon and soil nutrient levels at a depth of 0-50 cm in one year after a fire in anatural secondary forest located in the north subtropical regions. Five sample plots were established in the burnt forest regions and control regions which size of 20 m×20 m, soil samples from 0-50 cm deep layers were collected, and the levels of soil organic carbon and soil nutrients were measured.【Result】 Light fraction organic matter(LFOM), easily oxidized carbon(EOC)and soil total organic carbon(TOC)levels were higher in the burnt forest soil than the control area, which increased by 1.2%-61.5%, 9.6%-47.4%, 3.9%-35.1%, respectively. The changes in these indicators reached significance at soil depth of 0-10 cm(P<0.01), implying that after the increase in TOC, soil LFOM and EOC were basically on the surface, and carbon in soil storage at a depth of 0-50 cm increased by 18.8% in one year after the forest fire compared with the control areas. LFOM, TOC and EOC directly affected the nutrient status of the soil, especially after the forest fire. 【Conclusion】 In one year after the forest fire, TOC and soil nutrient content increased mainly in surface soil.

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钱国平,赵志霞,李正才,周君刚,程彩芳,赵睿宇,孙娇娇. 火烧对北亚热带天然次生林土壤有机碳的影响[J]. 南京林业大学学报（自然科学版）. 2017, 41(06): 115-119 https://doi.org/10.3969/j.issn.1000-2006.201607048

QIAN Guoping,ZHAO Zhixia, LI Zhengcai,ZHOU Jungang, CHENG Caifang, ZHAO Ruiyu, SUN Jiaojiao. Effects of fire on soil organic carbon in natural secondary forest in north subtropical areas[J]. JOURNAL OF NANJING FORESTRY UNIVERSITY. 2017, 41(06): 115-119 https://doi.org/10.3969/j.issn.1000-2006.201607048

中图分类号： S718.5

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基金

基金项目:浙江省重点科技创新团队项目(2010R50030); 浙江省自然科学基金项目(LY12C03012); “十二五”国家科技支撑计划(2012BAC13B02) 第一作者:钱国平(1470086994@qq.com),工程师,负责论文的写作。赵志霞(254186546@qq.com),助理研究员,负责试验与论文的写作指导。*通信作者:李正才(lizccaf@126.com),副研究员。