浙江农林大学学报2024，Vol.41Issue(3) ：486-495.DOI:10.11833/j.issn.2095-0756.20230369

蚯蚓活动对毛竹林土壤二氧化碳排放及活性有机碳的影响

Responses of CO2 emissions and labile organic carbon to earthworm activities in Phyllostachys edulis forest soil

田肖清凡 肖向前 邱裕丰 卜爱爱 雷刚 陈有超 蔡春菊 唐荣贵 蔡延江
浙江农林大学学报2024，Vol.41Issue(3) ：486-495.DOI:10.11833/j.issn.2095-0756.20230369
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蚯蚓活动对毛竹林土壤二氧化碳排放及活性有机碳的影响

Responses of CO2 emissions and labile organic carbon to earthworm activities in Phyllostachys edulis forest soil

田肖清凡 1肖向前 1邱裕丰 1卜爱爱 1雷刚 2陈有超 3蔡春菊 2唐荣贵 3蔡延江3
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作者信息

  • 1. 浙江农林大学省部共建亚热带森林培育国家重点实验室,浙江杭州 311300;浙江农林大学环境与资源学院,浙江杭州 311300
  • 2. 国际竹藤中心三亚研究基地,海南三亚 572000
  • 3. 浙江农林大学省部共建亚热带森林培育国家重点实验室,浙江杭州 311300
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摘要

[目的]土壤动物对土壤碳循环至关重要.探究蚯蚓活动对毛竹Phyllostachys edulis林下土壤二氧化碳(CO2)排放及活性有机碳变化的影响.[方法]通过3个月的温室盆栽试验,以单独种植毛竹为对照(ck),以分别添加凋落物(MBL)和凋落物及蚯蚓(MBLE)为处理,采用静态箱-气相色谱法分段采集并分析土壤释放的CO2,测定土壤有机碳、颗粒态有机碳、可溶性有机碳、矿物结合态有机碳以及微生物生物量碳质量分数.[结果]蚯蚓活动极显著增加了20.3％的毛竹生物量(P＜0.01),其对土壤CO2排放的影响随时间变化敏感.试验前期(＜51 d),MBLE处理与MBL处理的CO2累积排放量无显著性差异,而试验后期(＞51 d),MBLE处理的CO2累积排放量显著高于MBL处理(P＜0.05),但试验结束时(第85天),MBLE处理的土壤CO2累积排放量较MBL处理仅增加4.5％.此时,MBL处理土壤CO2排放通量较MBLE处理高25.2％.土壤碳质量分数对蚯蚓活动的响应同样随时间变化敏感.MBLE处理下的土壤有机碳、可溶性有机碳、颗粒态有机碳及矿物结合态有机碳质量分数在前68 d均低于MBL处理,但试验结束时(第85天),MBLE处理的可溶性有机碳质量分数显著提高了 15.2％(P＜0.05);土壤有机碳、矿物结合态有机碳和颗粒态有机碳质量分数分别提高了 8.5％、8.5％和10.6％;但土壤微生物生物量碳质量分数极显著降低了 26.3％(P＜0.01).[结论]蚯蚓活动可促进毛竹生长,增加毛竹林土壤碳质量分数,并在试验结束时降低土壤CO2排放通量及累积排放量.图3表2参47

Abstract

[Objective]The objective is to understand the effects of earthworm activity on soil CO2 emission and labile organic carbon change in Phyllostachys edulis forest,which is crucial to comprehending the role that soil fauna plays in the carbon cycle of P.edulis forest.[Method]Three treatments including ck(control,P.edulis),MBL(P.edulis with litter)and MBLE(P.edulis with litter and earthworms)were employed to conduct a three-month greenhouse pot experiment.Static chamber-gas chromatograph was used to collect and analyze CO2 release from soil in different times.The contents of soil organic carbon(SOC),particulate organic carbon(POC),dissolved organic carbon(DOC),mineral-associated organic carbon(MAOC)and microbial biomass carbon(MBC)were measured.[Result]The activity of earthworms significantly increased the biomass of P.edulis by 20.3％(P＜0.01),and the response of soil CO2 emission to earthworm activity was sensitive to changes over time.There was no significant difference in CO2 emissions between MBLE treatment and MBL treatment in the early stage of the experiment(＜51 d).However,in the later stage of the experiment(＞51 d),the cumulative CO2 emission under MBLE treatment was significantly higher than that under MBL treatment(P＜0.05).On the 85th day,the cumulative CO2 emission under MBLE treatment increased only by 4.5％compared with MBL treatment.The soil CO2 emission flux under MBL treatment increased by 25.2％compared with MBLE treatment.The impact of earthworm activity on soil carbon mass fraction was also varies over time.The contents of SOC,DOC,POC and MAOC under MBLE treatment were lower than those under MBL treatment in the first 68 days,while the MBLE treatment significantly increased DOC content by 15.2％on the 85th day(P＜0.05).SOC content,MAOC content,and POC content increased by 8.5％,8.5％,and 10.6％,respectively.MBC content significantly reduced 26.3％at the end of the experiment(P＜0.01).[Conclusion]Earthworm activity can promote the growth of P.edulis,increase soil carbon content,and reduce soil CO2 emission flux and cumulative emissions at the end of the experiment.[Ch,3 fig.2 tab.47 ref.]

关键词

蚯蚓活动/活性有机碳/毛竹/土壤二氧化碳排放

Key words

earthworm activity/labile organic carbon/Phyllostachys edulis/soil CO2 emission

引用本文复制引用

基金项目

浙江省自然科学基金探索项目(LQ20D010003)

国际竹藤中心三亚研究基地基本科研业务费专项资金项目(1630032022001)

出版年

2024
浙江农林大学学报
浙江农林大学

浙江农林大学学报

CSTPCDCSCD北大核心
影响因子：0.929
ISSN：2095-0756
参考文献量47
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