生态学报2026，Vol.46Issue(4)：2064-2073,10.DOI:10.20103/j.stxb.202504170914
抛荒毛竹林带状改造对土壤CH4和N2O通量的影响
Effects of strip transformation on soil CH4 and N2O fluxes in abandoned phyllostachys edulis
摘要
Abstract
Moso bamboo(Phyllostachys edulis)forests represent crucial carbon sink ecosystems in subtropical China.However,long-term abandonment leading to stand degradation not only weakens their carbon sequestration capacity but may also reduce soil CH4 uptake and enhance N2O emissions by altering soil microenvironments.In recent years,strip cutting transformation has been widely adopted for ecological restoration of abandoned moso bamboo forests,yet its impacts on soil CH4 and N2O fluxes remains unclear.This study conducted in abandoned bamboo forests in Anji County,Zhejiang Province,established six treatments:abandoned control(CK),intensive management(IM),and three strip cutting transformation intensities(light:LC;moderate:MC;heavy:HC),along with clear-cutting transformation(CC).Through 12 months of continuous in-situ monitoring using the static chamber-gas chromatography method combined with soil factor measurements,the results showed:(1)The annual soil CH4 uptake for CK was(8.68±0.08)kg hm-2 a-1,and the annual N2O emissions was(1.46±0.02)kg hm-2 a-1.Compared to CK,LC MC,and HC significantly reduced CH4 uptake by 11.40％—32.37％(P<0.05)and increased N2O emissions by 17.12％—47.26％(P<0.05),with transformation intensity showing significant positive correlations with greenhouse gas flux changes.(2)Soil CH4 uptake exhibited highly significant negative correlations with soil temperature,moisture,nitrate nitrogen(NO-3-N),and water-soluble organic nitrogen(WSON)(R2=0.41-0.58),while N2O emissions showed significant positive correlations with soil temperature,NO-3-N,ammonium nitrogen(NH+4-N),and water-soluble carbon/nitrogen components(R2=0.49-0.67;P<0.05).(3)While enhancing soil fertility(NO-3-N increased by 13％—18％;organic carbon by 7％—12％),LC and MC treatments resulted in the lowest increases in global warming potential(GWP)(45.94％—80.70％),significantly outperforming HC and CC(P<0.05).These results demonstrate that light and moderate strip cutting transformation can achieve synergistic optimization between restoring ecological functions in abandoned bamboo forests and mitigating greenhouse gas emissions providing a scientific basis for sustainable management of subtropical bamboo forests.关键词
毛竹林/带状改造/土壤CH4通量/土壤N2O通量/土壤环境因子Key words
Moso bamboo forests/strip transformation/soil CH4 fluxes/soil N2O fluxes/soil environmental factors引用本文复制引用
刘心语,竹京玲,陈康民,王懿祥..抛荒毛竹林带状改造对土壤CH4和N2O通量的影响[J].生态学报,2026,46(4):2064-2073,10.基金项目
国家自然科学基金项目(32071762) （32071762）
