生态学杂志2025，Vol.44Issue(2)：406-416,11.DOI:10.13292/j.1000-4890.202502.040
亚热带森林土壤团聚体呼吸作用对温度的响应
Response of respiration of soil aggregates to temperature in subtropical forests
摘要
Abstract
We explored the differences in respiration rates of soil aggregates in different soil types in subtropical for-ests in China and their response to temperature changes,by focusing on neutral limestone soil developed from car-bonate rocks and acidic red soil developed from granite cataclasite.The respiration rates of soil aggregates with dif-ferent sizes(0.106-0.25,0.25-0.5,and 0.5-2 mm)were measured at different temperatures(5,15,25,35 ℃)after 1,3,7,10,13,17,and 21 days of incubation.The cumulative respiration rate,contribution rate of soil respiration,and its temperature sensitivity(Q10)were estimated to examine the differences and main control-ling factors at different temperatures and aggregate scales.The results showed that the cumulative respiration rates of the O/A horizon and AB horizon of limestone soil were generally higher than that of red soil.The influencing factors of soil cumulative respiration rate in different temperature ranges were different.Organic carbon(TOC),total nitro-gen(TN),total phosphorus(TP),and C/N were the main factors at 15-35 ℃,while pH and C/N were the main factors at 5 ℃.At the aggregate scale,there was no significant difference in the cumulative respiration rates among different aggregate classes of limestone soil and red soil at the same temperature.The Q10 values of different aggre-gates in limestone soil were higher than those in red soil.There was no significant difference among individual ag-gregate classes of limestone soil and red soil.The contribution rate of respiration of large aggregates was the largest in the O/A horizon of red soil as well as the O/A horizon and AB horizon of limestone soil,while that in the AB ho-rizon of red soil was the opposite.This study revealed that compared to the acidic red soil,the respiration rate of limestone soil in subtropical forest ecosystems showed more significant positive feedback to future global warming,highlighting the need to emphasize its contribution to global carbon balance.关键词
亚热带森林/岩溶/土壤呼吸/团聚体/温度敏感性(Q10)Key words
subtropical forest/karst/soil respiration/aggregate/temperature sensitivity(Q10)引用本文复制引用
白雪,梁丹萍,陈浏寰,颜湘婷,赵玉姣,梁建宏,朱婧..亚热带森林土壤团聚体呼吸作用对温度的响应[J].生态学杂志,2025,44(2):406-416,11.基金项目
国家自然科学基金项目(41967005)、广西自然科学基金项目(2020GXNSFBA159029)、广西高校引进海外高层次人才百人计划专项经费和自然资源部地球化学探测重点实验室开放基金课题(AS2019P02)资助. （41967005）
