文章摘要
王玺洋,李亮,李晓晖,辛在军,何石福,孙小艳.2009—2019年红壤典型区水稻土有机碳组分库时空变化[J].农业环境科学学报,2023,42(3):589-598.
2009—2019年红壤典型区水稻土有机碳组分库时空变化
Spatio-temporal variations of soil organic carbon pools of paddy soil in a typical red soil region from 2009 to 2019
投稿时间:2022-07-23  
DOI:10.11654/jaes.2022-0745
中文关键词: 红壤区|活性碳库|缓效性碳库|惰性碳库|时空变异|水稻土固碳
英文关键词: red soil region|active SOC pool|slow SOC pool|resistant SOC pool|spatio-temporal variation|carbon sequestration in paddy soil
基金项目:国家自然科学基金项目(41867002);江西省重点研发计划项目(20202BBFL63048);江西省科学院重点研发项目(2020-YZD-27);国家红壤改良工程技术研究中心开放基金项目(2020NETRCRSI-3)
作者单位E-mail
王玺洋 江西省科学院微生物研究所, 江西省环境微生物重点实验室, 南昌 330096
江西省流域生态研究所, 南昌 330096 
 
李亮 江西省科学院微生物研究所, 江西省环境微生物重点实验室, 南昌 330096
江西省流域生态研究所, 南昌 330096 
 
李晓晖 江西省科学院微生物研究所, 江西省环境微生物重点实验室, 南昌 330096
江西省流域生态研究所, 南昌 330096 
 
辛在军 江西省科学院微生物研究所, 江西省环境微生物重点实验室, 南昌 330096
江西省流域生态研究所, 南昌 330096 
 
何石福 江西省科学院微生物研究所, 江西省环境微生物重点实验室, 南昌 330096
江西省流域生态研究所, 南昌 330096 
 
孙小艳 江西省科学院微生物研究所, 江西省环境微生物重点实验室, 南昌 330096
江西省流域生态研究所, 南昌 330096 
xiaoyan_sun05@163.com 
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中文摘要:
      为及时掌握土壤有机碳组分库的时空变化,本研究基于历史采样信息开展新一轮土壤样品采集,进行100 d土壤呼吸培养实验,借助三库一级动力学模型,获得土壤活性碳库大小(Ca)、缓效性碳库大小(Cs)和惰性碳库大小(Cr),以揭示2009—2019年江西省东乡地区表层水稻土CaCsCr的时空变化及主要影响因子。结果表明:2009—2019年研究区表层水稻土平均总有机碳(TOC)、CaCs减少,而平均Cr增加;TOC、CaCs和Cr的变化速率分别为-0.04、-0.02、-0.07 g·kg-1·a-1和0.05 g·kg-1·a-1P>0.05)。土壤属性对2019年东乡地区表层水稻土TOC、CaCr的空间变异影响较小,而土壤全氮(TN)对TOC、CsCr的变异均有较大贡献,在制定水稻土固碳措施时,应关注土壤N含量的协同变异。此外,近10年来研究区北部和中部地区水稻土有机碳组分变化幅度较大,而西南和东南地区变化幅度较小,因此,未来红壤区水稻土固碳应重视各有机碳组分的时空分异。
英文摘要:
      It is important to grasp the spatial and temporal changes of soil organic carbon(SOC)pools in time to take effective measures to enhance agroecosystem carbon sink. In this study, a new round of soil sample collection was carried out based on historical sampling information, and the samples were analyzed based on a method of CO2-C release during a 100-day incubation. The data from incubation experiments were fitted to a three-pool first-order kinetics model to obtain the sizes of active(Ca), slow(Cs)and resistant(Cr)SOC pool, which would be used to reveal the spatial-temporal changes of Ca, Cs, and Cr in the surface paddy soil in Dongxiang area in Jiangxi Province from 2009 to 2019 and their main influencing factors. The results showed that from 2009 to 2019, the total organic carbon(TOC), Ca and Cs in the surface paddy soil in Dongxiang area decreased(on average), while Cr increased(on average); the change rates of TOC, Ca, Cs, and Cr were -0.04, -0.02, -0.07 g·kg-1·a-1 and 0.05 g·kg-1·a-1, respectively(P>0.05). Soil properties made a small contribution to the spatial variations of the TOC, Ca and Cr in the surface Dongxiang paddy soils in 2019, however, soil total nitrogen(TN)played a major role in controlling the variation of TOC, Cs and Cr at the same time, thus, the synergistic variation of soil N content should be paid attention to when developing carbon sequestration measures in paddy soil. In addition, in the past 10 years, the variation range of paddy SOC component and its composition in the northern and central regions of the study area was large, while the variation range was small in the southwest and southeast regions of the study area. Therefore, in the future, the spatial and temporal variations of different SOC pools should be highlighted in carbon sequestration in the paddy soils in red soil region.
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