| 玉米生长对石灰性土壤无机碳与有机碳释放的根际效应 |
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| 引用本文： | 孙昭安,赵 诣,朱 彪,陈 清,曹 慧,何敏毅,孟凡乔.玉米生长对石灰性土壤无机碳与有机碳释放的根际效应[J].土壤学报,2021,58(4). |
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| 作者姓名： | 孙昭安 赵 诣 朱 彪 陈 清 曹 慧 何敏毅 孟凡乔 |
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| 作者单位： | 潍坊学院生物与农业工程学院,山东省高校生物化学与分子生物学重点实验室,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,北京大学生态研究中心,城市与环境学院,地表过程分析与模拟教育部重点实验室,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,潍坊学院生物与农业工程学院,山东省高校生物化学与分子生物学重点实验室,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室,中国农业大学资源与环境学院,农田土壤污染防控与修复北京市重点实验室 |
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| 基金项目： | 国家自然科学基金项目(31370527, 0870414)和潍坊学院博士科研启动基金项目(2019BS12) |
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| 摘 要： | 利用IsoSource模型三源区分玉米根际土壤CO_2释放来源(根源呼吸、土壤无机碳与有机碳释放),研究玉米根际效应对石灰性土壤无机碳与有机碳释放的影响。在玉米拔节期(24～53 d)、抽穗期(54～66 d)和灌浆期(67～99 d)末分别破坏性取样,测定根系、土壤有机碳和无机碳的~(13)C含量等指标;自拔节期开始至生育期末,每隔3d测定种植玉米与不种玉米的土壤呼吸CO_2量以及13C-CO_2含量。结果表明,利用IsoSource软件三源区分土壤CO_2的排放,土壤CO_2排放累计量以根源呼吸贡献为主(48.0%),其次为土壤有机碳(31.2%),最小为土壤无机碳(20.8%)。玉米对土壤无机碳与有机碳释放均表现为正根际效应,从拔节期至生育期末,种植玉米土壤有机碳与无机碳的释放分别较不种植土壤多65%和156%。土壤无机碳对于稳定全球碳库和调节大气CO_2浓度具有重要意义,若忽视石灰性土壤无机碳对土壤CO_2释放的贡献,有可能高估土壤有机碳的分解。
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| 关 键 词： | 根际效应 三源区分土壤CO2 土壤有机碳分解 土壤无机碳溶解 根源呼吸 |
| 收稿时间： | 2019/10/30 0:00:00 |
| 修稿时间： | 2020/5/20 0:00:00 |
Rhizosphere Effects of Maize on Inorganic and Organic Carbon Release in Calcareous Soils |
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| SUN Zhaoan,ZHAO Yi,ZHU Biao,CHEN Qing,CAO Hui,HE Minyi and MENG Fanqiao.Rhizosphere Effects of Maize on Inorganic and Organic Carbon Release in Calcareous Soils[J].Acta Pedologica Sinica,2021,58(4). |
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| Authors: | SUN Zhaoan ZHAO Yi ZHU Biao CHEN Qing CAO Hui HE Minyi and MENG Fanqiao |
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| Institution: | Key Laboratory of Biology and Molecular Biology in University of Shandong, College of Biological and Agricultural Engineering, Weifang University,Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University,Institute of Ecology, College of Urban and Environmental Sciences, and Key Laboratory for Earth Surface Processes of the Ministry of Education, Peking University,Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University,Key Laboratory of Biology and Molecular Biology in University of Shandong, College of Biological and Agricultural Engineering, Weifang University,Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University,Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation, College of Resources and Environmental Sciences, China Agricultural University |
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| Abstract: | |
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| Keywords: | Rhizosphere effects Three-source partitioning of soil CO2 Decomposition of soil organic carbon Dissolution of soil inorganic carbon Root-derived respiration |
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