| Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation | |
| Hang Jing1; Ying Liu1,2; Guoliang Wang1,2 | |
| 2021 | |
| 发表期刊 | Science of the Total Environment
 |
| 卷号 | 780期号:1页码:1-11 |
| 摘要 | Nitrogen (N) addition has variable effects on chemical composition, function, and turnover of roots with different
diameters. However, it is unclear whether N addition has variable effects on greenhouse gas (GHG) emission in
rhizosphere soil. We performed N addition (0–9gNm−2 y−1 ) experiment in a Pinus tabulaeformis forest and a
lab-incubation experiment to determine the effects of N addition on carbon dioxide (CO2), nitrous oxide
(N2O), and methane (CH4) emissions in rhizosphere soils of roots with different diameters (very fifine roots:
<0.5 mm, intermediate fifine roots: 0.5–1.0 mm, largest fifine roots: 1.0–2.0 mm). Nitrogen addition signifificantly
promoted CO2 emission and CH4 uptake, with maximum values (CO2, 623.15 mg C kg soil−1 ; CH4, 1794.49 μg
C kg soil−1 ) in the 6 or 9 g N m−2 y−1 treatments (P < 0.05). Nitrous oxide emissions were inhibited, with the
greatest inhibitory effect in the 9 g N m−2 y−1 treatment (48.63 μg N kg soil−1 ). Total phosphorus (TP) content
signifificantly decreased and increased in rhizosphere soil and non-rhizosphere soil after N addition, respectively,
while organic carbon (OC), total N (TN), ammonium (NH4+), and nitrate (NO3−) contents in rhizosphere soil in
creased. A greater change in chemical properties occurred in rhizosphere soil of largest fifine roots than very
fifine roots. Carbon dioxide and nitrous oxide emissions in rhizosphere soil among root sizes exhibited similar re
sponses to N addition. While CH4 uptake was more responsive to N addition in rhizosphere soil with very fifine
roots than with largest fifine roots. Basically, OC, TN, NO3−, and NH4+ were key soil components driving GHG emis
sions; NO3− promoted CH4 uptake and N2O emissions, NH4+ inhibited CO2 emissions. GHG response to N addition
varied greatly, particularly in rhizosphere soil with different root sizes mainly related to its chemical properties. |
| 收录类别 | 中文核心期刊要目总览 |
| 文献类型 | 期刊论文 |
| 条目标识符 | sbir.nwafu.edu.cn/handle/361005/10601 |
| 专题 | 水保所知识产出(1956---) |
| 作者单位 | 1.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University 2.Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resources |
| 推荐引用方式 GB/T 7714 | Hang Jing,Ying Liu,Guoliang Wang. Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation[J]. Science of the Total Environment,2021,780(1):1-11. |
| APA | Hang Jing,Ying Liu,&Guoliang Wang.(2021).Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation.Science of the Total Environment,780(1),1-11. |
| MLA | Hang Jing,et al."Contrasting effects of nitrogen addition on rhizosphere soil CO2, N2O, and CH4 emissions of fine roots with different diameters from Pinus tabulaeformis forest using laboratory incubation".Science of the Total Environment 780.1(2021):1-11. |
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