Isotopic signatures and concentration profiles of nitrous oxide in a rice-based ecosystem during the drained crop-growing season
文献类型：期刊论文
| 作者 | Xiong, Z. Q.1,2; Khalil, M. A. K.2; Xing, G.3; Shearer, M. J.2; Butenhoff, C.2 |
| 刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
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| 出版日期 | 2009-05-15 |
| 卷号 | 114页码:10 |
| ISSN号 | 0148-0227 |
| DOI | 10.1029/2008JG000827 |
| 通讯作者 | Xiong, Z. Q.(zqxiong@njau.edu.cn) |
| 英文摘要 | The stable isotopic composition of nitrous oxide (N(2)O) in agricultural soils can improve our understanding of the relative contributions of the main microbial processes (nitrification and denitrification) responsible for N(2)O formation in soils, and can provide constraints for the atmospheric N(2)O budget. Here, we present soil profiles featuring N(2)O concentrations and delta(15)N and delta(18)O values in N(2)O over time, which permit the in situ identification of processes and sites of N(2)O production in a rice-based ecosystem seeded with winter wheat. Our delta(15)N and delta(18)O soil profile values support the conclusion that denitrification is the dominant process behind N(2)O production during the winter wheat season. The soil N(2)O gas concentrations are higher below 10 cm than above 10 cm, and more depleted in (15)N-N(2)O at 10-15 cm depth compared to other soil depths, which indicates that the N(2)O production zone is located at a depth of 10-15 cm within 0-20 cm. The delta(15)N(air) and delta(18)O(SMOW) (delta(18)O of standard mean ocean water) values for soil gas N(2)O averaged over the entire wheat growing season are + 0.90 +/- 2.9 (n = 64) and + 39.3 +/- 3.1 (n = 64), respectively. Given that paddy source N(2)O is much heavier in both measured (15)N and (18)O compared to other fertilized soils, agricultural soils have been underestimated as a source of N(2)O since isotopic constraints from rice agriculture have not been taken into account. |
| 收录类别 | SCI |
| WOS关键词 | TEMPERATE GRASSLAND SOIL ; GLOBAL N2O BUDGET ; POPULATION-GROWTH ; STABLE-ISOTOPES ; NORTH PACIFIC ; FOREST SOILS ; ARABIAN SEA ; ICE CORE ; DENITRIFICATION ; EMISSIONS |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology |
| WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000266100400001 |
| 出版者 | AMER GEOPHYSICAL UNION |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2558798 |
| 专题 | 南京土壤研究所 |
| 通讯作者 | Xiong, Z. Q. |
| 作者单位 | 1.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Peoples R China 2.Portland State Univ, Dept Phys, Portland, OR 97207 USA 3.Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xiong, Z. Q.,Khalil, M. A. K.,Xing, G.,et al. Isotopic signatures and concentration profiles of nitrous oxide in a rice-based ecosystem during the drained crop-growing season[J]. JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,2009,114:10. |
| APA | Xiong, Z. Q.,Khalil, M. A. K.,Xing, G.,Shearer, M. J.,&Butenhoff, C..(2009).Isotopic signatures and concentration profiles of nitrous oxide in a rice-based ecosystem during the drained crop-growing season.JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES,114,10. |
| MLA | Xiong, Z. Q.,et al."Isotopic signatures and concentration profiles of nitrous oxide in a rice-based ecosystem during the drained crop-growing season".JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES 114(2009):10. |
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来源：南京土壤研究所
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