Inhibition experiments on nitrous oxide emission from paddy soils
文献类型：期刊论文
| 作者 | Xu, XK ; Boeckx, P ; Zhou, LK ; Van Cleemput, O |
| 刊名 | GLOBAL BIOGEOCHEMICAL CYCLES
 |
| 出版日期 | 2002 |
| 卷号 | 16期号:3页码:- |
| 关键词 | anthropogenic effects global change biogeochemical cycles nutrients nutrient cycling |
| ISSN号 | 0886-6236 |
| 通讯作者 | Xu, XK, Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China |
| 中文摘要 | [1] Rice fields using nitrogen-based fertilizers play an important role in the global N2O budget. However, our knowledge is still limited with regard to the mechanisms affecting the N2O emission and to the measures that can reduce the emission. This paper reports a study of N2O emission from paddy soils. The effects of urea, hydroquinone (HQ, a urease inhibitor), and dicyandiamide (DCD, a nitrification inhibitor) have been studied in pot experiments with and without rice plants and with and without addition of wheat straw. With no wheat straw amendment, all treatments with inhibitors, especially with HQ + DCD, had a much smaller N2O emission during the rice growing period than the urea treatment, whereas a substantially increased N2O emission was observed from a rice-free soil with inhibitors. The N2O emission from the rice-planted soil was exponentially positive correlated with the NO3--N concentration in the rice aboveground biomass. By comparing the total N2O emission from the rice-free soil and from the rice-planted soil, we found that urea application alone might induce an apparent plant-mediated N2O emission, being 0.39 +/- 0.08% of the applied urea N. Wheat straw incorporated into the flooded surface layer soil could increase the plant-mediated N2O emission significantly. However, application of HQ + DCD could reduce this emission (0.27 +/- 0.08% of the applied urea N, compared with 0.89 +/- 0.18% in the urea treatment). It also reduced the N2O emission from the rice-free soil and from the rice-planted soil. Stepwise regression analysis indicates that denitrification in the flooded surface layer soil was the main source of N2O emission from this wetland rice cultivation, particularly when wheat straw was added. A significantly nonlinear negative relation was found between the N2O emission and the CH4 emission when no wheat straw was added, but it was hard to quantify this trade-off relation when wheat straw was incorporated into the flooded surface layer soil. |
| 学科主题 | Environmental Sciences; Geosciences, Multidisciplinary; Meteorology & Atmospheric Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000179008700002 |
| 公开日期 | 2011-09-23 |
| 源URL | [http://210.72.129.5/handle/321005/55457]  |
| 专题 | 沈阳应用生态研究所_沈阳应用生态研究所_期刊论文 |
| 推荐引用方式 GB/T 7714 | Xu, XK,Boeckx, P,Zhou, LK,et al. Inhibition experiments on nitrous oxide emission from paddy soils[J]. GLOBAL BIOGEOCHEMICAL CYCLES,2002,16(3):-. |
| APA | Xu, XK,Boeckx, P,Zhou, LK,&Van Cleemput, O.(2002).Inhibition experiments on nitrous oxide emission from paddy soils.GLOBAL BIOGEOCHEMICAL CYCLES,16(3),-. |
| MLA | Xu, XK,et al."Inhibition experiments on nitrous oxide emission from paddy soils".GLOBAL BIOGEOCHEMICAL CYCLES 16.3(2002):-. |
入库方式： OAI收割
来源：沈阳应用生态研究所
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