Phosphorus addition mitigates N2O and CH4 emissions in N-saturated subtropical forest, SW China
文献类型：期刊论文
| 作者 | Wang, Yihao; Yu, Longfei; Dorsch, Peter; Mulder, Jan; Zhang, Xiaoshan |
| 刊名 | BIOGEOSCIENCES
 |
| 出版日期 | 2017-06-23 |
| 卷号 | 14期号:12页码:3097-3109 |
| 关键词 | N2o No Flood Irrigation Drip Fertigation Dcd Nitrapyrin |
| 英文摘要 | Chronically elevated nitrogen (N) deposition has led to severe nutrient imbalance in forest soils. Particularly in tropical and subtropical forest ecosystems, increasing N loading has aggravated phosphorus (P) limitation of biomass production, and has resulted in elevated emissions of nitrous oxide (N2O) and reduced uptake of methane (CH4), both of which are important greenhouse gases. Yet, the interactions of N and P and their effects on greenhouse gas emissions remain elusive. Here, we report N2O and CH4 emissions together with soil N and P data for a period of 18 months following a single P addition (79 kg P ha(-1), as NaH2PO4 powder) to an N-saturated, Masson pine-dominated forest soil at TieShanPing (TSP), Chongqing, south-western (SW) China. We observed a significant decline in both nitrate (NO3-) concentrations in soil water (5 and 20 cm depths) and in soil N2O emissions, following P application. We hypothesise that enhanced N uptake by plants in response to P addition, resulted in less available NO3- for denitrification. By contrast to most other forest ecosystems, TSP is a net source of CH4. P addition significantly decreased CH4 emissions and turned the soil from a net source into a net sink. Based on our observation and previous studies in South America and China, we believe that P addition relieves N inhibition of CH4 oxidation. Within the 1.5 years after P addition, no significant increase of forest growth was observed and P stimulation of forest N uptake by understorey vegetation remains to be confirmed. Our study indicates that P fertilisation of N-saturated, subtropical forest soils may mitigate N2O and CH4 emissions, in addition to alleviating nutrient imbalances and reducing losses of N through NO3- leaching. |
| 源URL | [http://ir.rcees.ac.cn/handle/311016/39176]  |
| 专题 | 生态环境研究中心_大气环境科学实验室 |
| 推荐引用方式 GB/T 7714 | Wang, Yihao,Yu, Longfei,Dorsch, Peter,et al. Phosphorus addition mitigates N2O and CH4 emissions in N-saturated subtropical forest, SW China[J]. BIOGEOSCIENCES,2017,14(12):3097-3109. |
| APA | Wang, Yihao,Yu, Longfei,Dorsch, Peter,Mulder, Jan,&Zhang, Xiaoshan.(2017).Phosphorus addition mitigates N2O and CH4 emissions in N-saturated subtropical forest, SW China.BIOGEOSCIENCES,14(12),3097-3109. |
| MLA | Wang, Yihao,et al."Phosphorus addition mitigates N2O and CH4 emissions in N-saturated subtropical forest, SW China".BIOGEOSCIENCES 14.12(2017):3097-3109. |
入库方式： OAI收割
来源：生态环境研究中心
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