Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil (SCI)
文献类型：期刊论文
| 作者 | He M. Z.; Dijkstra F. A. |
| 刊名 | Soil Biology & Biochemistry
 |
| 出版日期 | 2015 |
| 卷号 | 82页码:99-106 |
| 英文摘要 | Plants and microbes have limited stoichiometric flexibility to take up and store nitrogen (N) and phosphorus (P). Variation in the relative availability of N and P to plants and microbes may therefore affect how strongly N and P are held in terrestrial ecosystems with important implications for net primary productivity and carbon sequestration. We hypothesized that an increase in P availability in a P-poor soil would increase N uptake by plants and microbes thereby reducing N loss. We grew mixtures of the C3 grass Phalaris aquatica L. and the legume Medicago sativa L. in mesocosms with soils low in P availability and then used a novel technique by adding a N-15 tracer with and without 1 g P m(-2) to soil with different moisture and available N conditions, and measured the N-15 recovery after 48 h in microbes, plants and soil. In contrast to our hypothesis, we found that P addition reduced N-15 in microbes without water stress by 80% and also reduced total N-15 recovery, particularly without water stress. Water stress in combination with N addition further showed low total N-15 recovery, possibly because of reduced plant uptake thereby leaving more N-15 in the soil available for nitrification and denitrification. Our results suggest that P addition can result in large gaseous N loss in P-poor soils, most likely by directly stimulating nitrification and denitrification. (c) 2015 Elsevier Ltd. All rights reserved. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.casnw.net/handle/362004/27700]  |
| 专题 | 寒区旱区环境与工程研究所_中科院寒区旱区环境与工程研究所（未分类）_期刊论文 |
| 推荐引用方式 GB/T 7714 | He M. Z.,Dijkstra F. A.. Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil (SCI)[J]. Soil Biology & Biochemistry,2015,82:99-106. |
| APA | He M. Z.,&Dijkstra F. A..(2015).Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil (SCI).Soil Biology & Biochemistry,82,99-106. |
| MLA | He M. Z.,et al."Phosphorus addition enhances loss of nitrogen in a phosphorus-poor soil (SCI)".Soil Biology & Biochemistry 82(2015):99-106. |
入库方式： OAI收割
来源：寒区旱区环境与工程研究所
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