Effects of acetylene at low concentrations on nitrification, mineralization and microbial biomass nitrogen concentrations in forest soils
文献类型：期刊论文
| 作者 | Zhang TengYu1,2; Xu XingKai1; Luo XianBao1,3; Han Lin1,3; Wang YingHong1; Pan GenXing2 |
| 刊名 | Chinese science bulletin
 |
| 出版日期 | 2009 |
| 卷号 | 54期号:2页码:296-303 |
| 关键词 | Heterotrophic nitrification Forest soil Acetylene Mineralization Microbial biomass nitrogen |
| ISSN号 | 1001-6538 |
| DOI | 10.1007/s11434-008-0470-7 |
| 通讯作者 | Xu xingkai(xingkai_xu@yahoo.com.cn) |
| 英文摘要 | Temperate forest surface soils at the varying distances from main trunks (e.g., pinus koraiensis and quercus mongolica) were used to study the effects of acetylene (c(2)h(2)) at low concentrations on nitrification, mineralization and microbial biomass n concentrations of the soils, and to assess the contribution of heterotrophic nitrification to nitrous oxide (n(2)o) emissions from soils. the use of acetylene at partial pressures within a range from 10 to 100 pa c(2)h(2) in headspace gas gave a significant decrease in n(2)o emission at soil moisture of c. 45% water-filled porosity space, and the decrease was almost the same in each soil after exposure of c(2)h(2) at low concentrations. heterotrophic nitrification could account for 21%-48% of total n(2)o emission from each soil; the contribution would increase with increasing distances from the pinus koraiensis trunks rather than from the quercus mongolica trunks. under the experimental conditions, the use of c(2)h(2) at low concentrations showed no significant influence on soil microbial biomass n, net n mineralization and microbial respiration. however, 100 pa c(2)h(2) in headspace gas could reduce carbon dioxide (co(2)) emissions from soils. according to the rapid consumption of 10 pa c(2)h(2) by forest soils and convenience for laboratory incubations, 50 pa c(2)h(2) in headspace gas can be used to study the origin of n(2)o emissions from forest soils under aerobic conditions and the key associated driving mechanisms. the n(2)o and co(2) emissions from the soils at the same distances from the quercus mongolica trunks were larger than those from the pinus koraiensis trunks, and both emissions decreased as the distances from trunks increased. the stepwise regression analysis showed that 95% of the variability in soil co(2) emissions could be accounted for by the concentrations of soil total c and water soluble organic c and soil ph, and that 72% of the variability in soil n(2)o emissions could be accounted for by the concentrations of soil total n, exchangeable nh(4) (+)-n and microbial biomass n and 25% of the variability in heterotrophic nitrification by the soil microbial biomass n concentration. the emissions of n(2)o and co(2) from forest soils after exposure of c(2)h(2) at low concentrations were positively related to the net nitrification of the soils. |
| WOS关键词 | HETEROTROPHIC NITRIFICATION ; POOL DILUTION ; N2O ; TRANSFORMATIONS ; INCUBATION ; EXTRACTION ; EXPOSURE ; RATES ; CH4 |
| WOS研究方向 | Science & Technology - Other Topics |
| WOS类目 | Multidisciplinary Sciences |
| 语种 | 英语 |
| WOS记录号 | WOS:000263128500017 |
| 出版者 | SCIENCE PRESS |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2395331 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Xu XingKai |
| 作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, State Key Lab Atmospher Boundary Layer Phys & Atm, Beijing 100029, Peoples R China 2.Nanjing Agr Univ, Inst Resource Ecosyst & Environm Agr, Nanjing 210095, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang TengYu,Xu XingKai,Luo XianBao,et al. Effects of acetylene at low concentrations on nitrification, mineralization and microbial biomass nitrogen concentrations in forest soils[J]. Chinese science bulletin,2009,54(2):296-303. |
| APA | Zhang TengYu,Xu XingKai,Luo XianBao,Han Lin,Wang YingHong,&Pan GenXing.(2009).Effects of acetylene at low concentrations on nitrification, mineralization and microbial biomass nitrogen concentrations in forest soils.Chinese science bulletin,54(2),296-303. |
| MLA | Zhang TengYu,et al."Effects of acetylene at low concentrations on nitrification, mineralization and microbial biomass nitrogen concentrations in forest soils".Chinese science bulletin 54.2(2009):296-303. |
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来源：中国科学院大学
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