中文摘要：

在从主要箱子的变化距离的适度的森林表面土壤(例如， Pinus koraiensis 和 Quercus 蒙古人集成通信适配器)被用来学习乙炔的效果( C ₂在氮的硝化作用，矿化作用和土壤的微生物引起的生物资源 N 集中上的低集中的 H ₂)，并且估计不是自养的氮的硝化作用的贡献到氧化亚氮( N ₂ O )从土壤的排出物。在在从 10 ～ 100 Pa C ₂ 在头空间气体的 H ₂ 在 N ₂ 在 c 的土壤潮湿的 O 排放。45% 充满水的孔空间，和减少是几乎在在 C ₂ 在低集中的 H ₂ 。不是自养的氮的硝化作用能说明 21%48% 全部的 N ₂ 从每土壤的 O 排放；贡献将与从 Pinus koraiensis 箱子而非从 Quercus 蒙古人集成通信适配器箱子增加距离增加。在试验性的条件下面， C ₂ 在低集中的 H ₂ 没在土壤上显示出重要影响微生物引起的生物资源 N，网 N 矿化作用和微生物引起的呼吸。然而， 100 Pa C ₂ 在头空间气体的 H ₂ 能减少二氧化碳(从土壤的公司 ₂) 排出物。根据 10 Pa C ₂由为实验室孵化的森林土壤和便利的 H ₂， 50 Pa C ₂在头空间气体的 H ₂能被用来学习 N ₂从在氧气的条件和钥匙下面的森林土壤的 O 排出物联系了开车机制。N ₂ 从在从 Quercus 蒙古人集成通信适配器箱子的一样的距离的土壤的 O 和公司 ₂ 排出物比从 Pinus koraiensis 箱子的那些大，并且当从箱子的距离增加了，两排放减少了。逐步的回归分析证明在土壤公司₂排出物的95%可变性能被说明为由土壤总数 C 和水的集中可溶的器官的 C 和土壤酸碱值，

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 （C2H2） 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=O） emissions from soils. The use of acetylene at partial pressures within a range from 10 to 100 Pa C2H2 in headspace gas gave a significant decrease in N20 emission at soil moisture of c. 45% water-filled porosity space, and the decrease was almost the same in each soil after exposure of C2H2 at low concentrations. Heterotrophic nitrification could account for 21%--48% of total N20 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 C2H2 at low concentrations showed no significant influ- ence on soil microbial biomass N, net N mineralization and microbial respiration. However, 100 Pa C2H2 in headspace gas could reduce carbon dioxide （CO2） emissions from soils. According to the rapid consumption of 10 Pa C2H2 by forest soils and convenience for laboratory incubations, 50 Pa C2H2 in headspace gas can be used to study the origin of N20 emissions from forest soils under aerobic conditions and the key associated driving mechanisms. The N2O and CO2 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 CO2 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 N2O emissions could be accounted for by the concentrations of soil total N, exchangeable NH^＋ 4-N and microbial bio