欢迎您！东篱公司
退出
-
申报数据库
-
立项数据库
-
成果数据库
-
项目获奖数据库
中文摘要：
用盆栽法对小叶章不同生长阶段土壤CH4氧化能力随时间变化进行了研究.结果表明,氮输入后,植物各生长阶段的CH4氧化率均随时间推移发生了明显的波动变化.从生长季（6月7日～8月24日）CH4氧化率均值来看,只有12g/m^2处理对CH4氧化起促进作用,且12g/m^2和24g/m^2处理之间存在显著性差异（n=4,P〈0.05）.不同氮输入水平对植物不同生长阶段CH4氧化率影响明显.第一阶段（6月7日～7月2日）适量（6g/m^2）氮输入对CH4氧化起促进作用,但过量（12g/m^2）氮输入则起抑制作用.第二阶段（7月2日～7月20日）只有12g/m^2处理起促进作用.第三（7月20日～8月7日）、四（8月7日～8月24日）阶段氮输入对CH4氧化起抑制作用.氮输入后,土壤微生物量碳（MBC）、土壤微生物量氮（MBN）、土壤基础呼吸（BR）、土壤代谢熵（qCO2）、土壤诱导呼吸（SIR）、铵态氮（NH4^＋-N）、硝态氮（NO3^--N）和植物地上生物量与土壤CH4氧化的动态关系存在差异.土壤CH4氧化仅与MBC呈极显著负相关（P〈0.01）,与其他影响因子相关性较小.
英文摘要：
The abilities of CH_4 oxidation changing with time were studied by using pot-culture method at different growth stages of D.angustifolia.The time variation of CH_4 oxidation rate showed smart volatility after nitrogen input at each growth phase.From the perspective of the mean CH_4 oxidation rate of growing season（June 7～August 24）,only the medial nitrogen level promoted CH_4 oxidation,and there existed significant differences between medial and high nitrogen level（n=4,P0.05）.The effect of different nitrogen input level on the CH_4 oxidation rate was obvious at different growth stages.The first stage,moderate nitrogen input promoted CH_4 oxidation,but excessive nitrogen input suppressed CH_4 oxidation.The second phase,only medial nitrogen level promoted CH_4 oxidation.The third and fourth stages, nitrogen input both suppressed CH_4 oxidation.After nitrogen inputted,there were differences in dynamic relationships between soil microbial biomass C and N（MBC,MBN）,soil basic respiration（BR）,soil metabolic quotient（qCO_2）,soil induced respiration（SIR）,ammonium nitrogen（NH_4~＋-N）,nitrate nitrogen（NO_3~--N）,plant biomass and CH_4 oxidation. Through correlative analysis,CH_4 oxidation was significantly related to MBC（P0.01）.
同期刊论文项目
同项目期刊论文
Effects of inorganic nitrogen and phosphorus enrichment on the emission of N2O from a freshwater mar
Ecosystem-atmosphere exchange of CH4 and N2O and ecosystem respiration in wetlands in the Sanjiang P
Impact of natural wetland degradation on dissolved carbon dynamics in the Sanjiang Plain, Northeaste
Effects of land use on soil water soluble organic C and microbial biomass C concentrations in the Sa
Short-term Effect of Nitrogen Addition on Litter and Soil Properties in Calamagrostis angustifolia F
Effects of nitrogen addition, temperature and physical protection on first-phase decomposition of so
Short-term effects of nitrogen addition and vegetation removal on soil chemical and biological prope
Effect of nitrogen addition on decomposition of Calamagrostis angustifolia litters from freshwater m
Impacts of mire reclamation on dynamics of dissolved nutrients in fluvial systems in the Sanjiang Pl
Effects of permafrost thaw on carbon emissions under aerobic and anaerobic environments in the Great
Impacts of natural wetland degradation on dissolved carbon dynamics in the Sanjiang Plain, Northeast
Net exchanges of CO2, CH4 and N2O between marshland and the atmosphere in Northeast China as influen
Dissolved organic carbon characteristics in surface ponds from contrasting wetland ecosystems: a cas
Effects of water table changes on soil CO2, CH4 and N2O fluxes during the growing season in freshwat
Short-term Effects of Nitrogen Additions and Increased Temperature on Wetland Soil Respiration, Sanj
Temperature sensitivity of carbon dioxide production in aggregates and their responses to nitrogen a
Integrating AVHRR and MODIS data to monitor NDVI changes and their relationships with climatic param
Variation of soil enzyme activities and correlations with labile organic carbon fractions in differe
Effects of reclamation of natural wetlands to a rice paddy on dissolved carbon dynamics in the Sanji
Changes in labile soil organic carbon fractions in wetland ecosystems along a latitudinal gradient i
Selecting Sites for Converting Farmlands to Wetlands in the Sanjiang Plain, Northeast China, Based o
Response of leaf, sheath and stem nutrient resorption to 7 years of N addition in freshwater wetland
Hydroponic Uptake and Distribution of Nitrobenzene in Phragmites Australis: Potential for Phytoremed
Effects of exogenous phosphorus addition on soil respiration in Calamagrostis angustifolia freshwate
Changes in Labile Organic Carbon Fractions and Soil Enzyme Activities after Marshland Reclamation an
Greenhouse gas emissions from southward transplanted wetlands during freezing-thawing periods in Nor
Shrinkage and fragmentation of marshes in the West Songnen Plain, China, from 1954 to 2008 and its p
期刊信息
位置：