Abstract:The abilities of CH4 oxidation changing with time were studied by using pot-culture method at different growth stages of D.angustifolia. The time variation of CH4 oxidation rate showed smart volatility after nitrogen input at each growth phase. From the perspective of the mean CH4 oxidation rate of growing season (June 7~August 24), only the medial nitrogen level promoted CH4 oxidation, and there existed significant differences between medial and high nitrogen level (n = 4, P < 0.05). The effect of different nitrogen input level on the CH4 oxidation rate was obvious at different growth stages. The first stage, moderate nitrogen input promoted CH4 oxidation, but excessive nitrogen input suppressed CH4 oxidation. The second phase, only medial nitrogen level promoted CH4 oxidation. The third and fourth stages, nitrogen input both suppressed CH4 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 (qCO2), soil induced respiration (SIR), ammonium nitrogen (NH4+-N), nitrate nitrogen (NO3--N), plant biomass and CH4 oxidation. Through correlative analysis, CH4 oxidation was significantly related to MBC (P < 0.01).
收稿日期: 2009-12-14
引用本文:
葛瑞娟, 宋长春, 侯翠翠, 杨桂生, 李英臣. 氮输入对小叶章不同生长阶段土壤CH4氧化的影响[J]. 中国环境科学, 2010, 30(8): 1097-1102.
GE Rui-Juan, SONG Chang-Chun, HOU Cui-Cui, YANG Gui-Sheng, LI Ying-Chen. Effects of exogenous nitrogen on methane oxidation at different plant growth phase from Deyeuxia angustifolia marsh.. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(8): 1097-1102.