夏季池塘养殖河蟹生态系统温室气体排放及综合增温潜势

Greenhouse Gases Emissions from Pond Culture Ecosystem of Chinese Crab and Their Comprehensive Global Warming Potentials In Summer

摘要: 为探讨夏季池塘养殖河蟹系统温室气体的排放规律及综合增温潜势，试验采用静态暗箱-气相色谱法对池塘养殖河蟹生态系统温室气体（CO2 、CH4 、N2O）的排放进行原位测定。结果显示，夏季河蟹养殖池塘均表现为CO2 、CH4 和N2O的源，其中CH4夏季排放量达（42.62±9.55～95.09±10.89）g/m2，CO2排放量达（6.91±2.18～12.52±3.11）g/m2，N2O有微弱排放；夏季河蟹池塘保持一定的水生植物覆盖能显著减少CO2/ CH4的排放，较无水草种植区域，减少CO2排放 52.47g/m2，减少CH4排放 5.61 g/m2，对N2O排放无显著性影响；种植水生植物减缓综合温室效应的潜力是不种植水生植物的1.85倍，池塘养殖河蟹生态养殖温室气体减排空间巨大。

Abstract: In order to analyze the seasonal variation characteristics of emissions of CO2 ,CH4 , N2O and evaluate the comprehensive global warming potentials (GWPs),Fluxes of CO2,CH4 and N2O were measured simultaneously from the culture ponds of Chinese mitten crabs by the closed static opaque chamber-GC techniques. The results showed that the pond ecosystem were the sources of CO2