Soil respiration is an important source of atmospheric CO2 and has an important impact on global climate change.In this study,it examined the effects of Kandelia obovata(K.obovata)mangrove substitution for Spartina alterniflora(S.alterniflora)on soil respiration rate by taking the wetland soil of S.alterniflora and restored K.obovata mangrove of Minjiang River Estuary after treatment as research objects.The results showed that the soil respiration rate of S.alterniflora and K.obovata mangrove showed a single peak occurring in summer with obvious seasonal variation trend.The replacement of S.alterniflora by K.obovata mangrove did not change the seasonal variation trend of soil respiration rate,but significantly reduced the soil respiration rate(p＜0.05).The soil respiration rate was significantly positively correlated with air temperature and soil temperature(p＜0.01),and significantly negatively correlated with water content(p＜0.01).The soil respiration rate of S.alterniflora was negatively correlated with air humidity,which was the same as that of K.obovata mangrove with soil pH(p＜0.01).
soil respiration rateKandelia obovata mangroveSpartina alternifloraMinjiang River Estuary
万方数据
维普
