水、盐梯度及外来植物入侵对河口湿地土壤甲烷产生潜力的影响

采用室内厌氧培养法对闽江河口湿地不同水、盐梯度及外来入侵植物互花米草下的湿地土壤甲烷产生潜力进行了测定，结果表明，从0～40cm土层平均甲烷产生潜力看，距海由近到远的蔗草、成草和芦苇湿地甲烷产生潜力分别为0．0204ug／g·d、0．0355ug／g·d和0．0378ug／g·d；近潮沟区和远潮沟区成草和芦苇湿地土壤甲烷产生潜力分别为0．0355ug／g·d和0．0400ug／g·d及0．0378ug／g·d和0．0425ug／g·d，远潮沟区大于近潮沟区，成草湿地低于芦苇湿地；短期入侵（5a～6a）的互花米草斑块土壤平均甲炕产生潜力为0．0329ug／g·d，未明显地提高原有湿地整个土壤剖面的甲烷产生潜力。各研究湿地类型土壤均表现为0～5cm土层甲炕产生潜力最高。图5，表1，参23。

Effects of Water-Salinity Properties and Plant Invasion on Estuarine Wetland Soil Methane Production Potential

Methane production potential of the Min River estuarine wetland under various water-salinity properties and plant invasion were determined using an anaerobic incubation technique. The results showed that the methane production potentials averaged from 0 - 40 cm soil layer of the S.triqueter.C.malaccensis and P.australis wetlands located from sea to bank, were 0.0204 μg/g·d.0.0355μg/g·d and 0.0378μg/g·d respectively. Methane production potentials of C.malaccensis and P.australis wetlands that were near and far from the ditch were 0.0355μg/g·d, 0.0400μg/g·d and 0.0378μg/g·d,0.0425μg/g·d.Methane production potential of exotic plant S.altemiflora was 0.0329μg/g·d,the invasion of S.altemiflora in short term had not enhanced significantly the methane production potential.Moreover,0 - 5 cm soil layer was the most actively one for methane production potential in all the wetlands studied.