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选取三江平原河滨湿地、沼泽湿地和草甸化湿地3种类型小叶章湿地0~20cm土壤,研究了不同类型湿地土壤总有机碳(TOC)、微生物生物量碳(MBC)、微生物生物量氮(MBN)、基础呼吸(BR)、呼吸势(PR)、微生物熵(Cmic/Corg)和代谢熵(qCO2)变化规律.结果表明,不同类型小叶章湿地土壤总有机碳、微生物生物量碳和基础呼吸分别为46.60~75.44g.kg-1、1106.86~2319.42mg.kg-1和5.72~10.10mg.kg-.1h-1.河滨湿地和沼泽湿地土壤总有机碳、微生物生物量碳、微生物生物量氮、基础呼吸、呼吸势和微生物熵均显著高于草甸化湿地(p<0.01),而河滨湿地和沼泽湿地代谢熵明显低于草甸化湿地(p<0.05).各土壤微生物活性指标在河滨湿地和沼泽湿地间均无明显差异.因而,相对于河滨湿地和沼泽湿地,草甸化湿地土壤微生物活性处于较低水平,土壤总有机碳和水分含量低是限制草甸化湿地土壤微生物活性的重要因素.
Three 0 - 20 cm soils were selected from the three types of C. angustifolia wetlands in Sanjiang Plain wetland, marsh and meadows wetlands. The effects of soil organic carbon (TOC), microbial biomass carbon (MBC), microbial biomass nitrogen (MBN), basal respiration (BR), respiratory potential (PR), Cmic / Corg and qCO2 were calculated.The results showed that total organic carbon and microbial biomass carbon The basal respiration was 46.60-75.44g.kg-1,1106.86- 2319.42mg.kg-1 and 5.72-10.10mg.kg-1h-1, respectively.The total organic carbon and microbial biomass carbon in the riverside and marsh wetlands, Microbial biomass nitrogen, basal respiration, respiration potential and microbial entropy were significantly higher than that of meadow wetland (p <0.01), while the metabolic entropy of riverside wetlands and marsh wetlands was significantly lower than that of meadow wetlands (p <0.05). There was no significant difference in soil microbial activity between the riverside wetlands and the swamp wetlands, so compared with the riverside wetlands and marsh wetlands, the activity of soil microorganisms in the meadow wetlands was at a low level, and the total soil organic carbon and water content were low Important Factors of Soil Microbial Activity in Meadow Wetland .