模拟雪被变化下三江平原湿地土壤理化性质的动态响应

为了研究不同雪被处理下土壤温度变化对土壤理化性质影响的动态贡献,采集三江平原小叶章湿地原状土样品,通过室内模拟实验对4个雪被处理W0(31.05％)、W1200(42.66％)、W3000(51.21％)和W6000(76.66％)下的土壤理化性质进行检测.结果表明:W6000处理显著的增加了土壤pH;3个雪被添加处理...

Dynamic Response of the Soil Physical and Chemical Properties Under Simulated Snow Cover in the Sanjiang Plain

To study the dynamic response of soil physical and chemical properties to temperature changes under different snow treatments, soil samples from the Calamagrostis angustifolia wetland in the Sanjiang Plain were collected, and four snow treatments W0 (31.05%), W1200 (42.66%), W3000 (51.21%) and W6000 (76.66%) were simulated in the laboratory, and soil physical and chemical properties were tested. The results showed that the treatment of W6000 significantly increased soil pH; the three snow treatments significantly increased the content of soil soluble organic carbon; the treatment of W3000 and W6000 significantly increased the content of soil ammonium nitrogen; the treatment of W6000 significantly reduced the soil nitrate nitrogen content; different snow treatments had no significant effect on soil total phosphorus and available phosphorus; W1200 treatment significantly increased soil microbial biomass carbon, while W6000 treatment significantly reduced soil microbial biomass carbon; W1200 treatment significantly increased soil microbial biomass nitrogen, W3000 treatment significantly reduced soil microbial biomass nitrogen. Soil temperature under different snow treatments was the main influencing factor for the change of soil physical and chemical properties. Different snow treatments would change the physical and chemical properties of the soil during the freezing and thawing period, which had an important impact on the carbon and nitrogen cycle of the wetland ecosystem.