模拟雪被变化下三江平原湿地土壤理化性质的动态响应  

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

作　　者：柴春荣 倪红伟[3] 刘赢男 张荣涛[2] 杨基先[1] Chai Chunrong;Ni Hongwei;Liu Yingnan;Zhang Rongtao;Yang Jixian(School of Environment,Harbin Institute of Technology,Harbin 150080;Institute of Nature and Ecology,Heilongjiang Academy of Sciences,Harbin 150040;Heilongjiang Academy of Forestry,Harbin 150080)

机构地区：[1]哈尔滨工业大学,哈尔滨150080 [2]黑龙江省科学院自然与生态研究所,哈尔滨150040 [3]黑龙江省林业科学院,哈尔滨150080

出　　处：《中国农学通报》2021年第5期31-37,共7页Chinese Agricultural Science Bulletin

基　　金：国家自然科学基金项目“雪被对三江平原湿地土壤CO2排放的影响及其时滞效应”(31670489);黑龙江省自然科学基金项目“三江平原湿地微生物群落结构对雪被的响应及其与水热因子的协同关系”(LH2019C076);黑龙江省科学院杰出青年基金项目“模拟氮沉降下三江平原小叶章湿地凋落物对温室气体排放的调节机制”(CXZQ2019ZR01)。

摘　　要：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个雪被添加处理均显著增加了土壤可溶性有机碳含量;W3000和W6000处理均显著增加了土壤铵态氮含量;W6000处理显著降低了土壤硝态氮含量;不同雪被处理对土壤全磷和速效磷均未产生显著影响;W1200处理显著的增加了土壤微生物量碳,而W6000处理显著的降低了土壤微生物量碳;W1200处理显著的增加了土壤微生物量氮,W3000处理显著的降低了土壤微生物量氮。不同雪被处理下土壤温度是土壤理化性质变化的主要影响因子。不同雪被处理会改变冻融期土壤理化性质,进而对湿地生态系统碳氮循环产生重要影响。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.

关 键 词：三江平原 小叶章湿地 雪被 土壤理化性质 土壤温度 

分 类 号：S153.6[农业科学—土壤学]