施用堆肥污泥对杨树生物量和土壤微生物特性的影响  

Effects of Composted Sewage Sudge on Polar Biomass and Soil Microorganism Characteristics

作　　者：白莉萍 齐洪涛 Bai Liping;Qi Hongtao(Key Laboratory of Forest Ecology and Environment of National Forestry and Grassland Administration,Ecology and Nature Conservation Institute,Chinese Academy of Forestry,Beijing 100091,China)

机构地区：[1]中国林业科学研究院森林生态环境与自然保护研究所,国家林业和草原局森林生态环境重点实验室,北京100091

出　　处：《陆地生态系统与保护学报》2023年第4期23-31,共9页Terrestrial Ecosystem and Conservation

基　　金：中央级公益性科研院所基本科研业务费专项资金项目(CAFYBB2018SZ004)。

摘　　要：【目的】采用田间实验研究施用堆肥污泥对杨树生物量、土壤理化性质及土壤微生物特性的影响,以期为合理利用堆肥污泥提供科学依据。【方法】通过2年田间实验,研究不同堆肥污泥施用量(对照CK、低量LS、中量MS和高量HS)对植物生物量和土壤的营养成分、重金属含量、微生物生物量碳(MBC)、微生物数量、微生物功能多样性的影响。【结果】施用堆肥污泥明显改善土壤营养成分,其中土壤有机碳、有效氮、全氮、全磷含量平均增幅为0.8~2.3倍;堆肥污泥施用亦增加土壤重金属含量,但基本可控。堆肥污泥施用对土壤MBC、微生物数量和群落功能多样性均产生积极影响,尤其土壤MBC和微生物数量平均增幅分别为37.5%~65.7%和32.5%~183.9%。堆肥污泥施用提高杨树地上、根系和整株生物量,平均增幅为38.3%~89.3%。【结论】施用堆肥污泥不仅能改善土壤理化性质和微生物环境,而且能提高杨树的生物量,堆肥污泥每年最佳用量为15 t/hm^(2)。【Objective】In this study,a field trial was conducted to determine the poplar biomass,the physico-chemical properties and microorganism characteristics in soil amended with composted sewage sludge(CSS),in order to provide the scientific basis for the circulation of CSS.【Method】Two-year field trial was conducted to determine the effects of different amounts of CSS on the plant biomass and the soil nutrients,heavy metal contents,microbial biomass carbon(MBC),microbial population,microbial functional diversity.Soil was amended with one of four CSS treatments in both study years:control,LS,MS,and HS.【Result】The application of CSS significantly improved the soil nutrients,and the soil organic carbon,available N,total N and total P contents increased by 0.8~2.3 times on average.The CSS application also increased the heavy metal contents in soil,but the heavy metal pollution was controllable.The CSS application had positive effects on the soil MBC,microbial population and community functional diversity,especially the soil MBC and microbial population.In particular,the soil MBC and microbial population increased by 37.5%~65.7%and 32.5%~183.9%,respectively.The CSS application increased the aboveground,root and whole plant biomass of poplar with an average increase of 38.3%to 89.3%.【Conclusion】In summary,the application of CSS not only improves the soil physico-chemical properties and microbial environment,but also promotes the plant biomass.And the optimal amount of CSS is 15 t/hm^(2)per year.

关 键 词：堆肥污泥 土壤营养 重金属 生物量 

分 类 号：X705[环境科学与工程—环境工程]