对比研究新/老生物炭对稻田土壤葡萄糖激发效应及微生物活性的影响

发布时间：2021-10-26 23:48

　　生物炭（BC）对于水稻土壤有机质（SOM）分解的相关影响研究十分有限。本研究旨在研究水稻土中添加新/老生物炭后对葡萄糖的激发效应的影响。试验共设置十六个处理。在室内培养开始前,采集未施加与施加生物炭一年后的田间土壤作为试验样品。实验处理有:不施加生物炭的空白对照处理:control;施加老生物炭处理:aged-BC;同时施加老/新生物炭处理:A/F-BC;施加新生物炭处理:fresh-BC,各处理在施加或不施加14C标记的葡萄糖条件下调节土壤水分进行培养试验,土壤水分条件分为湿润和淹水两种状态。与对照相比,老生物炭土壤CO₂排放量相对较高（平均26%）,而新生物炭的添加降低了新生物炭土壤和新+老生物炭土壤CO₂的排放量,分别为23和21%。在湿润和淹水条件下,老生物炭增加了微生物数量,β葡萄糖苷性,木聚糖酶和纤维二糖水解酶酶潜势,而在淹水条件下新生物炭处理降低了微生物量和酶潜势。在湿润和淹水条件下,对照组添加葡萄糖后出现成正激发效应,分别为58和102μg C g-1。新生物炭处理中葡萄糖的添加也导致正激发效应,在湿润和淹水条件下分别为34和... 

【文章来源】：南京农业大学江苏省 211工程院校 教育部直属院校

【文章页数】：50 页

【学位级别】：硕士

【文章目录】：
ABBREVIATION
ABSTRACT
摘要
Chapter 1: Literature review
    1.1 The importances of biochars in agriculture and climate change
    1.2 The stability and decomposition of biochar in various
    1.3 The mineralization of LOM in biochar amended soil
    1.4 Different function of fresh and aged biochars in soil
    1.5 Objectives and hypothesis
Chapter 2: Materials and methods
    2.1 Soil sampling and preparation
    2.2 Experimental design and treatments
    2.3 Incubation and sampling
    2.4 Microbial biomass and DOC measurement
    2.5 Enzyme assays
    2.6 Chemical and isotopic analyses
    2.7 Calculations and statistical analysis
Chapter 3: The effects of aged and fresh biochars on glucose-induced priming and microbialactivities in paddy soil
    3.1 Soil CO_2 efflux
    3.2 Glucose decomposition
    3.3 Microbial biomass and DOC
    3.4 Enzyme activity (V_(max))
    3.5 PEs
Chapter 4: Discussion
    4.1 Effect of BC addition on the total CO_2 efflux
    4.2 Effect of BC addition on glucose mineralization
    4.3 Effects of BC addition on microbial biomass
    4.4 Effects of BC addition on enzyme activities
    4.5 Effects of BC addition on PEs
    4.6 Effects of water regime on the total CO_2 efflux and PE
Chapter 5: Conclusions
References
ACKNOWLEDGEMENTS
CURRICULUM VITAE


【参考文献】：
期刊论文
[1]试论我国农业和农村有机废弃物生物质碳产业化[J]. 潘根兴,林振衡,李恋卿,张阿凤,郑金伟,张旭辉.  中国农业科技导报. 2011(01)



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