施肥对土壤动物群落的影响：野外实验和Meta分析
发布时间：2025-02-06 14:10
土壤动物在土壤的形成、维持生态系统功能等方面起着重要的作用,受到施肥等人类活动的影响。然而,人们关于施肥对土壤动物群落的具体影响仍然缺乏深刻的认识。关于栖息地的变化和食物资源的改变对调控土壤动物对施肥响应的相对贡献的争论仍在继续。因此,本人通过野外实验探讨了N肥添加对土壤动物群落的影响及其主导调控因素,并且通过meta分析来探索土壤动物群落在全球尺度上对施肥的响应及其调控因素。在第一项研究中（野外实验,第二章）,本人在中国东部杨树人工林（Populus deltoids）中,通过模拟N沉降(0,50,100,150以及300 kg N ha-1 year-1)实验,探讨了总的土壤动物以及植食性土壤动物群落在不同土层（0-10,10-25和25-40 cm）对N添加的响应。我们将不同施N水平所需的NH4NO3溶解于水中,采用背负式喷雾器将其均匀洒入样地来模拟N沉降。我们的结果表明:低浓度的N添加显著增加了总土壤动物和植食性土壤动物密度(Dtotal和Dp),高...
【文章页数】：76 页
【学位级别】：硕士
【文章目录】：
Acknowledgements
摘要
abstract
Chapter1 Introduction
1.1 Function of soil fauna in ecosystems
1.2 Effects of fertilization on soil fauna community
Chapter2 Fine Root Biomass Mediates Soil Fauna Community in Response to N Addition in Poplar Plantations(Populus deltoids)on the East Coast of China
2.1 Introduction
2.2 Materials and Methods
2.2.1 The Experimental Site and Design
2.2.2 Microclimate
2.2.3 Measurement of C and N in Litter and Soil Samples
2.2.4 Estimation of Fine Root Biomass
2.2.5 Soil Fauna Sampling and Identification
2.2.6 Statistical Analysis
2.3 Results
2.3.1 Microclimate,Litter C and N,Soil Samples,and Fine Root Biomass
2.3.2 Soil Fauna Community as Affected by N Addition
2.3.3 Fine Root Biomass Regulation of Soil Fauna Density
2.4.Discussion
2.4.1 N-addition Impacts on Soil Fauna Density
2.4.2 N-addition Impacts on the Number of Groups and Diversity of Soil Fauna
2.4.3 Increasing N-Addition Thresholds along Soil Profile
2.4.4 Regulation of Fine Root Biomass on Soil Fauna
Chapter3 Effects of fertilization on soil fauna community:a meta-analysis
3.1 Introduction
3.2 Methods
3.2.1 Data collection
3.2.2 Data analysis
3.3 Results
3.3.1 The average effects of fertilization on soil and microbial attributes
3.3.2 The variation of fertilization effects on soil fauna abundance
3.3.3 Influence of fertilizer types on soil fauna abundance among ecosystem types
3.3.4 Influence of fertilizer types on soil fauna abundance among climate zones
3.3.5 Influence of fertilization on the group number and diversity of soil fauna community
3.3.6 Measuring correlations of soil fauna community with soil and microbial characteristics
3.4 Discussion
3.4.1 Overall effect of fertilization on soil fauna abundance
3.4.2 Overall effect of fertilization on group number and diversity of soil fauna
3.4.3 Influence of experimental and geographic factors on soil fauna abundance
3.4.4 Regulation of microbe on soil fauna
Chapter4 Conclusions and Future Perspectives
4.1 Conclusions
4.2 Future perspectives
Publications
References
本文编号：4030487
【文章页数】：76 页
【学位级别】：硕士
【文章目录】：
Acknowledgements
摘要
abstract
Chapter1 Introduction
1.1 Function of soil fauna in ecosystems
1.2 Effects of fertilization on soil fauna community
Chapter2 Fine Root Biomass Mediates Soil Fauna Community in Response to N Addition in Poplar Plantations(Populus deltoids)on the East Coast of China
2.1 Introduction
2.2 Materials and Methods
2.2.1 The Experimental Site and Design
2.2.2 Microclimate
2.2.3 Measurement of C and N in Litter and Soil Samples
2.2.4 Estimation of Fine Root Biomass
2.2.5 Soil Fauna Sampling and Identification
2.2.6 Statistical Analysis
2.3 Results
2.3.1 Microclimate,Litter C and N,Soil Samples,and Fine Root Biomass
2.3.2 Soil Fauna Community as Affected by N Addition
2.3.3 Fine Root Biomass Regulation of Soil Fauna Density
2.4.Discussion
2.4.1 N-addition Impacts on Soil Fauna Density
2.4.2 N-addition Impacts on the Number of Groups and Diversity of Soil Fauna
2.4.3 Increasing N-Addition Thresholds along Soil Profile
2.4.4 Regulation of Fine Root Biomass on Soil Fauna
Chapter3 Effects of fertilization on soil fauna community:a meta-analysis
3.1 Introduction
3.2 Methods
3.2.1 Data collection
3.2.2 Data analysis
3.3 Results
3.3.1 The average effects of fertilization on soil and microbial attributes
3.3.2 The variation of fertilization effects on soil fauna abundance
3.3.3 Influence of fertilizer types on soil fauna abundance among ecosystem types
3.3.4 Influence of fertilizer types on soil fauna abundance among climate zones
3.3.5 Influence of fertilization on the group number and diversity of soil fauna community
3.3.6 Measuring correlations of soil fauna community with soil and microbial characteristics
3.4 Discussion
3.4.1 Overall effect of fertilization on soil fauna abundance
3.4.2 Overall effect of fertilization on group number and diversity of soil fauna
3.4.3 Influence of experimental and geographic factors on soil fauna abundance
3.4.4 Regulation of microbe on soil fauna
Chapter4 Conclusions and Future Perspectives
4.1 Conclusions
4.2 Future perspectives
Publications
References
本文编号：4030487
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