| 北方农牧交错带草地土壤微生物量碳空间格局及驱动因素 |
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| 引用本文： | 陈新月,姚晓东,曾文静,王娓. 北方农牧交错带草地土壤微生物量碳空间格局及驱动因素[J]. 北京大学学报(自然科学版), 2021, 57(2): 250-260. DOI: 10.13209/j.0479-8023.2021.003 |
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| 作者姓名： | 陈新月 姚晓东 曾文静 王娓 |
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| 作者单位： | 1. 北京大学城市与环境学院, 北京 1008712. 北京大学深圳研究生院城市规划与设计学院, 深圳 518055 |
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| 摘 要： | 为探究我国北方农牧交错带草地表层(0～10 cm)和次表层(10～20 cm)土壤微生物量碳的空间格局及其环境驱动力,选择蒙辽平原、京北坝上、阴山北麓和宁陕黄土高原4个区域总计456个土壤样品(两个土层,57个样点,每个样点4个样方)进行调查.结果表明,表层与次表层土壤微生物量碳的空间格局具有一致性,均随纬度增加而增加...
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| 关 键 词： | 微生物量碳(MBC) 土壤深度 农牧交错带 草地生态系统 土壤pH |
| 收稿时间： | 2020-02-26 |
Spatial Pattern and Driving Factors of Soil Microbial Biomass Carbon in Grassland in Northern Agro-Pastoral Transition Zone |
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| CHEN Xinyue,YAO Xiaodong,ZENG Wenjing,WANG Wei. Spatial Pattern and Driving Factors of Soil Microbial Biomass Carbon in Grassland in Northern Agro-Pastoral Transition Zone[J]. Acta Scientiarum Naturalium Universitatis Pekinensis, 2021, 57(2): 250-260. DOI: 10.13209/j.0479-8023.2021.003 |
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| Authors: | CHEN Xinyue YAO Xiaodong ZENG Wenjing WANG Wei |
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| Affiliation: | 1. College of Urban and Environment, Peking University, Beijing 1008712. School of Urban Planning and Design, Peking University Shenzhen Graduate School, Shenzhen 518055 |
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| Abstract: | In order to explore spatial pattern of soil microbial biomass carbon (MBC) and its environmentaldriving forces in grassland surface layer (0?10 cm) and subsurface layer (10?20 cm) in the agro-pastoral transitionzone in northern China, 456 soil samples (57 sample sites, two soil layers and four replicates) were selected forinvestigation from Inner Mongolia-Liaoning plain, Bashang on the north of Beijing, the northern foot of YinshanMountain and Ningxia-Shaanxi Loess Plateau. The results showed that the spatial pattern of MBC was consistentbetween the surface and subsurface layer, which increased with latitude and had no significant change withlongitude and elevation. With the increase of degradation degree, the reduction of soil microbial biomass in thesubsurface layer was smaller than that in the surface layer. The difference of soil pH between the two layersdecreased with the degree of degradation. The difference in soil MBC between surface and subsurface soils wasregulated by the change of soil pH. The smaller the difference in pH between the two soil layers, the smaller thedifference in MBC. Climate, vegetation and soil factors could affect the spatial variation of MBC, and soil factorswere the main driving forces for MBC at the regional scale. The main influencing factor of MBC was soil totalcarbon at surface layer, and soil total nitrogen at subsurface layer. In the context of climate change and theintensification of human activities, the results were useful for predicting the response of soil microorganisms at theregional scale and maintaining and restoring ecological functions of degraded grasslands. |
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| Keywords: | microbial biomass carbon (MBC) soil depth agro-pastoral transition zone grassland ecosystem soil pH |
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