Alteration in enzymatic stoichiometry controls the response of soil organic carbon dynamic to nitrogen and water addition in temperate cultivated grassland
文献类型：期刊论文
| 作者 | Xu, Meng1,2; Xu, Lijun3; Fang, Huajun1,2,4,5 ; Cheng, Shulan4; Yu, Guangxia4; Yang, Yan1; Lu, Mingzhu1
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| 刊名 | EUROPEAN JOURNAL OF SOIL BIOLOGY
 |
| 出版日期 | 2020-11-01 |
| 卷号 | 101页码:11 |
| 关键词 | Global change factors Soil microbial communities Enzyme activity Soil organic carbon fraction Cultivated grassland |
| ISSN号 | 1164-5563 |
| DOI | 10.1016/j.ejsobi.2020.103248 |
| 通讯作者 | Fang, Huajun(fanghj@igsnrr.ac.cn) |
| 英文摘要 | Cultivated grassland can serve as one solution to the degradation of natural grassland. However, less is understood of the response of the microbial communities in cultivated grassland soils to global change factors such as nitrogen (N) deposition and precipitation change, and their linkages with the dynamics of soil organic carbon (SOC). In this study, field experimental plots that simulate different N deposition and precipitation levels were established to investigate the responses of soil microbial communities and their linkages with particulate-sized SOC fractions. Results showed that the activities of hydrolytic enzymes responded significantly to N addition, watering and their combinations, whereas the abundance and composition of microbial communities showed no significant difference among treatments. Addition of N and water generally promoted the activities of N degrading enzymes such as beta-N-acetylglucosaminidase (NAG) and leucine aminopeptidase (LAP), and thus decreased the Cto N-degrading activity (enzyme C/N ratio). This decrease in enzyme C/N ratio was significantly correlated with the accumulation of microbial-accessible particulate organic carbon (POC), indicating that three years of N application did not alleviate microbial N limitation so that microbial communities had invested more in acquisition of N instead of C. In contrast, the content of microbial-inaccessible mineral associated organic carbon (MAOC) was decreased probably as a result of N limitation on the suppressed microbial growth. Collectively, these results highlight that stoichiometric deviation between substrate and microbial demand can be one critical driver for SOC dynamics in cultivated grassland under global change scenarios. |
| WOS关键词 | LONG-TERM NITROGEN ; MICROBIAL COMMUNITY COMPOSITION ; INCREASED PRECIPITATION ; N FERTILIZATION ; CLIMATE-CHANGE ; ELEVATED CO2 ; DEPOSITION ; METAANALYSIS ; BACTERIAL ; FUNGAL |
| 资助项目 | National Key R&D Program of China[2017YFA0604802] ; National Key R&D Program of China[2017YFA0604804] ; National Key R&D Program of China[2016YFC0500603] ; National Key R&D Program of China[2016YFC0503603] ; National Natural Science Foundation of China[41907036] ; National Natural Science Foundation of China[41977041] ; National Natural Science Foundation of China[31770558] ; CAS Strategic Priority Program[XDA200204020] ; CAS Strategic Priority Program[XDA23060401] ; second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK1003] ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province |
| WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
| 语种 | 英语 |
| WOS记录号 | WOS:000600974600002 |
| 出版者 | ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER |
| 资助机构 | National Key R&D Program of China ; National Natural Science Foundation of China ; CAS Strategic Priority Program ; second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Thousand Talents Plan Project of High-End Innovative Talents of Qinghai Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/137332]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Fang, Huajun |
| 作者单位 | 1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 2.Zhongke Jian Inst Ecoenvironm Sci, Jian 343000, Jiangxi, Peoples R China 3.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Hulunber Grassland Ecosyst Observat & Res Stn, Beijing 100081, Peoples R China 4.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China 5.Chinese Acad Sci, Northwest Plateau Inst Biol, Xining 81001, Qinghai, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Meng,Xu, Lijun,Fang, Huajun,et al. Alteration in enzymatic stoichiometry controls the response of soil organic carbon dynamic to nitrogen and water addition in temperate cultivated grassland[J]. EUROPEAN JOURNAL OF SOIL BIOLOGY,2020,101:11. |
| APA | Xu, Meng.,Xu, Lijun.,Fang, Huajun.,Cheng, Shulan.,Yu, Guangxia.,...&Lu, Mingzhu.(2020).Alteration in enzymatic stoichiometry controls the response of soil organic carbon dynamic to nitrogen and water addition in temperate cultivated grassland.EUROPEAN JOURNAL OF SOIL BIOLOGY,101,11. |
| MLA | Xu, Meng,et al."Alteration in enzymatic stoichiometry controls the response of soil organic carbon dynamic to nitrogen and water addition in temperate cultivated grassland".EUROPEAN JOURNAL OF SOIL BIOLOGY 101(2020):11. |
入库方式： OAI收割
来源：地理科学与资源研究所
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