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Effects of long-term fertilisation on aggregates and dynamics of soil organic carbon in a semi-arid agro-ecosystem in China

文献类型：期刊论文

作者Zhang, Jiaoyang1,3; Sun, Caili2; Liu, Guobin1,2; Xue, Sha1,2
刊名PEERJ
出版日期2018-05-21
卷号6页码:20
ISSN号2167-8359
关键词Long-term fertilization Path analysis Aggregate Volume fractal dimension The loess Plateau
DOI10.7717/peerj.4758
通讯作者Liu, Guobin(gbliu@ms.iswc.ac.cn)
英文摘要Background. Long-term fertilisation has a large influence on soil physical and chemical properties in agro-ecosystems. The effects on the distribution of aggregates, however, are not fully understood. We determined the dynamic change of the distribution of aggregates and soil organic carbon (SOC) content over time in a long-term field experiment established in 1998 on the Loess Plateau of China and illustrated the relationship between them. Methods. We determined SOC content and the distribution of aggregates in nine fertiliser treatments: manure (M); nitrogen (N); phosphorus (P); M and N; M, N, and P; M and P; N and P; bare land; and an unfertilised control. These parameters were then used for a path analysis and to analyse the fractal dimension (D-v). Results. The organic fertiliser increased SOC content. The proportions of 0.1-0.25 mm microaggregates and 0.25-0.5 mm macroaggregates were higher and the proportion of the 0.01-0.05 mm size class of the silt + clay fraction was lower in the treatments receiving organic fertiliser (M, MN, MNP, and MP) than that in the control, indicating that the addition of organic fertiliser promoted aggregation. The distribution of aggregates characterised by their fractal dimension (D-v), however, did not differ among the treatments. Discussion. D-v was strongly correlated with the proportion of the <0.002 mm size class of the silt + clay fraction that did not differ significantly among the treatments. The change in the distribution of aggregates was strongly correlated with SOC content, which could produce organic polymer binding agents to increase the proportion of larger particles. Long-term application of organic fertiliser is thus necessary for the improvement and maintenance of soil quality in semi-arid agricultural land when residues are removed.
WOS关键词PATH-ANALYSIS ; CROPPING SYSTEM ; MINERAL FERTILIZERS ; SIZE DISTRIBUTIONS ; LASER DIFFRACTION ; LOESS PLATEAU ; MANURE ; SEQUESTRATION ; MATTER ; STABILITY
资助项目National Key Research and Development Program of China[2016YFC0501707] ; National Key Technology RD Program[2015BAC01B03] ; West Young Scholars Project of The Chinese Academy of Sciences[XAB2015A05]
WOS研究方向Science & Technology - Other Topics
语种英语
出版者PEERJ INC
WOS记录号WOS:000434229400002
资助机构National Key Research and Development Program of China ; National Key Technology RD Program ; West Young Scholars Project of The Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/54922]  
专题中国科学院地理科学与资源研究所
通讯作者Liu, Guobin
作者单位1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China
2.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Jiaoyang,Sun, Caili,Liu, Guobin,et al. Effects of long-term fertilisation on aggregates and dynamics of soil organic carbon in a semi-arid agro-ecosystem in China[J]. PEERJ,2018,6:20.
APA Zhang, Jiaoyang,Sun, Caili,Liu, Guobin,&Xue, Sha.(2018).Effects of long-term fertilisation on aggregates and dynamics of soil organic carbon in a semi-arid agro-ecosystem in China.PEERJ,6,20.
MLA Zhang, Jiaoyang,et al."Effects of long-term fertilisation on aggregates and dynamics of soil organic carbon in a semi-arid agro-ecosystem in China".PEERJ 6(2018):20.

入库方式： OAI收割

来源：地理科学与资源研究所

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