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Chinese Academy of Sciences Institutional Repositories Grid
Changes of labile organic carbon fractions in soils under different rotation systems

文献类型:期刊论文

作者Ni, JZ; Xu, JM; Xie, ZM; Wang, DJ
刊名PEDOSPHERE
出版日期2004-02-01
卷号14期号:1页码:103-109
关键词C-13-NMR rotation system soil microbial biomass carbon soil water-soluble organic carbon
ISSN号1002-0160
通讯作者Ni, JZ(nijz@ustc.edu.cn)
英文摘要Soil labile (biologically active) organic carbon fractions under different crop rotation systems in Jiangsu Province, China, were investigated after 10 years of rotation. The rotation systems, including green manure-rice-rice (GmRR), wheat-rice-rice (WRR), wheat-rice (WR) and wheat/corn intercrop-rice (WCR) rotations, were established on paddy soils using a randomized complete block design with three replicates. The total organic carbon (TOC), total nitrogen (TN) and water-soluble organic carbon (WSOC) in the soils under different systems were greater in the GmRR and WRR than in the WR and WCR rotation systems because the soils under triple cropping often received more crop residues than the soils under double cropping. Both the WSOC and the microbial biomass carbon (MBC) contents in the soils of the GmRR rotation system were significantly greater than those in the other crop rotation systems, which was due to the return of green manure to the fields of the GmRR rotation system. The results of a C-13 nuclear magnetic resonance (C-13-NMR) analysis indicated that the structural characteristics of soil WSOC were similar under the four crop rotation systems with carbohydrates and long-chain aliphatics being the major components. Correlation analysis showed that the content of the WSOC was positively correlated with that of the MBC (P < 0.01), and all had significantly positive correlations with TOC and TN. The coefficients of variation (CVs) for WSOC and WSOC/TOC were greater than the other indices (e.g, MBC, TOC and TN), suggesting that WSOC in the soils was more sensitive to these rotation systems. The results above indicated that the soil amended with green manure could not only increase the usable C source for soil microorganisms, but could also enhance soil organic matter content; hence, rotation with green manure would be a good strategy for sustainable agriculture.
收录类别SCI
WOS关键词TERM FIELD EXPERIMENT ; MICROBIAL BIOMASS ; MATTER QUALITY ; FOREST ; WATER ; DYNAMICS
WOS研究方向Agriculture
WOS类目Soil Science
语种英语
WOS记录号WOS:000189110400014
出版者SCIENCE CHINA PRESS
URI标识http://www.irgrid.ac.cn/handle/1471x/2558423
专题南京土壤研究所
通讯作者Ni, JZ
作者单位1.Univ Sci & Technol China, Sch Earth & Space Sci, Hefei 230026, Peoples R China
2.Zhejiang Univ, Coll Environm & Resource Sci, Dept Resource Sci, Hangzhou 310029, Peoples R China
3.Chinese Acad Sci, Inst Soil Sci, Nanjing 210008, Peoples R China
推荐引用方式
GB/T 7714
Ni, JZ,Xu, JM,Xie, ZM,et al. Changes of labile organic carbon fractions in soils under different rotation systems[J]. PEDOSPHERE,2004,14(1):103-109.
APA Ni, JZ,Xu, JM,Xie, ZM,&Wang, DJ.(2004).Changes of labile organic carbon fractions in soils under different rotation systems.PEDOSPHERE,14(1),103-109.
MLA Ni, JZ,et al."Changes of labile organic carbon fractions in soils under different rotation systems".PEDOSPHERE 14.1(2004):103-109.

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来源:南京土壤研究所

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