Impacts of 22-year organic and inorganic N managements on soil organic C fractions in a maize field, northeast China
文献类型: 外文期刊
第一作者: Lou, Yilai
作者: Lou, Yilai;Liang, Wenju;Wang, Jingkuan;Lou, Yilai
作者机构:
关键词: Carbon fraction;Chemical fertilizer;C management index;Long-term experiment;Organic manure;Soil organic carbon
期刊名称:CATENA ( 影响因子:5.198; 五年影响因子:5.594 )
ISSN: 0341-8162
年卷期: 2011 年 87 卷 3 期
页码:
收录情况: SCI
摘要: Impacts of 22-year organic and inorganic N managements on total organic carbon (TOC), water-soluble organic C (WSOC), microbial biomass C (MBC), particulate organic C (POC) and KMnO(4) oxidized organic C (KMnO(4)-C) concentrations, C management index (CMI), and C storage in surface soil (0-20 cm) were investigated in a maize (Zea may L.) field experiment, Northeast China. The treatments included, CK: unfertilized control, M: organic manure (135 kg N ha(-1) year(-1)), N: inorganic N fertilizer (135 kg N ha(-1) year(-1)) and MN: combination of organic manure (67.5 kg N ha(-1) year(-1)) and inorganic N fertilizer (67.5 kg N ha(-1) year(-1)), TOC concentration and C storage were significantly increased under the M and MN treatments, but not under the inorganic N treatment. The organic treatments of M and MN were more effective in increasing WSOC. MBC, POC and KMnO(4)-C concentrations and CMI than the N treatment. The M treatment was most effective for sequestrating SOC (10.6 Mg ha(-1)) and showed similar increase in degree of grain yield to the N and MN treatments, therefore it could be the best option for improving soil productivity and C storage in the maize cropping system. (C) 2011 Elsevier B.V. All rights reserved.
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