Transition from intensive tillage to no-till enhances carbon sequestration in microaggregates of surface soil in the North China Plain

文献类型： 外文期刊

第一作者： Du, Zhangliu

作者： Du, Zhangliu;Zhang, Qingzhong;Ren, Tusheng;Ren, Tusheng;Hu, Chunsheng

作者机构：

关键词： No-till;Microaggregate;Density fractionation;Occluded light fraction

期刊名称：SOIL & TILLAGE RESEARCH （ 影响因子：5.374； 五年影响因子：6.368 ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： Physical protection by soil aggregates is critical for building soil organic carbon (SOC) stock. The objective of this study was to identify SOC sequestrated in the microaggregate holding within macroaggregte (mM) fraction after shifting tillage systems in the North China Plain. Soil samples from 0-5 cm layer of a 6-yr field experiment (MP - R, moldboard plow without residue; MP + R, moldboard plow with residue; RT, rotary tillage with residue; NT, no-till with residue) were collected and separated into different water-stable aggregates. The macroaggregate (250-2000 mu m) was further isolated into intra-aggregate particulate organic matter (iPOM) fractions by density flotation, dispersion and sieving. The results showed that the SOC concentration of fine iPOM (250f, 53-250 mu m) was increased by 23% in RT and 39% in NT compared with MP + R, whereas the difference in the coarse iPOM (250c, >250 mu m) was not observed. The ratio of 250f-250c (i.e., 250f/250c) followed the order of NT (2.12) approximate to RT (1.94) > MP + R (1.50) approximate to MP - R (1.47), indicating the alternative tillage systems decreased the turnover rates of macroaggregates. Adoption of NT and RT improved the mM formation by 36% and 23% and mM associated C concentration by 38% and 31% as relative to MP + R system. Additionally, the soil C concentration and storage of the iPOM and silt plus clay fractions located within the microaggregate were higher under NT and RT than that of MP + Rand MP - R systems. Thus applying NT and RT improved mM formation and soil C sequestered inside this fraction. We concluded that adoption of NT and RT enhanced SOC sequestration in the microaggregates of surface soil of the intensive agroecosystem of North China. (C) 2014 Elsevier B.V. All rights reserved.

分类号： S1

  • 相关文献

[1]The effect of no-till on organic C storage in Chinese soils should not be overemphasized: A meta-analysis. Du, Zhangliu,Zhang, Qingzhong,Li, Guichun,Angers, Denis A.,Ren, Tusheng.

[2]Dynamics of physically-separated soil organic carbon pools assessed from delta C-13 changes under 25 years of cropping systems. Dou, Xiaolin,Dou, Xiaolin,He, Ping,Zhou, Wei,Wang, Ligang,Cheng, Xiaoli,Zhu, Ping. 2017

[3]Potential Effect of Conservation Tillage on Sustainable Land Use: A Review of Global Long-Term Studies. Wang Xiao-Bin,Cai Dian-Xiong,Hoogmoed, W. B.,Oenema, O.,Perdok, U. D..

[4]Long-term fertilization effects on soil organic carbon stocks in the irrigated desert soil of NW China. Chai, Yanjun,Ma, Shiming,Zeng, Xibai,Li, Lianfang,Duan, Ran,Su, Shiming,Chai, Yanjun,E, Shengzhe,Che, Zongxian.

[5]Dryland maize yields and water use efficiency in response to tillage/crop stubble and nutrient management practices in China. Wang, Xiaobin,Dai, Kuai,Zhang, Dingchen,Zhang, Xiaoming,Wang, Yan,Zhao, Quansheng,Cai, Dianxiong,Wang, Xiaobin,Dai, Kuai,Zhang, Dingchen,Zhang, Xiaoming,Wang, Yan,Zhao, Quansheng,Cai, Dianxiong,Cai, Dianxiong,Hoogmoed, W. B.,Oenema, O.. 2011

[6]Tillage and crop residue effects on rainfed wheat and maize production in northern China. Wang, Xiaobin,Wu, Huijun,Dai, Kuai,Zhang, Dingchen,Feng, Zonghui,Zhao, Quansheng,Wu, Xueping,Jin, Ke,Cai, Dianxiong,Wang, Xiaobin,Wu, Huijun,Dai, Kuai,Zhang, Dingchen,Feng, Zonghui,Zhao, Quansheng,Wu, Xueping,Jin, Ke,Cai, Dianxiong,Cai, Dianxiong,Oenema, O.,Hoogmoed, W. B.. 2012

[7]Shifts in soil organic carbon and nitrogen dynamics for afforestation in central China. Dou, Xiaolin,Shu, Xiao,Zhang, Quanfa,Cheng, Xiaoli,Dou, Xiaolin,Xu, Xia.

作者其他论文 更多>>

微信小程序