Soil aggregates stability and storage of soil organic carbon respond to cropping systems on Black Soils of Northeast China
文献类型： 外文期刊
作者： Zhou, Meng 1 ; Liu, Chunzhu 1 ; Wang, Jie 3 ; Meng, Qingfeng 1 ; Yuan, Ye 4 ; Ma, Xianfa 1 ; Liu, Xiaobing 1 ; Zhu, Yingx 1 ;
作者机构： 1.Northeast Agr Univ, Sch Resources & Environm, Harbin 150030, Peoples R China
2.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Harbin 150081, Peoples R China
3.Harbin Acad Agr Sci, Dept Biol Ctr, Harbin 150028, Peoples R China
4.China Tobacco Corp, Mudanjiang Tobacco Sci Rsearch Inst, Heilongjiang Branch, Harbin 150076, Peoples R China
5.Northern State Univ, Dept Chem, Aberdeen, SD 57401 USA
6.Heilongjiang Acad Sci, Inst Nat Resources & Ecol, Harbin 150040, Peoples R China
7.Heilongjiang Acad Agr Sci, Inst Crop Cultivat & Tillage, Harbin 150086, Peoples R China
期刊名称：SCIENTIFIC REPORTS （ 影响因子：4.379； 五年影响因子：5.133 ）
ISSN： 2045-2322
年卷期： 2020 年 10 卷 1 期
页码：
收录情况： SCI
摘要： Monoculture and improper management may reduce soil fertility and deteriorate soil structure in Black soils (Mollisols) of Northeast China. The experiment was carried out from 2015 to 2016 in Black Soils comprising five cropping systems: continuous corn (CC), soybean-corn rotation (SC), corn-soybean rotation (CS), fallow-corn (FC), and fallow-soybean (FS). Our results showed that CS and FS treatments significantly increased mean weight diameter (MWD) and fractal dimension (D) in mechanical stability aggregates (MSAs), and increased MWD and geometric mean diameter (GMD) in water-stable aggregates (WSAs) compared with CC treatment. These two treatments were also significantly increased water-stable aggregates stability rate (WSAR), but decreased percentage of aggregates destruction (PAD) than CC treatment. Meanwhile, CS and FS treatments exhibited a higher carbon accumulation than CC treatment in bulk soils. Soil organic carbon (SOC) concentration in WSA(0.106-0.25),WSA(2-5 mm) and WSA(0.5-1) (mm) had a dominant effect on aggregate stability. Simutaneously, SOC in WSA(>5) (mm) affected SOC concentration in bulk soils. As a whole, the CS and FS treatments can increase the percentage of macro-aggregates, enhance aggregate stability, as well as increase SOC concentration in bulk soils and all soil aggregate sizes.
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