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Comparison of carbon sequestration efficiency in soil aggregates between upland and paddy soils in a red soil region of China

文献类型： 外文期刊

作者： Liu Kai-lou 1 ; Huang Jing 1 ; Li Da-ming 2 ; Yu Xi-chu 2 ; Ye Hui-cai 2 ; Hu Hui-wen 2 ; Hu Zhi-hua 2 ; Huang Qing-hai 2 ;

作者机构： 1.Chinese Acad Agr Sci, Natl Engn Lab Improving Qual Arable Land, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China

2.Jiangxi Inst Red Soil, Sci Observat & Expt Stn Arable Land Conservat Jia, Natl Engn & Technol Res Ctr Red Soil Improvement, Minist Agr, Nanchang 331717, Jiangxi, Peoples R China

关键词： CSE; SOC stock; soil aggregate; C input; long-term fertilization

期刊名称：JOURNAL OF INTEGRATIVE AGRICULTURE （ 影响因子：2.848； 五年影响因子：2.979 ）

ISSN： 2095-3119

年卷期： 2019 年 18 卷 6 期

页码：

收录情况： SCI

摘要： There is limited information on carbon sequestration efficiency (CSE) of soil aggregates in upland and paddy soils under long-term fertilization regimes. In a red soil region of southern China, an upland soil experiment started in 1986 and a paddy soil experiment commenced in 1981. These experiments were conducted using different fertilization treatments. After 30 years, soil organic carbon (SOC) content and stock of different aggregate components were analyzed. The results showed that the SOC contents and stocks in upland soil were lower than in paddy soil. In both upland and paddy soils, the SOC contents and stocks of all aggregate components in NPKM (combined treatment with chemical nitrogen (N), phosphorus (P), potassium (K) fertilizers and manure) were the highest among all treatments. Compared with CK (no fertilizer), SOC content of all aggregate components in NPKM was increased by 13.21-63.11% and 19.13-73.33% in upland and paddy soils, respectively. Meanwhile, the change rates in SOC stock of all aggregate components in upland soil were lower than in paddy soil, although the change rate of SOC stock of all aggregate components in NPKM was higher than in other treatments. Furthermore, a linear equation could fit the relationships between carbon (C) input and change rate of SOC stock (P<0.05). Results indicated that the sum of CSE from all aggregate components in upland soil (16.02%) was higher than that of paddy soil (15.12%) in the same climatic condition and from the same parent material. However, the CSEs from all aggregates were higher than that of bulk soil, although the result from bulk soil also showed that the CSE of upland soil was higher than that of paddy soil.

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