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Fertilization increases paddy soil organic carbon density

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文献类型：外文期刊

作者： Wang, Shao-xian ¹ ; Liang, Xin-qiang ¹ ; Luo, Qi-xiang ² ; Fan, Fang ² ; Chen, Ying-xu ¹ ; Li, Zu-zhang ² ; Sun, Huo-x ¹ ;

作者机构： 1.Zhejiang Univ, Coll Environm & Resource Sci, Inst Environm Sci & Technol, Hangzhou 310029, Zhejiang, Peoples R China

2.Jiangxi Acad Agr Sci, Natl Engn Res Ctr Improving Red Soil China, Nanchang 330200, Peoples R China

3.Jiangxi Sci & Technol Normal Univ, Nanchang 330045, Peoples R China

4.A

关键词： Soil organic carbon (SOC);SOC density;Long-term fertilization;Paddy soil

期刊名称：JOURNAL OF ZHEJIANG UNIVERSITY-SCIENCE B （影响因子：3.066；五年影响因子：3.057 ）

ISSN： 1673-1581

年卷期： 2012 年 13 卷 4 期

页码：

收录情况： SCI

摘要： Field experiments provide an opportunity to study the effects of fertilization on soil organic carbon (SOC) sequestration. We sampled soils from a long-term (25 years) paddy experiment in subtropical China. The experiment included eight treatments: (1) check, (2) PK, (3) NP, (4) NK, (5) NPK, (6) 7F:3M (N, P, K inorganic fertilizers+30% organic N), (7) 5F:5M (N, P, K inorganic fertilizers+50% organic N), (8) 3F:7M (N, P, K inorganic fertilizers+70% organic N). Fertilization increased SOC content in the plow layers compared to the non-fertilized check treatment. The SOC density in the top 100 cm of soil ranged from 73.12 to 91.36 Mg/ha. The SOC densities of all fertilizer treatments were greater than that of the check. Those treatments that combined inorganic fertilizers and organic amendments had greater SOC densities than those receiving only inorganic fertilizers. The SOC density was closely correlated to the sum of the soil carbon converted from organic amendments and rice residues. Carbon sequestration in paddy soils could be achieved by balanced and combined fertilization. Fertilization combining both inorganic fertilizers and organic amendments is an effective sustainable practice to sequestrate SOC.

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