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Soil organic carbon sequestration as influenced by long-term manuring and fertilization in the rice-wheat cropping system

文献类型： 外文期刊

作者： Hu, Cheng 1 ; Xia, Xiange 1 ; Han, Xuemei 2 ; Chen, Yunfeng 1 ; Qiao, Yan 1 ; Liu, Donghai 1 ; Li, Shanglai 1 ;

作者机构： 1.Hubei Acad Agr Sci, Inst Plant Protect & Soil Fertilizer, Key Lab Fertilizer Resource Utilizat Wastes, Minist Agr, Wuhan 430064, Hubei, Peoples R China

2.Nanyang Normal Univ, Sch Life Sci & Technol, Nanyang 473061, Peoples R China

3.Collaborat Innovat Certer Wa

关键词： Crop biomass carbon; soil organic carbon; carbon sequestration rate; rice-wheat cropping system

期刊名称：CARBON MANAGEMENT （ 影响因子：3.182； 五年影响因子：2.653 ）

ISSN： 1758-3004

年卷期： 2018 年 9 卷 6 期

页码：

收录情况： SCI

摘要： Fertilization is a feasible approach to increase the soil organic carbon. To investigate the effect of fertilization on crop biomass carbon, dynamics of soil organic carbon and soil carbon sequestration rate in the (Oryza sativa L.)-wheat (Triticum aestivum L.) cropping system under the middle reach of the Yangtze River, central China, a thirty-three years (1981 - 2013) long-term fertilizer experiment was conducted with nine treatments, including no amendment addition treatment (control), nitrogen (N), phosphorus (P), potassium (K) fertilizer treatments (N, NP, NPK), manure (M) and manure combined with chemical fertilizer treatments (MN, MNP, MNPK, hMNPK). The results indicated that average crop biomass carbon was increased by 39.9 - 77.2% compared to unfertilized control (4.43 t ha(-1) yr(-1)) due to fertilizer application, the highest crop biomass carbon was 7.85 t ha(-1) yr(-1) in the hMNPK treatment and the lowest crop biomass carbon was 5.21 t ha(-1) yr(-1) in the N alone treatment. The annual total organic carbon input were 4.14 t ha(-1) yr(-1) in the M treatment and 5.80 t ha(-1) yr(-1) in the hMNPK treatment, which was 1.95 - 2.74 times of those in the NPK treatments (2.12 t ha(-1) yr(-1)). Total organic carbon input of soil were increased by 10.2 - 23.3 kg C ha(-1) yr(-1), and increment rate in the appended manure treatments were much higher than those in the control and inorganic fertilizer treatments. Soil organic carbon retention in the topsoil (0 - 20 cm) decreased by 0.11 - 0.14 t ha(-1) yr(-1) in the control, N and NP treatments; nevertheless, soil organic carbon sequestration rates varied from 0.03 to 0.20 t ha(-1) yr(-1) in the NPK and appended organic manure treatments. These results demonstrate that organic manure use or integrated organic manure with chemical fertilizer application can be important strategies for increasing soil organic carbon sequestration and maintaining soil quality in the rice-wheat cropping system of China.

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