Chinese Journal of Eco-Agriculture (中国生态农业学报) 2014/22:3 PP.277-283
The objectives of this paper were to study long-term patterns of change in black soil organic carbon (SOC) and the suitability of the DNDC model to predict SOC. Based on available data from pre-set long-term experiment in Gongzhuling, Jilin Province, 4 fertilization modes were used to analyze changes in SOC. The 4 fertilization modes included no fertilization (CK), only chemical fertilizer application (NPK), combing chemical and organic fertilizers application (NPKM) and chemical fertilizer with increased organic fertilizer application (M2+NPK). The data were also used to validate the DNDC model. The DNDC verification results showed that root mean square error (RMSE) of each treatment was less than 10%. This suggested that the simulated values were consistent with the observed values, and that the DNDC model was suitable for simulating SOC in the study area. Five factors (chemical fertilizer, organic manure, straw, temperature and precipitation) were used to test the sensitivity of the model. Organic manure application had the most significant and continuous effect on SOC content. Future SOC variation in the next 100 years was also predicted. The results showed that SOC content declined slightly (by 12.5%), from initial value of 13.2 g·kg-1 to the predicted value of 11.55 g·kg-1 in 2100 for the CK. For the NPK treatment, SOC content was stable and without any declining tendency. SOC contents of NPKM and M2+NPK treatments increased significantly to 24.4 g·kg-1 and 27.6 g·kg-1 in 2100, representing increases over the initial SOC content of 84.8% and 109.1%, respectively.
 赵明东, 罗晓红, 刘淑霞. 土壤活性有机碳养分有效性与作物产量的关系[J]. 安徽农业科学, 2006(4): 732–733 Zhao M D, Luo X H, Liu S X. Relationship between active soil organic carbon, nutrient bioavailability and crop yield[J]. Journal of Anhui Agricultural Sciences, 2006(4): 732–733
 杨学明. 利用农业土壤固定有机碳——缓解全球变暖与提高土壤生产力[J]. 土壤与环境, 2000, 9(4): 311–315 Yang X M. Carbon sequestration in farming land soils: An approach to buffer the global warming and to improve soil productivity [J]. Soil and Environmental Sciences, 2000, 9(4): 311–315
 刘淑霞, 刘景双, 赵明东, 等. 土壤活性有机碳与养分有效性及作物产量的关系[J]. 吉林农业大学学报, 2003, 25(5): 539–543 Liu S X, Liu J S, Zhao M D, et al. Relationship between ac-tive soil organic carbon, nutrient bioavailability and crop yield[J]. Journal of Jilin Agricultural University, 2003, 25(5): 539–543
 金峰, 杨浩, 赵其国. 土壤有机碳储量及影响因素研究进展[J]. 土壤, 2000, 32(1): 12–18 Jin F, Yang H, Zhao Q G. Advances in researches on soil or-ganic carbon storages and affecting factors[J]. Soils, 2000, 32(1): 12–18
 李甜甜, 季宏兵, 孙媛媛, 等. 我国土壤有机碳储量及影响因素研究进展[J]. 首都师范大学学报: 自然科学版, 2007, 28(1): 93–97 Li T T, Ji H B, Sun Y Y, et al. Advances in researches on soil organic carbon storages and affecting factors in China[J]. Journal of Capital Normal University: Natural Science Edi-tion, 2007, 28(1): 93–97