文献类型： 外文期刊

作者： Wang, J. ¹ ; Lu, C. ¹ ; Xu, M. ¹ ; Zhu, P. ² ; Huang, S. ³ ; Zhang, W. ¹ ; Peng, C. ² ; Chen, X. ⁴ ; Wu, L. ⁵ ;

作者机构： 1.Chinese Acad Agr Sci, Key Lab Crop Nutr & Fertilizat, Inst Agr Resources & Reg Planning, Minist Agr, Beijing 100081, Peoples R China

2.Jilin Acad Agr Sci, Ctr Agr Environm & Resources, Changchun 130033, Peoples R China

3.Henan Acad Agr Sci, Inst Plant Nutr Resources & Environm, Zhengzhou 450002, Peoples R China

4.Northwest A&F Univ, Coll Resources & Environm, Yangling 712100, Peoples R China

5.Rothamsted Res, Sustainable Soils & Grassland Syst Dept, Okehampton EX20 2SB, Devon, England

关键词： RothC simulation model;modelling;carbon sequestration;soil organic matter;long-term experiment

期刊名称：SOIL USE AND MANAGEMENT （ 影响因子：2.95； 五年影响因子：3.109 ）

ISSN： 0266-0032

年卷期： 2013 年 29 卷 2 期

页码：

收录情况： SCI

摘要： Soil organic carbon (SOC) modelling is a useful approach to assess the impact of nutrient management on carbon sequestration. RothC was parameterized and evaluated with two long-term experiments comparing different fertilizer treatments in north (Zhengzhou) and northeast (Gongzhuling) China. Four nutrient application treatments were used: no fertilizer (Control), mineral nitrogen-phosphorus-potassium fertilizers (NPK), NPK mineral fertilizer plus manure (NPKM), and NPK mineral fertilizer plus straw return (NPKS). The comparison between simulated and observed data showed that the model can adequately simulate SOC contents in the Control, NPK and NPKM treatments but overestimated in the NPKS treatment at both sites. By changing the value of decomposable plant material:resistant plant material (DPM:RPM) ratio from the default value to 3.35 for the NPKS treatment at the Zhengzhou site, dynamics of simulated SOC agreed with measured values. A pseudo-parameter, straw retention factor was introduced to adjust the amount of straw incorporated into soils. Using the inverse simulation method and the modified value of the ratio, the best-fitted value was 0.24 for the NPKS treatment at the Gongzhuling site. This result indicated that retaining straw on the soil surface makes less contribution to carbon sequestration than if it is incorporated. With this modification for straw, the model produced reasonable predictions for the two sites. The model was run for another 30years with the modified parameter values and current average climatic conditions for different fertilizer treatments at both sites. The results suggested that the NPK application plus the addition of manure or straw would be better management practices for carbon sequestration.