【作者】 周卫军； 王凯荣； 刘鑫；

【Author】 ZHOU Wei-jun,WANG Kai-rong, LIU Xin(College of Resources and Environment, Hunan Agricultural University, Changsha 410128.China; Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125,China)

【机构】 湖南农业大学资源环境学院； 中国科学院亚热带农业生态研究所；

【摘要】 通过对12年田间定位试验数据的分析,研究了红壤稻田系统有机物料循环再利用对土壤有机碳积累的贡献及其对转化的影响。结果表明,红壤稻田系统有机物料循环再利用可促进土壤有机碳的积累、改善腐殖质组分和改良有机质品质。红壤稻田系统内有机物料循环再利用,土壤有机碳的年增速率最大可达到0.37 g/kg;12年间易氧化有机碳最大增量达到3.8 g/kg,胡敏酸和富里酸最大增量分别达到3.06和1.63 g/kg。预测结果显示,有机物料循环再利用土壤有机碳50年内可提高8.3～18.9 g/kg,增长率达到62.0%～140.7%。更多还原

【Abstract】 Based on the data of long-term experiment during 12-year in Taoyuan Experimental Station of Agroecosystem Research of the Chinese Academy of Sciences, contribution of organic residue cycling to soil organic carbon and its effect on turnover of soil organic carbon was studied in red paddy system. The results showed the accumulation of soil organic carbon could be promoted, the fraction of soil humus could be improved and the quality of soil organic matter could be reformed under cycling of organic residue in red paddy system. The annual increase-rate of soil organic carbon could be up to 0.37g/ kg, while the increment of soil ready oxidation organic carbon, humic acid and fulvous acid were 3.8,3.06 and 1.63g/kg during 12-year, respectively, when organic residue was cycled in red paddy system.The simulation result of SCNC model (Soil Carbon and Nitrogen Cycle ) showed the content of soil organic carbon could increase by 8.3-18.9g/ kg and the increasing ratio was up to 62.0 %-140.7 % after 50 years with organic residue cycling in red paddy system.更多还原