红壤稻田生态系统有机物料循环对土壤有机碳转化的影响  

Effects of organic materials cycling on soil organic carbon turnover in a red soil paddy ecosystem.

作　　者：周卫军[1] 王凯荣[2] 郝金菊[1] 刘鑫[2] 

机构地区：[1]湖南农业大学资源环境学院,长沙410128 [2]中国科学院亚热带农业生态研究所,长沙410125

出　　处：《生态学杂志》2006年第2期140-144,共5页Chinese Journal of Ecology

基　　金：国家自然科学基金重点项目(40235057);中国科学院知识创新工程项目(KZCX2-407);湖南农业大学人才基金资助项目(04YJ10)

摘　　要：通过对12年田间定位试验数据的分析,研究了红壤稻田生态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,红壤稻田生态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.红壤稻田生态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^-1;12年间易氧化有机碳最大增量达到3.8 g·kg^-1,胡敏酸和富里酸最大增量分别达到3.06和1.63 g·kg^-1.预测结果显示,有机物料循环再利用红壤稻田生态系统土壤有机碳50年内可提高8.3～18.9 g·kg^-1,增长率达到62.0%～140.7%.Based on the data of 12 years experiment in the Taoyuan Experimental Station of Agroecosystem Research of Chinese Academy of Sciences, this paper studied the contribution of organic materials cycling to the soil organic carbon turnover in a red soil paddy ecosystem. The results showed under the cycling of organic materials, the accumulation of soil organic carbon was promoted, the fraction of soil humus was improved, and the quality of soil organic matter was reformed. The annual increasing rate of soil organic carbon during 12 years was up to 0.37 g· kg^-1. while the increment of soil easily oxidized organic carbon, humic acid and fulvie acid was 3.8, 3.06 and 1.63 g· kg^-1 respectively. The simulation results of SCNC model （Soil Carbon and Nitrogen Cycle） showed that after 50 years of organic materials cycling, soil organic carbon content could be increased by 8.3 18.9 g· kg^-1 and the increasing rate could be up to 62.0 % 140.7 % in the red soil paddy ecosystem.

关 键 词：红壤稻田生态系统 有机物料 循环 有机碳 转化 

分 类 号：S511[农业科学—作物学] S181