土壤2017，Vol.49Issue(6)：1166-1171,6.DOI:10.13758/j.cnki.tr.2017.06.015
长期施肥下红壤旱地的固碳效率
Carbon Sequestration Efficiency Under Long-term Fertilization in Dryland of Red Soil
摘要
Abstract
Soil organic carbon (SOC) content is low in red soil, so the application of organic fertilizers is a better fertilization pattern. A long-term experiment was conducted since 1986 in drylands of red soil with a double corn cropping system under different fertilization regimes in Jinxian county of Jiangxi Province, subtropical China. The contents and pools of SOC were analyzed and the relationship between SOC pools and carbon inputs were assessed. The results showed that organic fertilizers increased the contents and pools of SOC, among 27 years, for NPKM (chemical and organic fertilizers) and OM (organic fertilizer) treatments, the increasing rates of SOC contents and SOC pools were 0.08 g/(kg·a) and 0.06 g/(kg·a), 0.24 t/(hm2·a)and 0.16 t/(hm2·a), respectively. Compared with CK (control), SOC contents and SOC pools of NPKM and OM increased by 51.5％ and 42.0％, 57.1％ and 45.7％, respectively. The relationship between C input amount and SOC pool fitted well the linear equation (y = -0.158 + 0.086x,R2 = 0.9715,P < 0.001). Carbon sequestration efficiency was 8.6％ in double corn cropping system, and SOC pool reached balance when carbon input was 1.84 t/(hm2·a). Therefore, applying organic fertilizers can improve SOC content and pool, which can provide references for fertilization management in red soil through carbon sequestration efficiency and SOC balance.关键词
土壤有机碳/红壤旱地/长期施肥/有机碳投入量/拟合方程Key words
Soil organic carbon/Red soil/Long-term fertilization/Organic carbon input/Fitted equation分类
农业科技引用本文复制引用
柳开楼,王赛莲,叶会财,李大明,黄庆海,余喜初,胡志华,徐小林,胡惠文,周利军..长期施肥下红壤旱地的固碳效率[J].土壤,2017,49(6):1166-1171,6.基金项目
江西现代农业科研协同创新专项(JXXTCX2015003-005),江西省科技支撑计划项目(20141BBF60050),公益性行业(农业)科研专项经费(201203030)和国家重点基础研究发展计划(973计划)项目(2011CB100501)资助. （JXXTCX2015003-005）
