摘要
DNDC模型在 GIS区域数据库的支持下 ,应用于华北平原高产粮区 (以河北省邯郸市为例 )农业生态系统土壤碳循环规律的研究中 ,运行结果表明 :1998年邯郸地区 6 70 973hm2农业耕地土壤的总有机碳储量为 12 781.4 4× 10 6 kg,以武安县和永年县最为丰富 ,平均每公顷耕地土壤有机碳 (SOC)储量为 195 4 5 .88kg。 1990年邯郸地区农业土壤有机碳为负平衡 ,1998年为正平衡。根据模型模拟分析得出 ,免耕、提倡人畜粪便还田、增加秸秆还田比例和适量施用化肥都可以增加土壤有机碳的积累 ,并可以减少环境污染、降低成本。
DNDC model was employed with the support of GIS regional database simulating the soil carbon cycle regulation of agro-ecosystem in High-yield Huabei Plain , taking Handan district as study case. The results running shows that: The total organic carbon storage of farm land in Handan district area was 12 781.4 4×106 kg. Furthermore SOC of Wuan county and Yongnian county is the most ab undant in this district with average percent hectare soil 19 545.88 kgC. In 1990 the organic carbon in Handan district kept in negative balance and in 1998 it kept positive balance. According the model simulating, Some agricultural meth ods, i.e. no tillage, returning straw to soil, proper manure and proper fertiliz er, could increase soil organic carbon accumulation, reduce environment poll ution, decrease cost and improve profits.
出处
《中国农业科技导报》
CAS
CSCD
2004年第5期27-32,共6页
Journal of Agricultural Science and Technology
基金
黄淮海平原曲周试区"十五"攻关课题"黄淮海平原高产区优质
高效农业结构模式与技术研究"资助。
关键词
华北平原
土壤
碳储量
营养平衡
high yield region
agro-ecosystem
soil
organic car bon
