农业环境科学学报Issue(7)：1407-1413,7.DOI:10.11654/jaes.2015.07.025
紫色土夏玉米-冬小麦轮作农田的NO排放特征
Characteristics of NO Emissions from Purple Soil Under Summer Maize-Winter Wheat Rotation
摘要
Abstract
Static-gas collection technique combined with chem-luminescent analyzer was used to measure NO emitted from agro-ecosystem of purple soil under summer maize-winter wheat rotation during June 2013 to May 2014. Long term synthetic NPK fertilizer(NPK)and no fertilizer treatments(CK)were used to calculate NO emission factor(EF)induced by N fertilization. Fertilization was the cause of NO emis-sions in both maize and wheat seasons. The NO emissions reached peak 20 days after fertilization, and then decreased and maintained at low fluxes during the rest period of the season. The cumulative NO emissions during whole maize-wheat rotation was 0.450 kg N·hm-2, of which the maize season accounted for 0.200 kg N·hm-2 with EF of 0.13%while the wheat season was 0.250 kg N·hm-2 with EF of 0.20%. There was significant relationship between NO emission flux and soil temperature and soil moisture in the maize season, whereas no relationship was found in the wheat season. This may imply complicated influencing factors of soil NO emissions. Plant growth reduced NO emissions compared to bare soil due to the N absorption by plants.关键词
NO排放/玉米-小麦轮作/紫色土/施肥Key words
NO emission/maize-wheat rotation/purple soil/synthetic NPK fertilization分类
资源环境引用本文复制引用
胡廷旭,刘韵,柯韵,朱波..紫色土夏玉米-冬小麦轮作农田的NO排放特征[J].农业环境科学学报,2015,(7):1407-1413,7.基金项目
国家重点基础研究计划项目（2012CB417101）；国家自然科学基金项目 （）
