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当前位置: 首页 > 文章 > 秸秆还田对灌溉玉米田土壤反硝化及N_2O排放的影响 植物营养与肥料学报 2006,12 (6) 840-844
Position: Home > Articles > Effect of stubble incorporation and nitrogen fertilization on denitrification and nitrous oxide emission in an irrigated maize soil Journal of Plant Nutrition and Fertilizers 2006,12 (6) 840-844

秸秆还田对灌溉玉米田土壤反硝化及N_2O排放的影响

作  者：
王改玲;郝明德;陈德立
单  位：
墨尔本大学粮食与土地资源学院;中国科学院水利部水土保持研究所
关键词：
秸秆还田;氮肥施用;反硝化;N_2O排放;玉米
摘  要：
运用乙炔抑制技术研究了不同施氮水平下秸秆还田对灌溉玉米田土壤反硝化反应和氧化亚氮(N2O)排放的影响。结果表明,土壤反硝化速率及N2O的排放受氮肥施用、秸秆处理方式及其交互作用的显著影响。与秸秆燃烧相比,不施氮或低施氮水平时,秸秆还田可刺激培养初期反硝化反应速率及N2O排放,增加培养期间N2O平均排放通量;高施氮水平时,秸秆还田可降低反硝化反应速率及反硝化过程中的N2O排放。秸秆还田可降低反硝化中N2O/N2的比例。
译  名：
Effect of stubble incorporation and nitrogen fertilization on denitrification and nitrous oxide emission in an irrigated maize soil
作  者：
WANG Gai-ling~(1,2,3),HAO Ming-de~1,CHEN De-li~3(1 Institute of Soil and Water Conservation,Chinese Academy of Science and Ministry of Water Resources.Yangling 712100,China;2 College of Resource and Environment,Shanxi Agricultural University,Taigu 030801,China; 3 Faculty of Land and Food Resources,the University of Melbourne,Victoria 3031,Australia.)
关键词：
stubble incorporation;N fertilization;denitrification;N_2O emission;maize
摘  要：
Acetylene inhibition method was used to study effects of stubble incorporation and nitrogen fertilization on denitrification and N_2O emission in an irrigated maize soil.Stubble management was designed as stubble incorporation and stubble burn.Nitrogen fertilizer was applied with 5 rates: 0,100,200,300,400 kg/ha.Samples were taken after experiment has been set 4 years.Fresh soils were incubated at 85% WFPS(water filled pore space) with 1 kPa or no C_2H_2 for 8 d,and N_2O emission was measured during incubation.Results from variance analysis indicated that N fertilization rate,stubble incorporation and their interaction had profound effect on denitrification rate and N_2O flux.Compared with stubble burn,stubble incorporation stimulated denitrification and N_2O emission at the beginning of incubation under no and low fertilization rate,which result mean N_2O flux of incubation period was increased.However,the denitrification rate and N_2O emission of stubble incorporation were higher than that of stubble burn under high fertilization rate.Ratio of N_2O/N_2 from denitrification was decreased by stubble incorporation.

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