春玉米田施用双氰胺和硫包衣尿素的节本减排效果分析

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	春玉米田施用双氰胺和硫包衣尿素的节本减排效果分析
	李超; 万运帆; 李玉娥; 秦晓波
刊名	中国农业气象
	2013
卷号	34 期号:5 页码:526-531
关键词	春玉米氧化亚氮排放系数双氰胺硫包衣
ISSN号	1000-6362
其他题名	Effect of Dicyandiamide and Sulfur Coated Urea on Saving Cost and N2O Emission Reduction in Spring Corn Field
英文摘要	氧化亚氮(N_2O)是一种重要的温室气体,农田土壤是其重要的排放源。本研究利用温室气体自动测定系统,对华北平原春玉米农田尿素(U)、尿素添加10%双氰胺(DCD1)、尿素添加5%双氰胺(DCD2)、硫包衣尿素(SCU)和不施肥(CK)5个不同施肥处理土壤进行N_2O测定,以分析双氰胺和硫包衣尿素对土壤N_2O排放的影响。结果表明,(1)各处理N_2O排放总量顺序为U>SCU>DCD2>DCD1>CK,各处理的排放系数在0.20%~0.71%,与单施尿素相比,DCD1、DCD2分别减少N_2O排放59.5%、47.1%,硫包衣处理的N_2O排放与尿素处理差异不显著,但两者的N_2O排放均极显著高于添加DCD的处理(P<0.01)。(2)排放高峰是伴随土壤孔隙含水量(WFPS)明显上升而发生的,各施肥处理N_2O的排放通量与土壤WFPS呈极显著相关关系(P<0.01)。(3)DCD2施肥方案每减排1tCO_2-eq的同时可减少支出约178元,表明此方案可作为减少春玉米农田N_2O排放的技术措施。; Nitrous oxide (N_2O) is an important greenhouse gas and agricultural soil is a major source of N_2O emission.Effect of different fertilization treatments on N_2O emissions of spring corn fields in North China plain was continuously monitored using an automatic sampling and analyzing system.Fertilizer treatments included urea (U),urea mixed with 10% and 5% by N-weight of dicyandiamide (DCD1, DCD2),sulfur coated urea (SCU),and non-fertilizer (CK).Experiment results showed that,(1) the total N_2O emissions of the five treatments were U>SCU>DCD2>DCD1>CK.The emission factors ranged from 0.20% to 0.71%.In DCD treated plots, soil N_2O fluxes were 59.5% (DCD1) and 47.1% (DCD2) lower than N_2O fluxes in urea plots.There was no significant difference between SCU plots and U plots on N_2O fluxes.The N_2O fluxes of SCU plots and U plots were significantly higher than DCD plots (P<0.01).(2)The peak of N_2O emissions occurred while WFPS(Water Filled Pore Space) increased significantly,N_2O fluxes of all treatments and soil WFPS correlated significantly (P<0.01).(3)The DCD2 treatment could save about 178 yuan while reducing 1t CO_2 equivalent.It can be used as a technical measure to reduce N_2O emissions from spring corn field.
学科主题	农业基础科学
语种	中文
内容类型	期刊论文
源URL	[http://111.203.20.206/handle/2HMLN22E/16982]
专题	农业环境与可持续发展研究所_气候变化研究室
作者单位	中国农业科学院农业环境与可持续发展研究所, 农业部农业环境重点实验室, 北京, 100081
推荐引用方式 GB/T 7714	李超,万运帆,李玉娥,等. 春玉米田施用双氰胺和硫包衣尿素的节本减排效果分析[J]. 中国农业气象,2013,34(5):526-531.
APA	李超,万运帆,李玉娥,&秦晓波.(2013).春玉米田施用双氰胺和硫包衣尿素的节本减排效果分析.中国农业气象,34(5),526-531.
MLA	李超,et al."春玉米田施用双氰胺和硫包衣尿素的节本减排效果分析".中国农业气象 34.5(2013):526-531.