| 施肥对河套灌区土壤CO_2和N_2O排放的影响 |
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| 引用本文： | 白雪原,红梅,杨彦明,郜翻身,霍利霞,张建强.施肥对河套灌区土壤CO_2和N_2O排放的影响[J].灌溉排水学报,2017,36(7). |
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| 作者姓名： | 白雪原 红梅 杨彦明 郜翻身 霍利霞 张建强 |
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| 作者单位： | 1. 内蒙古农业大学,呼和浩特,010019;2. 内蒙古土壤肥料工作站,呼和浩特,010011;3. 内蒙古巴彦淖尔杭锦后旗农业技术推广中心,内蒙古 巴彦淖尔,015400 |
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| 基金项目： | 内蒙古"青年科技英才支持计划"，内蒙古科技创新引导奖励资金项目 |
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| 摘 要： | 以河套灌区草甸碱化土为研究对象,设缓控肥(HK)、颗粒有机肥(F)、微生物菌肥(W)和农民习惯施肥(CK)4个处理,于2015年5—10月,利用静态箱-气相色谱法监测玉米整个生育期土壤CO_2和N_2O的排放量,并对玉米季农田温室气体排放量和产生的综合温室效应进行测算,研究了农田表层土壤温室气体的排放量和增温潜势。结果表明,(1)各处理N_2O的排放峰值均出现在施肥10 d后。玉米整个生育期HK处理的单位时间排放量最少(0.25 mg/(m2?h)),F处理的排放量最多(0.67 mg/(m2?h)),F处理N_2O累计排放量比CK高出62.40%;CK分别比W、HK处理N_2O排放量高出19.71%、54.26%。(2)各处理间CO_2排放差异显著(P0.05)。玉米整个生育期,W处理累积排放量最少(14 639.26 kg/hm2),F处理的排放量最多(18 603.4 kg/hm2),CK比W处理CO_2排放量高16.75%。(3)各施肥处理综合增温效应表现为HK处理W处理CKF处理。HK处理温室气体排放强度(GHGI)值最低,比CK低96%,同时保持了较高的产量水平;F处理氮肥量最大,且有较高的GHGI值,达到CK的1.70倍,同时产量较CK无显著变化;W处理氮肥量次之,且GHGI值较高,可产量较低。大量施用颗粒有机肥(F)会产生较多的温室气体,同时也会导致较强的温室效应。缓控肥(HK)处理氮肥量最小,作物产量增加,GHGI值最低,对农田温室气体减排具有较好的应用前景。
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| 关 键 词： | 施肥 CO2 N2O 排放强度 |
Fertilization Affects the Emission of CO2 and N2O in Hetao Irrigation Area |
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| BAI Xueyuan,HONG Mei,YANG Yanming,GAO Fanshen,HUO Lixia,ZHANG Jianqiang.Fertilization Affects the Emission of CO2 and N2O in Hetao Irrigation Area[J].Journal of Irrigation and Drainage,2017,36(7). |
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| Authors: | BAI Xueyuan HONG Mei YANG Yanming GAO Fanshen HUO Lixia ZHANG Jianqiang |
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| Abstract: | Impact of fertilization on greenhouse emission in Hetao Irrigation District was investigated in this pa-per. Four treatments were examined:slowly controlled releasing fertilizers (HK), organic fertilizer (F), microbial fertilizer (W) and business as usual (CK) from May to October in 2015. The emission of CO2 and N2O from a maize field was measured using static chamber gas chromatography to investigate the potential greenhouse gas emissions and temperature change at soil surface. The result revealed that ①N2O emission peaked in all treat-ments 10 days after applying N fertilizer. HK had the lowest while F had the highest emission rate during the whole growing season. N2O emission from F treatment was 62.40％higher than that from CK, whereas the N2O emission from CK was 19.71％ and 54.26％ higher than that from W and HK treatments respectively.②There were a significant difference in CO2 emission between the treatments, with W having the lowest emission and F the highest. CO2 emission from the CK was 16.75％higher than that from W.③The increase in soil-surface tem-perature under different treatments was in the order of HK
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| Keywords: | fertilization CO2 N2O emission intensity |
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