| 福建省农业生态系统氧化亚氮排放量估算及特征分析 |
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| 引用本文： | 李艳春,王义祥,王成己,郑百龙,黄毅斌.福建省农业生态系统氧化亚氮排放量估算及特征分析[J].中国生态农业学报,2014,22(2):225-233. |
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| 作者姓名： | 李艳春 王义祥 王成己 郑百龙 黄毅斌 |
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| 作者单位： | 福建省农业科学院农业生态研究所 福建省山地草业工程技术研究中心 福州 350013;福建省农业科学院农业生态研究所 福建省山地草业工程技术研究中心 福州 350013;福建省农业科学院农业生态研究所 福建省山地草业工程技术研究中心 福州 350013;福建省农业科学院农业经济与科技信息研究所 福州 350013;福建省农业科学院农业生态研究所 福建省山地草业工程技术研究中心 福州 350013 |
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| 基金项目： | "十二五"国家科技支撑计划项目(2012BAD14B03-5)、福建省科技计划项目(2011R1019-5, 2011R1018-2)和福建省发改委项目[闽发改区域(2012)341号]资助 |
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| 摘 要： | N2O是重要的温室气体,了解福建省农业生态系统N2O排放情况及其年代变化规律,对于寻找减排的技术路线与对策,进而实现全国的控制目标有重要意义。本研究基于福建省农业活动水平数据,采用区域氮素循环模型IAP-N方法,估算1991—2010年福建省农业生态系统氧化亚氮(N2O)的排放量(以纯氮量计)并分析其排放特征。结果表明:(1)1991—2010年福建省农业生态系统N2O排放总量(包括农田直接、间接排放,田间秸秆燃烧排放,粪便管理系统排放)呈先增加后降低趋势,从1991年的23 675.3 t·a–1增加到2006年的32 610.4t·a–1,之后降低至30 810.7 t·a–1(2010年)。1991—1995年、1996—2000年、2001—2005年、2006—2010年农业生态系统年平均N2O排放量分别为26 170.7 t·a–1、29 870.0 t·a–1、32 085.8 t·a–1、31 287.6 t·a–1。各类型排放量大小依次为:农田直接(66.2%)-粪便管理系统(20.7%)-农田间接(12.9%)-田间秸秆燃烧(0.2%)。(2)1991—2010年,农田N2O直接排放量呈先增加后降低趋势,从1991年的15 108 t·a–1增加到2006年的21 547 t·a–1,之后下降到2010年的20 594 t·a–1。4个时期年平均N2O直接排放量分别为17 073.0 t·a–1、19 976.8 t·a–1、21 183.4 t·a–1、20 778.6 t·a–1。农田旱作(包括蔬菜地、非蔬菜旱地、水旱轮作的旱季)N2O排放占农田N2O直接排放量的83.0%~90.7%,是农田直接排放的关键源。(3)1991—2010年间,福建省粪便管理系统N2O排放量保持在5 213.2~6 988.0 t·a–1,变化较稳定。粪便管理系统N2O排放的关键源为猪,占粪便管理系统N2O排放量的57.4%~67.9%。(4)2010年,农业生态系统N2O排放高值区主要分布在漳州市、南平市、泉州市和宁德市,其N2O排放量均在4 000 t·a–1以上,占全省总排放量的61.7%,应优先考虑削减这些地区的N2O排放。研究结果为决策者合理利用肥料,制定福建省农业生态系统温室气体减排措施提供科学依据。
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| 关 键 词： | NO排放 IAP-N模型 氮循环 农业生态系统 福建省 |
| 收稿时间： | 2013/4/22 0:00:00 |
| 修稿时间： | 2013/11/20 0:00:00 |
Analysis of N2O emissions from the agro-ecosystem in Fujian Province |
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| LI Yanchun,WANG Yixiang,WANG Chengji,ZHENG Bailong and HUANG Yibin.Analysis of N2O emissions from the agro-ecosystem in Fujian Province[J].Chinese Journal of Eco-Agriculture,2014,22(2):225-233. |
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| Authors: | LI Yanchun WANG Yixiang WANG Chengji ZHENG Bailong and HUANG Yibin |
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| Institution: | Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences; Fujian Engineering and Technology Research Center for Hilly Prataculture, Fuzhou 350013, China;;Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences; Fujian Engineering and Technology Research Center for Hilly Prataculture, Fuzhou 350013, China;;Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences; Fujian Engineering and Technology Research Center for Hilly Prataculture, Fuzhou 350013, China;;Fujian Engineering and Technology Research Center for Hilly Prataculture, Fuzhou 350013, China;Agricultural Ecology Institute, Fujian Academy of Agricultural Sciences; Fujian Engineering and Technology Research Center for Hilly Prataculture, Fuzhou 350013, China; |
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| Abstract: | Nitrogen dioxide (N2O) is a major greenhouse gas. Investigating N2O emissions from agro-ecosystems of Fujian Province is critical for developing efficient mitigation strategies. Based on agricultural data in Fujian Province, a regional nitrogen cycle model, IAP-N, was adopted to estimate N2O emissions (in nitrogen gauge) from agro-ecosystems in Fujian Province for the period 1991 2010. The results showed that N2O emissions from agro-ecosystems (including direct and indirect farmland emissions, emissions from field-straw burning and animal manure) initially increased from 23 675.3 t·a-1 in 1991 to 32 610.4 t·a-1 in 2006 and then decreased to 30 810.7 t·a-1 in 2010. Average annual N2O emissions were 26 170.7 t·a-1, 29 870.0 t·a-1, 32 085.8 t·a-1 and 31 287.6 t·a-1 during 1991-1995, 1996-2000, 2001-2005, 2006-2010, respectively. The order of N2O emissions from different sources was direct farmland (66.2%) > animal manure (20.7%) > indirect farmland (12.9%) > filed-straw burning (0.2%). Direct N2O emissions from farmland increased from 15 108 t·a-1 in 1991 to 21 547 t·a-1 in 2006 and then decreased to 20 594 t·a-1 in 2010. Average annual direct N2O emissions from farmland were 17 073.0 t·a-1, 19 976.8 t·a-1, 21 183.4 t·a-1 and 20 778.6 t·a-1, respectively. Upland crops such as vegetables, non-vegetables upland and paddy-upland rotation systems were the primary sources, accounting for 83.0% 90.7% of direct N2O emissions from farmlands. N2O emission from animal manure was 5 213.2 6 988.0 t·a-1 in 1991 2010, with no obvious changes. Pigs were the primary source of animal manure, accounting for 57.4% 67.9% of N2O emissions from animal manure. In 2010, N2O emissions from the agro-ecosystems mainly concentrated in Zhangzhou, Nanping, Quanzhou and Ningde Districts, with over 4 000 t·a-1 N2O emissions. These districts led N2O emission rates in the study area, accounting for 61.7% of provincial emission. The results laid the scientific basis for policy decisions on fertilizer efficiency and N2O emission mitigation in the agro-ecosystems in Fujian Province. |
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| Keywords: | N2O emission IAP-N model Nitrogen cycle Agro-ecosystem Fujian Province |
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