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| 氮肥水平对不同土壤N2O排放的影响 | |
| 引用本文： | 焦燕,黄耀,宗良纲,周权锁,Ronald L.Sass.氮肥水平对不同土壤N2O排放的影响[J].环境科学,2008,29(8):2094-2098. |
| 作者姓名： | 焦燕 黄耀 宗良纲 周权锁 Ronald L.Sass |
| 作者单位： | 1. 内蒙古师范大学化学与环境科学学院,呼和浩特,010022 2. 南京农业大学资源与环境学院,南京,210095;中国科学院大气物理研究所大气边界层物理和大气化学国家重点实验室,北京,100029 3. 南京农业大学资源与环境学院,南京,210095 4. Department of Ecology and Evolutionary Biology |
| 基金项目： | 中国科学院"百人计划"，国家莺点基础研究发展规划(973)项且，美国宇航局资助项目 |
| 摘 要： | 鉴于N2O排放量占施用氮肥量的比例即N2O排放系数还有很大不确定性,室外盆栽试验于2002-2003年选取3个供试土壤.各土壤没置对照和低、中、高氮肥水平,全年施尿素量(以N计)分别为334、670和1 004 kg/hm2.结果表明,水稻生长季,各个土壤的N2O累积排放量与其对照相比的增加量在低、中、高氮肥水平间无明显差异;而小麦生长季,随氮肥施用量增加,各个土壤的N2O累积排放量与其对照相比的增加量在3种氮肥水平之间的差异显著.整个稻麦轮作系统,随氮肥用量的增加明显促进麦田N2O的排放.无论水稻或小麦生长季,对照3个土壤的N2O累积排放量并无显著差异,F土壤(江苏溧水)、G土壤(江苏涟水)和H土壤(江苏农科院)的N2O累积排放量,在水稻生长季分别为168、127和146 ms/m2;小麦生长季,分别为134、124和168 mg/m2.在施氮肥后,3个土壤的N2O排放量出现差异,如在中氮水平下,小麦生长季.F土壤、G土壤和H土壤N2O累积排放量分别为976、744和626 mg/m2.稻麦轮作生长季内,在低氮与中氮2个水平下,不同土壤间N2O排放系数存在显著差异.以1个稻麦轮作周期为时间尺度,F土壤、G土壤和H土壤总的N2O排放系数分别为1.1%±0.23%、0.75%±0.17%和1.01%±0.11%,表明不同土壤对N2O排放系数的影响不同. |
| 关 键 词： | N2O排放 氮肥 稻麦轮作 盆栽试验 |
Impact of Different Levels of Nitrogen Fertilizer on N2O Emission from Different Soils |
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| JIAO Yan,HUANG Yao,ZONG Liang-gang,ZHOU Quan-suo,Ronald L.Sass.Impact of Different Levels of Nitrogen Fertilizer on N2O Emission from Different Soils[J].Chinese Journal of Environmental Science,2008,29(8):2094-2098. | |
| Authors: | JIAO Yan HUANG Yao ZONG Liang-gang ZHOU Quan-suo Ronald LSass |
| Affiliation: | College of Chemistry and Environmental Sciences, Inner Mongolia Normal University, Hohhot 010022, China. jiaoyan@imnu.edu.cn |
| Abstract: | To investigate the effect of different urea incorporation amount in different soils on N2O emission, a pot experiment was carried in 2002-2003. Four treatments were designed as the control (without urea incorporation); low N fertilizer level (334 kg/hm2); middle N fertilizer level (670 kg/hm); high N fertilizer level (1004 kg/hm2). In rice growing season, compared to control, the increment of N2O emission accumulation flux of each soil has no obviously differences among three N fertilizer levels. Contrarily, in wheat-planted soils, there are remarkably differences among three N fertilizer levels. Without urea incorporation, there are no differences among N2O accumulation emission flux of three soils. During the rice growing season, N2O accumulation emission flux of F soil (jiangsu province, lishui), G soil (jiangsu province, lianshui) and H soil (jiangsu province, agriculture academy) are 168, 127 and 146 mg/m2, respectively. N2O accumulation emission flux of F soil, G soil and H soil is 134, 124 and 168 mg/m2, respectively, during wheat growing season. Incorporation of urea into different soils yielded different influence on N2O emission. For example, at middle-N fertilizer, N2O accumulation emission flux from F soil, G soil and H soil is 976, 744 and 626 mg/m2, respectively. During rice-wheat rotation period, significance differences exists among N2O emission factors of three soils, with the value of (1.1 +/- 0.23)%, (0.75 +/- 0.17%) and (1.01 +/- 0.11)%. Furthermore, under the high N fertilizer level, N2O emission factors of three soils had no significantly difference (p = 0.3); while, the N2O emission factors existed difference among three soils under the low and middle N fertilizer level (F = 6.25, p = 0.01). |
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