| 胡廷旭,刘韵,柯韵,朱波.紫色土夏玉米-冬小麦轮作农田的NO排放特征[J].农业环境科学学报,2015,34(7):1407-1413. |
| 紫色土夏玉米-冬小麦轮作农田的NO排放特征 |
| Characteristics of NO Emissions from Purple Soil Under Summer Maize-Winter Wheat Rotation |
| 投稿时间：2015-02-02 |
| DOI：10.11654/jaes.2015.07.025 |
| 中文关键词: NO排放 玉米-小麦轮作 紫色土 施肥 |
| 英文关键词: NO emission maize-wheat rotation purple soil synthetic NPK fertilization |
| 基金项目:国家重点基础研究计划项目(2012CB417101);国家自然科学基金项目(41271321) |
| 作者 | 单位 | E-mail | | 胡廷旭 | 中国科学院山地表生过程与生态调控重点实验室, 成都 610041
中国科学院成都山地灾害与环境研究所, 成都 610041
中国科学院大学, 北京 100049 | | | 刘韵 | 中国科学院山地表生过程与生态调控重点实验室, 成都 610041
中国科学院成都山地灾害与环境研究所, 成都 610041
中国科学院大学, 北京 100049 | | | 柯韵 | 中国科学院山地表生过程与生态调控重点实验室, 成都 610041
西南交通大学, 成都 610031 | | | 朱波 | 中国科学院山地表生过程与生态调控重点实验室, 成都 610041
中国科学院成都山地灾害与环境研究所, 成都 610041 | bzhu@imde.ac.cn |
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| 中文摘要: |
| 利用紫色土养分循环长期定位研究平台,通过静态箱-气袋采气-化学发光氮氧化物分析仪观测了紫色土夏玉米-冬小麦轮作周期的NO周年排放特征。结果表明,施肥促发紫色土NO的峰值排放,玉米与小麦季的土壤NO排放峰值均出现在施肥后20 d内。常规夏玉米-冬小麦轮作条件下NO年累积排放通量为0.450 kg N·hm-2,其中玉米季的NO累积排放通量为0.200 kg N·hm-2,排放系数为0.13%,小麦季的NO累积排放通量为0.250 kg N·hm-2,排放系数为0.20%。玉米季的NO排放速率与土壤表层温度呈指数响应关系,小麦季与温度关系不明显。土壤湿度对于玉米季常规施肥条件下NO的排放有显著的响应关系。种植作物的土壤较裸地的NO排放通量都有不同程度的降低。 |
| 英文摘要: |
| Static-gas collection technique combined with chem-luminescent analyzer was used to measure NO emitted from agro-ecosystem of purple soil under summer maize-winter wheat rotation during June 2013 to May 2014. Long term synthetic NPK fertilizer(NPK) and no fertilizer treatments(CK) were used to calculate NO emission factor(EF) induced by N fertilization. Fertilization was the cause of NO emissions in both maize and wheat seasons. The NO emissions reached peak 20 days after fertilization, and then decreased and maintained at low fluxes during the rest period of the season. The cumulative NO emissions during whole maize-wheat rotation was 0.450 kg N·hm-2, of which the maize season accounted for 0.200 kg N·hm-2 with EF of 0.13% while the wheat season was 0.250 kg N·hm-2 with EF of 0.20%. There was significant relationship between NO emission flux and soil temperature and soil moisture in the maize season, whereas no relationship was found in the wheat season. This may imply complicated influencing factors of soil NO emissions. Plant growth reduced NO emissions compared to bare soil due to the N absorption by plants. |
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