草地学报

草地学报 ›› 2023, Vol. 31 ›› Issue (3): 827-833.DOI: 10.11733/j.issn.1007-0435.2023.03.024

• 研究论文 • 上一篇    下一篇

不同施肥策略对阴山北麓旱作燕麦人工草地N2O排放的影响

邢佳庆1, 刘刚1, 孙宇1, 曾媛韬1, 郑佳华1, 李邵宇1, 乌云嘎1, 王赟博1, 张彬1, 史世斌2, 王占海3, 赵萌莉1   

  1. 1. 内蒙古农业大学草原与资源环境学院, 内蒙古 呼和浩特 010010;
    2. 内蒙古自治区水利科学研究院, 内蒙古 呼和浩特 010052;
    3. 呼伦贝尔市农牧技术推广中心, 内蒙古 呼伦贝尔 021008
  • 收稿日期:2022-06-17 修回日期:2022-11-17 出版日期:2023-03-15 发布日期:2023-04-01
  • 通讯作者: 赵萌莉,E-mail:nmgmlzh@126.com
  • 作者简介:邢佳庆(1998-),女,汉族,内蒙古丰镇人,硕士研究生,主要从事草地生态研究,E-mail:xjq@emails.imau.edu.cn
  • 基金资助:
    国家自然基金（31861143001）资助

Effects of Different Fertilization Types on N2O Emissions from Dry Avena sativa L. Artificial Farmland in the Northern Slope of Yinshan Mountain

XING Jia-qing1, LIU Gang1, SUN Yu1, ZENG Yuan-tao1, ZHENG Jia-hua1, LI Shao-yu1, WU Yun-ga1, WANG Yun-bo1, ZHANG Bin1, SHI Shi-bin2, WANG Zhan-hai3, ZHAO Meng-li1   

  1. 1. College of Grassland and Resources and Environment, Inner Mongolia Agricultural University, Hohhot, Inner Mongolia 010010, China;
    2. Institute of Water Resources Sciences, Inner Mongolia Autonomous Region, Hohhot, Inner Mongolia 010052, China;
    3. Hulunbuir City Agricultural Technology Extension Center, Hulunbuir, Inner Mongolia 021008, China
  • Received:2022-06-17 Revised:2022-11-17 Online:2023-03-15 Published:2023-04-01

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摘要： 本研究以内蒙古武川县燕麦（Avena sativa）人工草地为研究对象，采用静态箱法，通过无氮施肥为对照（CK），设置常规施氮（NN），控释施氮（CN）2个施肥处理，研究旱作燕麦人工草地N2O排放规律，探讨N2O排放对不同施肥种类的响应。结果表明：与无氮施肥相比，常规施氮的地上生物量显著提高37.8%，控释施氮的地上生物量显著提高64.5%（P<0.05）；与常规施肥相比控释肥氮素利用率显著提升了71.0%（P<0.05）；不同施肥处理下，燕麦人工草地生长季的N2O排放通量均表现为先增加后降低的趋势，并在苗期和拔节期出现峰值；与无氮施肥相比，常规施氮的N2O排放量（0.85 kg·hm-2）显著提高44.1%，控释施氮的单位产量N2O排放量（0.86×10-4 g·g-1）显著降低37.2%（P<0.05）。本研究发现相较于常规施肥，控释氮肥提高了燕麦产量且降低了N2O的排放。

关键词: 施肥种类, 燕麦, 地上生物量, N2O排放, 阴山北麓

Abstract: The present study was conducted in oat (Avena sativa) artificial grassland in Wuchuan County, Inner Mongolia by setting up two fertilization treatments of the conventional nitrogen application (NN) and controlled-release nitrogen application (CN), along with no nitrogen fertilizer application as the control-check (CK). The static box approach was used to study the N2O emission patterns of dry oat artificial farmland and explore the response of N2O emission to different fertilization strategies. The results showed that the aboveground biomass was significantly increased by 37.8% with the conventional N application and 64.5% with the controlled-release N application compared to no N application (P<0.05);the nitrogen utilization rate of the controlled-release fertilization was significantly increased by 71.0% compared to that of the conventional fertilization (P<0.05). The N2O emission fluxes of oat artificial farmland showed a first increasing and then decreasing trend during the growing season under both nitrogen fertilization treatments, with a peak at the seedling and nodulation stages. Compared to the no nitrogen application, N2O emission of the conventional nitrogen application (0.85 kg·hm-2) was significantly increased by 44.1%, and N2O emissions per unit yield in the controlled release fertilization (0.86×10-4 g·g-1) was significantly reduced by 37.2% (P<0.05). This study demonstrated that controlled-release N fertilization increased oat yield and reduced N2O emissions compared to conventional fertilizer application.

Key words: Fertilization strategies, Avena sativa L., Above-ground biomass, N2O emission, Northern slope of Yinshan mountain

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