N2O emissions as response of process-related soil microbial activity to different irrigation and nitrogen fertilization regimes in potato cropping

N2O 排放作为与过程相关的土壤微生物活动对马铃薯种植中不同灌溉和施氮方式的响应

• 批准号: 405305955
• 负责人: Professorin Dr. Liliane Rueß
• 金额: --
• 依托单位: Leibniz-Institut für Agrartechnik und Bioökonomie e.V. (ATB)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2018
• 资助国家: 德国
• 起止时间: 2017-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/405305955?language=en
• 关键词: N2O; emissions; response; process; related

Agricultural soils are one of the main sources of N2O emissions. The objective of the proposed project is to reveal the complex microbial-mediated processes behind N2O emissions – i.e. composition, distribution and especially activity of the soil-inhabiting microbial community - depending on different irrigation-fertilization regimes. Irrigation technologies and N fertilization regimes influence the spatial and temporal distribution of water and N in the soil and are hence expected to affect N2O producing microbial populations. The project combines agronomic and microbial investigations and N2O emissions measurements in a field experiment with a potato cropping system under sprinkling, drip irrigation, fertigation and non-irrigation. Cumulative area- and product-related N2O emissions and the major physical, chemical and biological factors are determined to derive appropriate management strategies.

农业土壤是N2O排放的主要来源之一。拟建项目的目的是揭示N2O排放背后复杂的微生物介导过程，即土壤微生物群落的组成、分布和活动，这取决于不同的灌溉施肥制度。灌溉技术和施氮制度影响土壤中水分和氮的时空分布，因此预计会影响产生N2O的微生物种群。该项目结合了农艺和微生物调查以及一氧化二氮排放测量，对马铃薯种植系统进行了田间试验，采用喷灌、滴灌、施肥和不灌溉。确定与面积和产品有关的累积一氧化二氮排放量以及主要的物理、化学和生物因素，以得出适当的管理战略。