Collaborative project: Reduction of nitrous oxide emission in hydroponic greenhouse horticulture - subproject 1 (HydroN2O)
Project code: 281B204116
Contract period: 21.08.2018 - 20.10.2021
Budget: 218,584 Euro
Purpose of research: Applied research
Keywords: climate change adaptation, climate (climate relevance, climate protection, climate change), plant nutrition, vegetable production, reduction of greenhouse gas emissions
The reduction of the increasing nitrous oxide (N2O) concentration is tremendously important for the mitigation of the climate change. Approximately 60 % of the anthropogenic N2O-emissionen is caused by agriculture, i.e. preferentially by the input of large amounts of synthetic nitrogen (N)-fertilizer. In hydroponic plant production in greenhouses N-supply and N-concentration in the root environment are very high during the whole year what might increase N2O-emissionen. However, plant production in greenhouses offers several possibilities to control specifically greenhouse climate and conditions in the root environment. Thereby, it is possible to affect decisively amount of the N2O-emissionen. However, these actions should not reduce plant growth or quality. An important requirement to develop strategies for reduction of N2O-emissionen in intensive plant production is the understanding of the reasons for the N2O-emissionen. We have to determine and investigate the most important processes and influencing factors among the many, affecting the amount of emission with a great temporally and spatial variability. Particular importance has the interaction between plant, substrate and microorganisms, so far least understood. Based on the data collected, models will be developed and strategies derived to reduce N2O-emissionens. Those will be tested both, experimentally and under conditions of the practice. The goal is to reduce N2O-emissionen coming from plant production in greenhouses significantly without negatively affecting yield and produce quality. Research will be focused on hydroponic growing systems, because they are environmentally friendly and typical for the cultivation of many crops in greenhouses worldwide.