SAVE-Urin: Investigation of the use of pastorized urine fertilizer on climbing plants

Climbing plants are used in a variety of ways in façade greening. If they are not planted in the existing soil but in pots, a targeted, site-specific supply of water and nutrients tailored to the plant species is essential for sustainable growth on the façade. Nutrients can be supplied with organic or mineral fertilizers. In the SAVE-Urin research project, a pasteurized urine fertilizer is to be tested for the first time for use on climbing plants. The starting material is urine, which is collected using urine-diverting toilets in a multi-storey residential building. The following research questions will be answered: What effect does a pasteurized urine fertilizer have on plant development compared to the reference? How do relevant microclimatic parameters show on the test plants (climbing plants)? As part of a field trial, climbing plants planted in pots on a roof terrace are supplied with different fertilizer doses. By monitoring specific plant parameters (e.g. vitality, leaf color, growth behaviour, LAI), the aim is to find out whether the urine fertilizer can provide the climbing plants with a satisfactory supply of nutrients in a defined microclimatic environment. The findings from this research project will contribute to the sustainable circular economy of holistically operated, multi-storey residential buildings and represent new, forward-looking possibilities for the use of urine. Translated with DeepL.com (free version)