Fertilization efficiency, solubility and compliance testing of phosphorus recycling fertilizers
Abstract
Phosphorus (P) is an essential element for plants. The increasing mineral phosphate consumption in agriculture has raised concerns on its supply security and environmental impact. Bio-based fertilisers (BBFs) can transform the agricultural industry by minimising the environmental impact of existing fertilisers and improving sustainability recycling nutrient-rich side-streams. BBFs must comply with legal quality criteria to be marketed as fertilizers. Equilibrium-based batch extraction methods are conventionally used in compliance testing, but they fail to predict the P desorption taking place in soil. Sink based P extractions, which mimic continuous P uptake by plants, are a promising alternative. In this project, alternative compliance test methods will be evaluated, aiming at (1) characterizing diverse phosphorus BBFs with differential test methods, (2) comparing their extractability and fertilization efficiency in pot and field experiments and (3) determining which methods reflect the BBF fertilization efficiency best. The obtained data will indicate the characteristics needed in BBFs to become an effective alternative to conventional phosphate fertilizers, while preserving the environment and promoting the circular economy by recycling phosphorus waste.
Publikationen
Project staff
Hans-Peter Kaul
Univ.Prof. Dipl.-Ing. Dr.nat.techn. Hans-Peter Kaul
hans-peter.kaul@boku.ac.at
Tel: +43 1 47654-95111
Project Leader
18.08.2022 - 31.10.2024
Jakob Santner
Priv.-Doz. Dipl.-Ing. Dr.nat.techn. Jakob Santner
jakob.santner@boku.ac.at
Project Leader
01.11.2021 - 17.08.2022
Alicia Hernandez Mora
Dipl.-Ing. Alicia Hernandez Mora
alicia.hernandez-mora@boku.ac.at
Tel: +43 1 47654-95122
Project Staff
01.11.2021 - 31.10.2024