title: Organo-mineral fertilisers from glass-matrix and organic biomasses: a new way to release nutrients. A novel approach to fertilisation based on plant demand.
abstract: BACKGROUND
  A glass-matrix fertiliser (GMF), a by-product from ceramic industries, releases nutrients only in the presence of complexing solutions, similar to those exuded by plant roots. This ensures a slow release of nutrients over time, limiting the risk of their loss in the environment. With the aim to improve fertiliser performance, GMF was mixed with vine vinasse (DVV), pastazzo (a by-product of the citrus processing industry, PAS) or green compost (COMP) and nutrient release was evaluated by citric and chloridric acid extraction, at different concentrations.
  
  
  RESULTS
  Theoretical and actual nutrients release were compared to evaluate possible synergistic effects due to the organic component added to the mineral fertiliser: phosphorus (+7.1%), K (+4.8%), Fe (+8.5%) and Zn (+5.5%) were released more efficiently by 2% citric acid from GMF + DVV, while Ca availability was increased (+5.3%) by 2% citric acid from GMF + PAS mixture. Both DVV and COMP increased by 12-18% the Fe release from GFM matrix.
  
  
  CONCLUSIONS
  Organic biomasses added to GMF increased the release of some macro and micronutrients through an 'activation effect', which suggests the employment of these organo-mineral fertilisers also in short-cycle crops production. Moreover, the re-use of some agro-industrial organic residues gives another 'adding value' to this novel organo-mineral fertilfertilisers.
authors: Consiglio per la Ricerca e la sperimentazione in Agricoltura-Centro di ricerca per lo studio delle Relazioni tra Pianta e Suolo (CRA-RPS), Rome, Italy. alessandra.trinchera@entecra.it
authors: Alessandra
authors: A
authors: Trinchera
authors: Maria
authors: M
authors: Allegra
authors: Elvira
authors: E
authors: Rea
authors: Giancarlo
authors: G
authors: Roccuzzo
authors: Simona
authors: S
authors: Rinaldi
authors: Paolo
authors: P
authors: Sequi
authors: Francesco
authors: F
authors: Intrigliolo