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After the production of the first MULCHING+ films, we tested their biodegradability in soil according to ISO 17556.
Subsequently we assessed the films burial’s impact with different compositions (1:1 or 17:3 chitosan-cellulose ratio) and enriched or not with monoammonium phosphate (MAP), on the main chemical and biochemical soil properties. In particular, we analysed:
N and P pools dynamic in soil, evaluating the MAP release from film to soil and its effect;
The variations of the microbial biomass and of the microbial community structure;
The effects on the enzyme activity in soil.
The initial tests have shown that films with a cellulose/chitosan 1:1 mass ratio achieved the complete biodegradation in soil, according to ISO 17556, in 120 days. On the contrary, films with a greater chitosan content (17:3 ratio) achieved just 65% degradation within 120 days. These results were presented as poster at the Third Joint Conference SICA, SISS, SIPe, 2023 (https://www.spa2023.it/assets/img/programma/LIBRO_RIASSUNTI_SPA2023.pdf)
Research Team: Vito Armando Laudicina, Luigi Badalucco, Delia Francesca Chillura Martino, Pellegrino Conte, Gabriella Lo Verde, Sara Paliaga, Veronica Concetta Ciaramitaro (University of Palermo, Department of Agricultural, Food and Forestry Sciences)
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