Integral approach for the evaluation of poultry manure, compost, and digestate: amendment characterization, mineralization, and effects on soil and intensive crops Waste Management

PEDRO RIZZO; BRIAN JONATHAN YOUNG; NATALIA PIN VISO; JAZMÍN CARBAJAL; LAURA ELIZABETH MARTÍNEZ; NICOLÁS IVÁN RIERA; PATRICIA ALINA BRES; MARÍA EUGENIA BEILY; LORENA BARBARO; MARISA FARBER; MARTA SUSANA ZUBILLAGA; DIANA CRESPO

Waste Management

Elsevier

Año: 2021

The egg industry has increased its production worldwide during the last decades. Several50 waste management strategies have been proposed to treat large volumes of poultry51 manure. Composting and anaerobic digestion are the main stabilization processes used.52 However, there are disagreements on the criteria for applying raw and treated poultry53 manure to the soil. We studied the relationship between physicochemical, toxicological,54 microbiological, parasitological, and metabarcoding parameters of raw and treated55 poultry manure (compost and digestate). Subsequently, we evaluated the mineralization56 of C, N and P, and the effects of amended soil on horticultural and ornamental crops.57 Compost and digestate presented better general conditions than poultry manure for use as58 organic soil amendments. The highest pathogenic microorganism content (total and fecal59 coliforms, Escherichia coli, and Salmonella spp.) was recorded for poultry manure.60 Multivariate analyses allowed associating a lower phytotoxicity with compost and a61 higher microbial diversity with digestate. Therefore, only compost presented stability and62 maturity conditions. We found high released CO2-C, N loss, and P accumulation in soil63 amended with a high dose of poultry manure during mineralization. However, high doses64 of poultry manure and digestate increased the biomass production in the valorization65 assay. We recommend the soil application of stabilized and mature poultry manure-66 derived amendments, which reduce the negative impacts on the environment and promote67 more sustainable practices in agricultural systems.