Authors: Mortola, Natalia Andrea; Romaniuk, Romina Ingrid; Cosentino, Vanina Rosa Noemi; Carfagno, Patricia; Rizzo, Pedro Federico; Bres, Patricia Alina; Riera, Nicolas; Roba, Marcos Andrés; Butti, Mariano; Sainz, Daiana Soledad; Brutti, Lucrecia Noemi; Eiza, Maximiliano Joaquin
Publication Date: 2019.
Anaerobic digestion is a process that is widely used for the treatment of organic wastes. The digestate can be used as a soil amendment or crop fertiliser. The aims of our work were to evaluate 1) the physicochemical composition and pathogen content in a digestate from poultry manure, according to international regulations, and 2) the effect of its soil application on the major chemical and biological soil properties and on the growth of Lactuca sativa. The experiment consisted of two groups of pots (with and without crop). Treatments applied to each group were as follows: low and high doses of digestate and inorganic fertiliser, and no application (control) (low dose: 70 kg nitrogen (N) ha1 and 21 kg phosphorus (P) ha1; high dose: 210 kg N ha1 and 63 kg P ha1). Soil samples were taken 7 and 34 d (harvest) after treatment applications. Heavy metal and pathogen contents in the digestate were below the upper limit values. Despite the high pH and electrical conductivity values of the digestate, both soil parameters presented acceptable values for crop growth. Although there were no initial increases in total inorganic N and available P in soil with digestate application, an increase in the fresh weight of crop was observed with the high dose application. This is probably associated with the slow nutrient release from the digestate during the development of the crop. Changes in the microbial community were temporary and occurred at the initial sampling stage of the experiment.
Author affiliation: Romaniuk, Romina Ingrid. INTA. Instituto de Suelos; Argentina
Author affiliation: Cosentino, Vanina Rosa Noemi. INTA. Instituto de Suelos; Argentina.
Author affiliation: Eiza, Maximiliano Joaquin. INTA. Instituto de Suelos; Argentina
Author affiliation: Carfagno, Patricia. INTA. Instituto de Suelos; Argentina
Author affiliation: Rizzo, Pedro Federico. INTA. Instituto de Microbiología y Zoología Agrícola. Laboratorio de Transformación de Residuos; Argentina
Author affiliation: Bres, Patricia Alina. INTA. Instituto de Microbiología y Zoología Agrícola; Argentina
Author affiliation: Riera, Nicolas Iván. INTA. Instituto de Microbiología y Zoología Agrícola; Argentina
Author affiliation: Butti, Mariano. INTA. Instituto de Ingeniería Rural; Argentina.
Author affiliation: Sainz, Daiana Soledad. INTA. Instituto de Suelos; Argentina
Author affiliation: Brutti, Lucrecia Noemi. INTA. Instituto de Suelos; Argentina.
Author affiliation: Mortola, Natalia Andrea. INTA. Instituto de Suelos; Argentina
Author affiliation: Roba, Marcos Andrés. INTA. Instituto de Ingeniería Rural; Argentina
Keywords: Anaerobic Treatment; Crop Yield; Organic Wastes; Soil Amendments; Lettuces; Tratamiento Anaeróbico; Rendimiento de Cultivos; Desechos Orgánicos; Enmiendas del Suelo; Lechugas; Lactuca sativa; Organic Ferlitiser; Soil Chemical Properties; Soil Microbiological Properties; Fertilizante Orgánico; Propiedades Químicas del Suelo; Propiedades Microbiológicas del Suelo.
Repository: INTA Digital (INTA). Instituto Nacional de Tecnología Agropecuaria