RT info:eu-repo/semantics/article
T1 Improved Organic Fertilisers Made from Combinations of Compost, Biochar, and Anaerobic Digestate: Evaluation of Maize Growth and Soil Metrics
A1 Ortiz Liébana, Noemí
A1 Crespo Barreiro, Andrea
A1 Mazuecos Aguilera, Ismael
A1 González Andrés, Fernando
A2 Produccion Vegetal
K1 Ingeniería agrícola
K1 Compost
K1 Biochar
K1 Anaerobic digestate
K1 Organic fertiliser
K1 Greenhouse trial
K1 Maize
K1 Soil biological activity
K1 Bio-residues
AB [EN] Treated bio-residues can be used as biostimulants in crops within the circular economy approach to reduce the use of traditional fertilisers. In this work, we optimised the combination rates for three types of treated bio-residues (compost, biochar, and anaerobic digestate (AD)) in two microcosm trials, one with a combination of compost and biochar and other with biochar and AD. The crop used was maize, and the variables analysed were plant growth, and soil chemical and biological properties. The combination of bio-residues improved plant growth and soil biological activity to a greater extent than one product alone; that is, compost and biochar performed better than compost alone and biochar, and AD performed better than biochar alone. However, while the concentration in the plant biomass of several essential nutrients for crops increased in the treatments with compost and biochar, and with biochar and AD, compared to the untreated controls, the nitrogen concentration was reduced. This was due to the competition for nitrogen between the plant and the soil microbiome, whose activity was activated. Due to the importance of nitrogen in plant growth, the increase in biomass production could be explained not only by the higher availability of other nutrients but also by the plant-growth-promoting activity exerted by the more active soil microbiome. Further research should focus on validating this hypothesis and unravelling the mechanisms involved. From the environmental site, the presence of biochar in the mixtures of organic residues reduced the soil nitrogen at risk of lixiviation and sequestered carbon, which partially compensated for the increased CO2 emissions because labile forms of carbon were present in the remaining organic residues.
PB MDPI
LK https://hdl.handle.net/10612/18898
UL https://hdl.handle.net/10612/18898
NO Ortiz-Liébana, N., Crespo-Barreiro, A., Mazuecos-Aguilera, I., & González-Andrés, F. (2023). Improved Organic Fertilisers Made from Combinations of Compost, Biochar, and Anaerobic Digestate: Evaluation of Maize Growth and Soil Metrics. Agriculture (Switzerland), 13(8), 1557. https://doi.org/10.3390/AGRICULTURE13081557
DS BULERIA. Repositorio Institucional de la Universidad de León
RD 30-jun-2024