@misc{10481/84710,
year = {2023},
month = {7},
url = {https://hdl.handle.net/10481/84710},
abstract = {Previous studies have attributed both phytotoxicity and the capacity to mobilize nutrient elements to the presence of polyphenols and melanoidins in spent coffee grounds (SCG) and SCG-hydrochars obtained through hydrothermal carbonization (HTC). This work aimed to evaluate SCG and two SCG-hydrochars obtained at 160 and 200 °C that were functionalized with Zn salts (bio-chelates), to achieve the in vitro biofortification of lettuce. Two application modes were established: (1) a fixed Zn concentration of 10 mg kg−1 of soil and (2) a fixed dose of 0.5% bio-product. Soil alone (control A) and commercial chelates (control B) were used as controls. Outcomes showed that SCG-hydrochars retain the capacity to mobilize Zn compared to SCG. However, the chelating capacity was reduced (Zn: 94%) and the toxicity was significantly increased (p < 0.05) with higher temperatures of HTC (200 °C). Both fresh and dry lettuce weights were less affected at doses of 0.5% of bio-product and registered a maximum increase of 136% of Zn in the plant content. The present study approaches the possibility of using these by-products as bioinorganic fertilizers at subtoxic doses, although more research is needed},
organization = {PY20_00585 from FEDER and RDPTC-2018
(AT17_6096_OTRI UGR) from the Andalusia n Ministry of Economic Transformation, Knowledge,
Industry and Universities.},
publisher = {MDPI},
keywords = {Hydrothermal carbonization},
keywords = {Micronutrients},
keywords = {Bio-chelates},
keywords = {Hidden hunger},
keywords = {Agricultural soil},
keywords = {Spent coffee grounds},
keywords = {Biofortification},
title = {Hydrochars Derived from Spent Coffee Grounds as Zn Bio-Chelates for Agronomic Biofortification},
doi = {10.3390/ su151310700},
author = {Lara-Ramos, Leslie and Cervera Mata, Ana Gloria and Fernández Bayo, Jesús Dionisio and Navarro Alarcón, Miguel and Delgado Calvo-Flores, Gabriel and Fernández Arteaga, Alejandro},
}