We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Biochar from grape pomace, a waste of vitivinicultural origin, is effective for root-knot nematode control.
- Authors
Martínez-Gómez, Ángela; Andrés, Maria Fe; Barón-Sola, Ángel; Díaz-Manzano, Fernando E.; Yousef, Ibraheem; Mena, Ismael F.; Díaz, Elena; Gómez-Torres, Óscar; González-Coloma, Azucena; Hernández, Luis E.; Escobar, Carolina
- Abstract
Root-knot nematodes (RKNs) are obligate endoparasites that feed on their host plants to complete its life cycle, representing a major threat to agriculture and economy worldwide. The development of new management strategies becomes essential as effective chemical nematicides are progressively being restricted. Hence, we analysed grape pomace-derived biochars, pyrolysed at 350 °C (BC350) and 700 °C (BC700), focusing on their potential for RKN control. The thermal treatment of grape pomace caused an increase in the concentration of carbon and plant macro- and micronutrients, which were largely present in a water-soluble form. Synchrotron radiation-based Fourier transform infrared microspectroscopy data showed a general loss of carboxylic functional groups during pyrolysis, partially contributing to the alkalinisation of both biochars, mostly in BC700. Scanning electron microscopy coupled with energy-dispersive X-ray spectroscopy analysis revealed a highly porous structure filled with different crystals composed of elements such as K, Ca, Mg, P, Si or Al, which could be a suitable environment for the growth of microorganisms. Biochar-derived aqueous extracts showed phytotoxicity to tomato seedlings at high concentrations, and disappeared upon dilution, but no toxic effect was observed on the nematode's infective stage. However, the infective and reproductive traits of a Meloidogyne javanica population in tomato were significantly reduced (i.e. egg masses and eggs per plant) in washed-biochar-treated soil in pots (0.75%; BC350W). Therefore, the large amount of grape waste generated after wine production can be transformed into a valuable product such as biochar, effective for RKNs control, thus reducing the waste management problem and contributing to a circular economy. Highlights: Grape pomace biochar had a porous structure and was enriched in C and other plant macro- and micronutrients. Biochar produced at high temperatures showed a certain degree of phytotoxicity. Biochar obtained at 350 °C at a 0.75% (w/w) application rate was effective for nematode control in pots.
- Subjects
BIOCHAR; ROOT-knot nematodes; ENDOPARASITES; MICRONUTRIENTS; SCANNING electron microscopy
- Publication
Biochar, 2023, p1
- ISSN
2524-7972
- Publication type
Article
- DOI
10.1007/s42773-023-00228-8