Nutrient effect of various composting methods with and without biochar on soil fertility and maize growth

Pandit Naba Raj, Schmidt Hans-Peter, Mulder Jan, Hale Sarah E., Husson Olivier, Cornelissen Gerard. 2020. Nutrient effect of various composting methods with and without biochar on soil fertility and maize growth. Archives of Agronomy and Soil Science, 66 (2) : 250-265.

Quartile : Q1, Sujet : AGRONOMY / Quartile : Q3, Sujet : SOIL SCIENCE

Résumé : This work showed for the first time that organic nutrient transformation techniques based on locally available materials (manure, green waste and advanced biochar) can increase fertilizing efficiency of the resulting substrate by a factor of three compared with other organic amendments without biochar. We used three different composting methods to investigate the techniques of organic nutrient transformations; i) conventional composting (composting process completed without turning the piles) ii) aerobic composting (composting process with manual turning of piles) and iii) bokashi composting (anaerobic lacto-fermentation). Composting was carried out in the absence (compost alone) and the presence of biochar (co-composted). Biochar was produced locally from an invasive forest shrub 'Eupatorium adenophorum'. A pot trial with maize grown in silty loam soil was carried out to investigate the agronomic effect produced using three above-mentioned composting methods that were compared with conventional mineral fertilizers (NPK). Significant effects of co-composted bokashi-biochar (60 t ha−1) were observed on maize growth, which increased biomass by 243% compared to mineral NPK, also showing better growth effects than conventional and aerobic composting amendments. Improved soil available nutrients (available P and other exchangeable base cations (K+, Ca2+ and Mg2+)) were probably the cause of the superior growth effect of co-composted bokashi-biochar.

Mots-clés Agrovoc : Zea mays, fertilisation, compost, Eupatorium, amendement du sol, charbon de bois, fertilité du sol

Mots-clés géographiques Agrovoc : Népal

Mots-clés complémentaires : Eupatorium adenophorum, biochar

Mots-clés libres : Biochar, Redox potential, Maize

Classification Agris : F04 - Fertilisation
F62 - Physiologie végétale - Croissance et développement
P35 - Fertilité du sol

Champ stratégique Cirad : CTS 2 (2019-) - Transitions agroécologiques

Auteurs et affiliations

• Pandit Naba Raj, NGI (NOR) - auteur correspondant
• Schmidt Hans-Peter, Ithaka Institute for Carbon Strategies (CHE)
• Mulder Jan, Norwegian University of Life Sciences (NOR)
• Hale Sarah E., NGI (NOR)
• Husson Olivier, CIRAD-PERSYST-UPR AIDA (FRA) ORCID: 0000-0001-9587-5819
• Cornelissen Gerard, NGI (NOR)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/592689/)

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