Re-use of sugarcane residue as a novel biochar fertiliser-Increased phosphorus use efficiency and plant yield

Autor(es)

Borges, Bernardo M. M. N. ^{[1, 2]} ; Strauss, Mathias ^{[3, 1]} ; Camelo, Priscila A. ^[2] ; Sohi, Saran P. ^[4] ; Franco, Henrique C. J. ^[2]

Afiliação do(s) autor(es)

^[1] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Nanotechnol Natl Lab LNNano, BR-13083100 Campinas, SP - Brazil

^[2] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Biorenewables Natl Lab LNBR, BR-13083100 Campinas, SP - Brazil

^[3] Fed Univ ABC, Ctr Nat & Human Sci, Santo Andre, SP - Brazil

^[4] Univ Edinburgh, Sch GeoSci, UK Biochar Res Ctr, Edinburgh EH9 3FF, Midlothian - Scotland

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CLEANER PRODUCTION; v. 262, JUL 20 2020.
• Citações Web of Science: 6

Resumo

With the advent of mechanized sugarcane harvesting in Brazil around 70 Mt of straw each year is left on the field, and similar to 70% of its carbon (C) is decomposed and returned to the atmosphere on the same timeframe. The adoption of a stabilised C product such as biochar as a vehicle for nutrient delivery might address two ends of a problem: to increase nutrient use efficiency by plants while creating a viable and efficient strategy to increase stable C in soil. This study proposed a production route for a biochar fertiliser (BF) from sugarcane straw biochar (SSB), by activation of SSB with KOH and subsequent neutralisation with H3PO4. The phosphorus (P) content of BF (8.6% P) was superior to SSB. It was also noticed that structure of SSB matrix was altered, creating increased sorption capacity, with the fertiliser bound to the biochar rather than physically mixed. The BF was tested in a controlled condition experiment with sugarcane for 120 days using three low P soils with different clay contents (147, 326 and 528 g kg(-1)). BF led to higher biomass yield (15%) and P use efficiency (PUE) (similar to 10%) compared to standard P source (triple superphosphate - TSP) in the most clayey soil. The adoption of a fertiliser based on a nutrient enriched biochar can increase the effectiveness of crop production. Enhanced delivery of crop nutrients increases the attractiveness of increased soil C. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 16/13813-8 - Caracterização, produção e avaliação de biofertilizante organomineral à base de palha de cana-de-açúcar pirolisada
• Beneficiário: Bernardo Melo Montes Nogueira Borges
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado