Agronomic, economic, and environmental assessment of site-specific fertilizer management of Brazilian sugarcane fields

Autor(es)

Sanches, Guilherme M. ^[1] ; Magalhaes, Paulo S. G. ^[2] ; Kolln, Oriel T. ^[3] ; Otto, Rafael ^[1] ; Rodrigues, Francelino ^[4] ; Cardoso, Terezinha F. ^[5] ; Chagas, Mateus F. ^[5] ; Franco, Henrique C. J. ^[6]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Luiz de Queiroz Coll Agr, Padua Dias Ave 11, Piracicaba, SP - Brazil

^[2] Campinas Univ UNICAMP, Sch Agr Engn, Campinas - Brazil

^[3] State Univ Northern Parana, UENP Campus Luiz Meneghel, Bandeirantes, Parana - Brazil

^[4] CIMMYT, Int Maize & Wheat Improvement Ctr, Sustainable Intensificat Program, Texcoco - Mexico

^[5] Brazilian Ctr Res Energy & Mat CNPEM, Brazilian Biorenewables Natl Lab LNBR, Campinas - Brazil

^[6] CROPMAN Agr Innovat, Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: GEODERMA REGIONAL; v. 24, MAR 2021.
• Citações Web of Science: 0

Resumo

Precision agriculture (PA) is an essential tool for site-specific management of soil fertility in sugarcane fields. However, the complexity of the cropping system, limitations on data handling, availability of adequate equipment and the lack of appropriate decision support systems limit the adoption of PA by the sugarcane industry. The objective of this study was to verify the potential economic, environmental and yield gains provided by the site-specific management of soil fertility in the sugarcane industry. A field experiment was conducted over four years, using conventional soil analysis, yield monitor data and variable rate application of lime, nitrogen (N), potassium (K) and phosphorus (P). After two years of variable rate application of fertilizer, available phosphorus (P) content was better distributed, stable, and sufficient to meet crop needs. Maps of potassium (K) rates changed each year, and K content reduced over the years, demonstrating that plant uptake of K was higher than applied. Results showed that applying fertilizer according to the spatial variability of soil can produce better economic and environmental gains, despite the similar average yield (similar to 80 Mg ha(-1) year(-1)) when compared with a field managed according to mill procedures. Maps of yield and soil fertility are a powerful tool for sugarcane management, providing useful information about nutritional requirements based on spatial variation of soil fertility. The economic-environmental assessment performed in this study showed that the site-specific management provides improved soil fertility and sustainability indicators, contributing to higher profitability and low environmental impacts. (C) 2021 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 18/10225-3 - Modelo de aplicação de nitrogênio para manejo localizado e sustentável das lavouras de cana-de-açúcar
• Beneficiário: Guilherme Martineli Sanches
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 15/01587-0 - Armazenagem, modelagem e análise de sistemas dinâmicos para aplicações em e-Science
• Beneficiário: João Eduardo Ferreira
• Modalidade de apoio: Auxílio à Pesquisa - Programa eScience e Data Science - Temático
• Processo FAPESP: 11/02817-9 - Identificação de parâmetros de solo e planta determinantes no manejo sustentável da cana-de-açúcar para energia com recursos de agricultura de precisão
• Beneficiário: Paulo Sergio Graziano Magalhães
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular
• Processo FAPESP: 14/14965-0 - Contribuição da Tecnologia de Agricultura de Precisão com a sustentabilidade da produção da cana-de-açúcar para produção de energia
• Beneficiário: Paulo Sergio Graziano Magalhães
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 13/50942-2 - Reflectância multiespectral por espectroscopia aplicada na predição de propriedades químicas de solo para o uso em agricultura de precisão em cana de açúcar
• Beneficiário: Paulo Sergio Graziano Magalhães
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Regular