Infield greenhouse gas emissions from sugarcane soils in Brazil: effects from synthetic and organic fertilizer application and crop trash accumulation

Autor(es):Mostrar menos -

do Carmo, Janaina Braga ^[1] ; Filoso, Solange ^[2] ; Zotelli, Luciana C. ^{[3, 4]} ; de Sousa Neto, Eraclito R. ^[5] ; Pitombo, Leonardo M. ^[1] ; Duarte-Neto, Paulo J. ^[6] ; Vargas, Vitor P. ^[3] ; Andrade, Cristiano A. ^[7] ; Gava, Glauber J. C. ^[8] ; Rossetto, Raffaella ^[9] ; Cantarella, Heitor ^[3] ; Neto, Andre E. ^[4] ; Martinelli, Luiz A. ^[5]

Afiliação do(s) autor(es)

^[1] Univ Fed Sao Carlos, Dept Ciencias Ambientais, BR-18052780 Sorocaba - Brazil

^[2] Univ Maryland, Ctr Environm Sci, Chesapeake Biol Lab, Solomons, MD 20688 - USA

^[3] Inst Agron Campinas, Div Sustentabilidade, BR-13020902 Campinas, SP - Brazil

^[4] Ctr Tecnol Canavieira, BR-13400970 Piracicaba - Brazil

^[5] Univ Sao Paulo, Ctr Energia Nucl Agr, BR-13400970 Piracicaba - Brazil

^[6] Univ Fed Rural Pernambuco, Unidade Acad Garanhuns, BR-55292270 Garanhuns, PE - Brazil

^[7] EMPRAPA Meio Ambiente, Empresa Brasileira Pesquisa Agr, BR-13820000 Jaguariuna - Brazil

^[8] Agencia Paulista Tecnol, BR-17201970 Jau - Brazil

^[9] Agencia Paulista Tecnol, BR-13400970 Piracicaba - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Global Change Biology Bioenergy; v. 5, n. 3, p. 267-280, MAY 2013.
• Citações Web of Science: 33

Resumo

Bioethanol from sugarcane is becoming an increasingly important alternative energy source worldwide as it is considered to be both economically and environmentally sustainable. Besides being produced from a tropical perennial grass with high photosynthetic efficiency, sugarcane ethanol is commonly associated with low N fertilizer use because sugarcane from Brazil, the world's largest sugarcane producer, has a low N demand. In recent years, several models have predicted that the use of sugarcane ethanol in replacement to fossil fuel could lead to high greenhouse gas (GHG) emission savings. However, empirical data that can be used to validate model predictions and estimates from indirect methodologies are scarce, especially with regard to emissions associated with different fertilization methods and agricultural management practices commonly used in sugarcane agriculture in Brazil. In this study, we provide in situ data on emissions of three GHG (CO2, N2O, and CH4) from sugarcane soils in Brazil and assess how they vary with fertilization methods and management practices. We measured emissions during the two main phases of the sugarcane crop cycle (plant and ratoon cane), which include different fertilization methods and field conditions. Our results show that N2O and CO2 emissions in plant cane varied significantly depending on the fertilization method and that waste products from ethanol production used as organic fertilizers with mineral fertilizer, as it is the common practice in Brazil, increase emission rates significantly. Cumulatively, the highest emissions were observed for ratoon cane treated with vinasse (liquid waste from ethanol production) especially as the amount of crop trash on the soil surface increased. Emissions of CO2 and N2O were 6.9kgha1yr1 and 7.5kgha1yr1, respectively, totaling about 3000kg in CO2 equivalent ha1yr1. (AU)

• Processo FAPESP: 08/55989-9 - Emissões de óxido nitroso (N2O), dióxido de carbono (CO2) e metano (CH4) a partir de solos cultivados com cana-de-açúcar no estado de São Paulo, Brasil
• Beneficiário: Janaina Braga do Carmo
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Jovens Pesquisadores
• Processo FAPESP: 08/56147-1 - Nutrição nitrogenada de cana-de-açúcar com fertilizantes ou bactérias diazotróficas
• Beneficiário: Heitor Cantarella
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático