RESIDUAL EFFECT OF THE APPLICATION OF SOURCES AND DOSES OF NITROGEN ON SUGARCANE CULTIVATED IN CERRADO RED LATOSOL
DOI:
https://doi.org/10.15809/irriga.2023v28n2p454-469Abstract
EFEITO RESIDUAL DA ADUBAÇÃO NITROGENADA NA SEGUNDA SOQUEIRA DE CANA-DE-AÇÚCAR IRRIGADA EM LATOSSOLO VERMELHO DE CERRADO
EDUARDO SOUSA CUNHA1; MARCONI BATISTA TEIXEIRA1; FERNANDO NOBRE CUNHA1; EDSON CABRAL DA SILVA1; WILKER ALVES MORAIS1; GABRIELA NOBRE CUNHA2
[1]Departamento de Hidráulica e Irrigação, Instituto Federal de Educação, Ciência e Tecnologia Goiano – Campus Rio Verde, Rodovia Sul Goiana, km 01, Zona Rural, CEP: 75.901-970, Rio Verde GO, Brasil, eduardo_sousa_rv@hotmail.com, marconibt@gmail.com, fernandonobrecunha@hotmail.com, edsoncabralsilva@gmail.com, wilker.alves.morais@gmail.com
2Departamento de Sociedade, Tecnologia e Meio Ambiente, UniEVANGÉLICA, Av. Universitária km 3,5 Cidade Universitária, CEP: 75083-515, Anápolis GO, Brasil, gabriela-nc@hotmail.com
1 RESUMO
O Brasil é o maior produtor mundial de cana-de-açúcar e seus derivados e a adubação nitrogenada destaca-se como uma das práticas culturais de maior demanda de pesquisas e para a cultura da cana-de-açúcar. Buscando atingir a máxima eficiência adubação e, consequentemente, produtividade, é necessário aprimoramento das técnicas de manejo. Objetivou-se determinar o efeito residual de diferentes fontes e doses de nitrogênio, aplicados no ciclo de cana-planta, sob o crescimento, acúmulo de biomassa seca, atributos tecnológicos e produtividade de colmos da cana-de-açúcar (IACSP95-5000) irrigada, no ciclo de segunda soca, cultivada em um Latossolo Vermelho de Cerrado. O experimento foi conduzido em condições de campo, em área da Fazenda Rio Paraiso II pertencente à Usina Raízen, no município de Jataí, GO. O delineamento experimental utilizado foi em blocos ao acaso, analisado em esquema de parcela fatorial 2 × 4, com três repetições. Os tratamentos foram duas fontes de nitrogênio (ureia e nitrato de amônio), quatro doses de nitrogênio (0, 60, 120 e 180 kg ha-1), aplicadas no ciclo de cana planta. Não foi verificado efeito residual das fontes e doses de N para as variáveis biométricas e massa seca. O efeito residual das doses de N promoveu um acréscimo na produtividade de colmos, rendimento bruto de álcool e rendimento bruto de açúcar.
Palavras-chave: Saccharum officinarum L, ureia, nitrato de amônio, rendimento bruto de açúcar.
CUNHA, E. S.; TEIXEIRA, M. B.; CUNHA, F. N.; SILVA, E. C.; MORAIS, W. A.; CUNHA, G. N.
Residual effect of the application of sources and doses of nitrogen on sugarcane cultivated in Cerrado Red Latosol
2 ABSTRACT
Brazil is the world's largest producer of sugarcane and its byproducts, sugar and alcohol. The production of sugarcane is an activity of great social, economic and environmental importance for Brazil. Nitrogen fertilization stands out as one of the cultural practices of greater demand for research and for the cultivation of sugarcane. To achieve maximum efficiency, fertilization and, consequently, productivity, it is necessary to improve management techniques. The objective of this study was to determine the residual effects of different sources and nitrogen rates applied in the cane plant cycle on growth, accumulation of dry matter, technological analysis and productivity of irrigated sugarcane (IACSP95-5000) in the second rat cycle, cultivated in the Cerrado Red Latosol. The experiment was carried out under field conditions in the area of the Rio Paraiso II farm belonging to the Raízen cane plant factory in the city of Jataí, GO, Brazil. The collected soil was classified as Dystrophic Red Latosol. For the chemical and physical characterization, samples of the soil were collected from 0.00--0.10, 0.10--0.20 and 0.20--0.40 m layers. The experimental design used was randomized blocks, analyzed in a 2 × 4 factorial scheme, with three replications. The factors analyzed were two sources of nitrogen (urea and ammonium nitrate) and four doses of nitrogen (0, 60, 120 and 180 kg ha -1). The parameters analyzed were the plant height, diameter of the stalks, length of the internodes, dry mass of the leaves, dry mass of the stalk, dry mass of the stem, total dry mass of the aerial part, juice brix, cane sucrose content, recoverable total sugar content, productivity of the stalks, yield of sugar and yield of alcohol. No residual effects of the sources or doses of N were observed for the biometric variables or dry mass. The residual N promoted an increase in the productivity of the stalks, yield of sugar and yield of alcohol.
Keywords: Saccharum officinarum L., urea, ammonium nitrate, yield of sugar.
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