Data/hora: 13/06/2024 06:30:40

Biblioteca(s): | Embrapa Agrobiologia.
Data corrente: | 02/06/2017
Data da última atualização: | 02/06/2017
Autoria: | OLIVEIRA, A. P. P.; ALVES, B. J. R.; ANJO, L. H. C. dos; LIMA, E.; ZONTA, E.; PEREIRA, W.; SOARES, P. F. C.
Afiliação: | ANA PAULA PESSIM OLIVEIRA, UFRRJ; BRUNO JOSE RODRIGUES ALVES, CNPAB; LÚCIA HELENA CUNHA DOS ANJOS, UFRRJ; EDUARDO LIMA, UFRRJ; EVERALDO ZONTA, UFRRJ; WILLIAN PEREIRA, UFRRJ; PAULA FERNANDA CHAVES SOARES, UFRRJ.
Título: | Agronomic performance of green cane fertilized with ammonium sulfate in a coastal tableland soil
Ano de publicação: | 2017
Fonte/Imprenta: | Bragantia, v. 76, n. 2, Apr./Jun. 2017 Epub May 15, 2017.
ISSN: | 1678-4499
DOI: | http://dx.doi.org/10.1590/1678-4499.186
Idioma: | Inglês
Conteúdo: | The recent approach of eliminating the usage of fire for sugarcane harvesting resulted in managing the crop on a trashblanketed soil, to which a proper recommendation of N fertilization is lacking, a problem that remains in the coastal tablelands of the Espírito Santo State, Brazil. This study aimed at evaluating the effect of increasing N rates on stalk and sugar yields and the N use efficiency by the crop. The experimental area planted with sugarcane, at the first ratoon, is located in Linhares, Espírito Santo State. The treatments consisted of N rates varying from 80 to 160 kg N&#8729;ha&#8722;1 as ammonium sulphate, and a control without N, in a completely randomized blocks experimental design. Stalk yield increased with the N rate, and fitting the results to a quadratic function suggests no response to fertilizer rates above 130 kg N&#8729;ha&#8722;1. The highest margin of agricultural contribution was obtained at the rate of 100 kg N&#8729;ha&#8722;1. The N use efficiency decreased from almost 49 to 38%, when the N rate increased from 100 to 160 kg N&#8729;ha&#8722;1. There was no effect of increasing N rates on the sugar concentration, although the sugar yield response was positive and strongly influenced by the stalk production. Results showed the importance of reassessing the adequate N rate for maximizing yield in green cane production systems.
Palavras-Chave: | Nitrogen requirements; Saccharum spp; Sugarcane harvesting systems.
Categoria do assunto: | F Plantas e Produtos de Origem Vegetal
Registro original: | Embrapa Agrobiologia (CNPAB)
Exemplares: | CNPAB - (40491-1) - UPC - AP - PP - 2017.00042 -  - 2017.00042 - DIS