SciELO - Scientific Electronic Library Online

 
vol.76 número2Stem conduction systems effect on the production and quality of mini tomato under organic managementResistance to Dichelops melacanthus (Hemiptera: Pentatomidae) in soybean genotypes of different maturity groups índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Bragantia

versão impressa ISSN 0006-8705versão On-line ISSN 1678-4499

Resumo

OLIVEIRA, Ana Paula Pessim et al. Agronomic performance of green cane fertilized with ammonium sulfate in a coastal tableland soil. Bragantia [online]. 2017, vol.76, n.2, pp.246-256.  Epub 15-Maio-2017. ISSN 0006-8705.  http://dx.doi.org/10.1590/1678-4499.186.

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∙ha−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∙ha−1. The highest margin of agricultural contribution was obtained at the rate of 100 kg N∙ha−1. The N use efficiency decreased from almost 49 to 38%, when the N rate increased from 100 to 160 kg N∙ha−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 : Saccharum spp.; sugarcane harvesting systems; nitrogen requirements.

        · texto em Inglês     · Inglês ( pdf )