Agronomic performance of green cane fertilized with ammonium sulfate in a coastal tableland soil

ABSTRACT 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.

Bibliographic Details

Main Authors:	Oliveira,Ana Paula Pessim, Alves,Bruno José Rodrigues, Anjos,Lúcia Helena Cunha dos, Lima,Eduardo, Zonta,Everaldo, Pereira,Willian, Soares,Paula Fernanda Chaves
Format:	Digital revista
Language:	English
Published:	Instituto Agronômico de Campinas 2017
Online Access:	http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0006-87052017000200246
Tags:	Add Tag No Tags, Be the first to tag this record!