Stalk yield and technological attributes of planted cane as related to nitrogen fertilization

Authors

  • Henrique Coutinho Junqueira Franco USP; CENA; Lab. de Isótopos Estáveis
  • Paulo Cesar Ocheuze Trivelin USP; CENA; Lab. de Isótopos Estáveis
  • Faroni Carlos Eduardo Centro de Tecnologia Canavieira
  • André Cesar Vitti APTA; Pólo Regional Centro Sul
  • Rafael Otto USP; ESALQ; Programa de Pós-Graduação em Solos e Nutrição de Plantas

DOI:

https://doi.org/10.1590/S0103-90162010000500012

Keywords:

Saccharum spp., nitrogen, urea

Abstract

A still unclear question related to sugarcane cropping refers to the low response of the planted cane to nitrogen fertilization. Two experiments were carried out in areas under a Typic Hapludox, located in Pirassununga, São Paulo State, Brazil, and an Arenic Kandiudult, located in Jaboticabal, São Paulo State, Brazil, with the objective to evaluate planted cane response to nitrogen fertilization at planting. The experimental design was organized as random blocks and treatments consisted of three N rates (40, 80, and 120 kg ha-1 N-urea) and a control without N. Nitrogen fertilizers were applied to the bottom of the planting furrow and then incorporated into the soil. During the maximum growth stage, +1 leaf samples were collected from all experimental plots to evaluate the crop nutritional status. In the Pirassununga experiment, N fertilization at planting increased N, K, Mg, and S contents in the leaves and increased the stalk yield, without effect in the technological attributes. Conversely, no stalk yield response was observed at the Jaboticabal experiment, but N fertilization benefited the stalk technological attributes. The N rates increased the sugar yield per hectare in both experiments. The highest margin of agricultural contribution was obtained at the rate of 40 kg ha-1 N.

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Published

2010-10-01

Issue

Section

Soils and Plant Nutrition

How to Cite

Stalk yield and technological attributes of planted cane as related to nitrogen fertilization . (2010). Scientia Agricola, 67(5), 579-590. https://doi.org/10.1590/S0103-90162010000500012