Ciência Rural (Dec 2017)

Soil solution and plant nitrogen on irrigated rice under controlled release nitrogen fertilizers

  • Thais Antolini Veçozzi,
  • Rogério Oliveira de Sousa,
  • Walkyria Bueno Scivittaro,
  • Cristiano Weinert,
  • Victor Raul Cieza Tarrillo

DOI
https://doi.org/10.1590/0103-8478cr20170279
Journal volume & issue
Vol. 48, no. 1

Abstract

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ABSTRACT: A study was conducted to evaluate the solubilization and nitrogen (N) use efficiency (NUE) of controlled release nitrogen fertilizers in irrigated rice, compared to urea. It was developed under semi-controlled conditions, including five treatments: Control, Splitted Urea (pre-sowing and topdressing), Pre-sowing urea, and Polymer Coated Urea (PCU) with 60-day and 90-day release. PCUs did not maintain high NH4 + and NO3 - levels in solution over a longer period than urea. NUE of PCUs was similar to uncoated urea, not increasing nutrient release in irrigated rice field.

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