Irrigation depths and nitrogen levels for forage oat (Avena sativa L.) production

Authors

  • J. A. Frizzone USP; ESALQ; Dep. de Engenharia. Rural
  • R. E. F. Teodoro UFU; Dep. de Agronomia
  • A. S. Pereira USP; ESALQ; Dep. de Engenharia. Rural
  • T. A. Botrel USP; ESALQ; Dep. de Engenharia. Rural

DOI:

https://doi.org/10.1590/S0103-90161995000300027

Keywords:

suplemental irrigation, nitrogen fertilization, optimal levels, net return

Abstract

This study was conducted to determine the effects of supplemental irrigation and nitrogen fertilization on forage oat (Avena sativa, L.) productivity, variety UPF7. The experiment was a split-plot randomized block design with four replications. The experimental unit consisted of combinations of four irrigation depths applied when cumulative Classe A pan evaporation (ECA) approximately reached 30 mm, (I = 0%, I = 50%, I = 100% and I = 150% of ECA), and four nitrogen levels (N = O, N = 80, N = 160 e N = 240 kg.ha-1). The total maximum productivity of dry matter (6,9 t.ha-1) was obtained for the water depth of 319,2 mm and 152,4 kg.ha-1 of nitrogen. For the considered prices, the water and nitrogen levels that induced the maximum net income were 310 mm and 120 kg.ha-1, respectively, reaching a maximum net return of R$ 897.ha-1.

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Published

1995-12-01

Issue

Section

Articles

How to Cite

Irrigation depths and nitrogen levels for forage oat (Avena sativa L.) production . (1995). Scientia Agricola, 52(3), 578-586. https://doi.org/10.1590/S0103-90161995000300027