Tomato plant growth and SPAD index in different nitrogen sources and levels

Authors

  • John Silva Porto UESB
  • Rafael de Queiroz Costa
  • Tiyoko Nair Hojo Rebouças
  • Odair Lacerda Lemos
  • José Magno Queiroz Luz
  • Yuri Ferreira Amorim

Keywords:

Solanum lycopersicum, chlorophyll, nitrogen fertilization.

Abstract

Nitrogen is one element required by plants, so the levels these nutrient present in plant tissues directly interferes on growth, development and production. The type of fertilizer and the under or over fertilization can significantly affect agricultural production in this context. Aim this study was to evaluate the effects of different nitrogen sources and levels on tomato plants growth and development. The experiment conducted at State University of Southwest Bahia, Vitória da Conquista – BA. The experimental design randomized complete block, with four replications in factorial 3 x 3 + 1, using 3 sources of nitrogen (calcium nitrate, urea and ammonium sulfate) and 3 doses (140, 280 and 420 kg ha -1) and an absolute control. The relative growth rate, height, main stem diameter, shoots dry mass and SPAD index analyzed. The height, stem diameter and SPAD increased linearly according to increase of N rates, while plants treated with NO3- had higher dry mass and SPAD reading.

References

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Published

2014-11-06

How to Cite

Porto, J. S., de Queiroz Costa, R., Hojo Rebouças, T. N., Lacerda Lemos, O., Queiroz Luz, J. M., & Ferreira Amorim, Y. (2014). Tomato plant growth and SPAD index in different nitrogen sources and levels. Scientia Plena, 10(11). Retrieved from https://scientiaplena.org.br/sp/article/view/2041

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