Morphogenesis and production of tanzânia, mombaça and mulato grasses under nitrogen fertilization

  • Deise Dalazen Castagnara Universidade Estadual do Oeste do Paraná
  • Eduardo Eustáquio Mesquita Universidade Estadual do Oeste do Paraná
  • Marcela Abbado Neres Universidade Estadual do Oeste do Paraná
  • Paulo Sérgio Rabello de Oliveira Universidade Estadual do Oeste do Paraná
  • Tiago Zoz Faculdade de Ciências Agronômicas - Universidade Estadual Paulista, UNESP, Botucatu/SP
  • André Zoz Universidade Estadual do Oeste do Paraná

Abstract

A field trial was conducted designed in a completely randomized block in a 4 x 3 factorial arrangement to evaluate the application of nitrogen doses (N) (0, 40, 80 and 160 kg/ha) on the morphogenical characteristics and dry matter partition of three forage grasses (Panicum maximum cvs. Mombasa and Tanzania and Brachiaria sp. Hybrid Mulato). The leaf appearance (LAR, leaf/day) and stretching (LER; mm/day) rates, the number of green leaves per tiller (NLT) and the average weight of tillers (MTW; g) presented s positive linear response to the N dose while the phyllochron (Phil; day/leaves) showed a negative linear response. The highest LER, IAL and final leaf length (FLL; cm) occurred in the Mombaça and Tanzania grasses, while the highest LAR occurred in the Mulato grass. There was a negative quadratic effect of the N dose on the stem elongation rate (SER; mm/day) and LF. The Mombaça and Tanzania grasses presented the highest SER; however, in just two forages. The production of total dry matter (TDM; kg/ha), leaves (LDM; kg/ha) and stems (SDM; kg/ha) increased linearly and quadratically with the N dose, respectively, for the Mombaça and Tanzania grasses. There was a high positive correlation among DM, LDM and SDM and the Mombaça grass MTW. The dry matter production and morphogenic characteristics were influenced by the nitrogen fertilization as a result of the substantial increase in the flow of tissues stimulated by fertilization, proving the importance of N for forage biomass accumulation.

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Author Biographies

Deise Dalazen Castagnara, Universidade Estadual do Oeste do Paraná
Doutoranda do Programa de Pós Graduação em Agronomia
Eduardo Eustáquio Mesquita, Universidade Estadual do Oeste do Paraná
Professor do Centro de Ciências Agrárias
Marcela Abbado Neres, Universidade Estadual do Oeste do Paraná
Professora do Centro de Ciências Agrárias
Paulo Sérgio Rabello de Oliveira, Universidade Estadual do Oeste do Paraná
Professor do Centro de Ciências Agrárias
Tiago Zoz, Faculdade de Ciências Agronômicas - Universidade Estadual Paulista, UNESP, Botucatu/SP
Mestrando em Agricultura
André Zoz, Universidade Estadual do Oeste do Paraná
Graduando em Agronomia
Published
2013-11-20
How to Cite
Castagnara, D. D., Mesquita, E. E., Neres, M. A., Oliveira, P. S. R. de, Zoz, T., & Zoz, A. (2013). Morphogenesis and production of tanzânia, mombaça and mulato grasses under nitrogen fertilization . Bioscience Journal, 30(3). Retrieved from http://www.seer.ufu.br/index.php/biosciencejournal/article/view/14142
Section
Agricultural Sciences