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

Authors

  • Deise Dalazen Castagnara Universidade Federal do Pampa
  • 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 Universidade Estadual Paulista
  • 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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Published

2014-06-10

How to Cite

CASTAGNARA, D.D., MESQUITA, E.E., NERES, M.A., OLIVEIRA, P.S.R. de, ZOZ, T. and ZOZ, A., 2014. Morphogenesis and production of tanzânia, mombaça and mulato grasses under nitrogen fertilization . Bioscience Journal [online], vol. 30, pp. 45–54. [Accessed5 December 2022]. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/14142.

Issue

Section

Agricultural Sciences