African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6848

Full Length Research Paper

Effect of molybdenum and nitrogen rates on the growth and vegetative structure of Megathyrsusmaximus (Syn. Panicum maximum)

Alberto Chambela Neto
  • Alberto Chambela Neto
  • Federal Institute of Education, Science and Technology of Espírito Santo (IFES) – Santa Teresa Campus, Santa Teresa, ES, Brazil.
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Ismail Ramalho Haddade
  • Ismail Ramalho Haddade
  • Federal Institute of Education, Science and Technology of Espírito Santo (IFES) – Santa Teresa Campus, Santa Teresa, ES, Brazil.
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Paola Alfonsa Vieira Lo Monaco
  • Paola Alfonsa Vieira Lo Monaco
  • Federal Institute of Education, Science and Technology of Espírito Santo (IFES) – Santa Teresa Campus, Santa Teresa, ES, Brazil.
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Gustavo Haddad Souza Vieira
  • Gustavo Haddad Souza Vieira
  • Federal Institute of Education, Science and Technology of Espírito Santo (IFES) – Santa Teresa Campus, Santa Teresa, ES, Brazil.
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Renata Gomes da Silveira Deminicis
  • Renata Gomes da Silveira Deminicis
  • Secretary of Science, Technology and Innovation of the Mato Grosso State, Sinop - MT, Brazil.
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Bruno Borges Deminicis
  • Bruno Borges Deminicis
  • Federal University of Mato Grosso (UFMT) - Sinop Campus, Sinop, MT, Brazil.
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  •  Received: 27 September 2022
  •  Accepted: 01 December 2022
  •  Published: 30 June 2023

Abstract

The objective of this study was to identify the rate of molybdenum that when associated with nitrogen fertilization, would provide the best responses on the vegetative structure of Mombasa grass. Forty days after planting, a uniform pruning was made when the established levels of molybdenum were applied and the experimental period started. The experimental design was a randomized block, with four replications (blocks), in a 5×6 factorial scheme, considering the combinations of treatments, the combinations of five levels of molybdenum (0, 50, 100, 150 and 200 g ha-1 year-1), in six evaluation ages (days 7, 14, 21, 28, 35 and 42 after pruning for uniformization) and four rates of nitrogen (0, 100, 250 and 500 of N. ha-1 year-1). The variables were subjected to variance analysis and adjustment in regression using orthogonal polynomials. Among the variables, an assessment of the number of leaves that were fully expanded (exposed ligula), in development or senescent in the main tillers (NFCE, NFEE and NFS, respectively) was carried out, as well as the total number of tillers per pot (NP) and the height of the vegetation (ALT). The rise in molybdenum supplies up to 200 g ha-1 increases the production of vegetative biomass of mombasa grass in pastures, by using levels of 500 kg ha-1 year-1 of N, but there is no difference between the other doses of nitrogen (0, 100 and 250 ha-1 year-1).

Key words: Development, tropical grasses, intensive management of pastures, pots, biomass.