Production and chemical composition of hybrid Brachiaria cv. Mulato II under a system of cuts and nitrogen fertilization

Authors

  • Danilo Leal Marques Universidade Federal de Goias
  • Aldi Fernandes de Souza França Universidade Federal de Goias
  • Leonardo Guimaraes Oliveira Universidade Federal de Goias
  • Emmanuel Arnhold Universidade Federal de Goias
  • Reginaldo Nassar Ferreira Universidade Federal de Goias
  • Daniel Staciarini Correa Universidade Federal de Goias
  • Debora Carvalho Bastos Universidade Federal de Goias
  • Ludmilla Costa Brunes Universidade Federal de Goiás

DOI:

https://doi.org/10.14393/BJ-v33n3-32956

Keywords:

ANR, Bromatological composition, Chemical fertilizers, EANC

Abstract

The production capacity of green and dry mass of the entire plant, efficiency of N conversion, apparent N recovery and the chemical composition of cultivar Mulato II was evaluated under a system of cuts and nitrogen doses. The assay, conducted in the municipality of Goiânia, GO, Brazil, had a totally randomized 2 x 4 factorial design (2 height cuts, 0.40 and 0.50 m and 4 nitrogen doses), with three replications and subdivided subplots. Treatments comprised four N doses (0, 50, 100 and 150 kgha-1 N, with urea as nitrogen source). There was no significant interaction (p>0.05) between N doses and cut heights for the variables productivity of green (PGM) and dry (PDM) mass, nitrogen use efficiency (NUE) and apparent N recovery (ANR), which were neither affected (p<0.05) by N doses nor by evaluated cut heights. Average productivity reached 59,450 kgha-1 (PGV) and 10,367 kgha-1 (PDM) and it was produced an average of 19.62 kg of DM per kg of N, with a mean 56.00% recovery. N doses and cut heights did not affect (p>0.05) DM rates of the plant, whilst mean dry matter rate was 17.49%. CP rates were affected (p<0.05) by N doses (0, 50, 100 and 150 kgha-1) and cut heights (0.40 and 0.50 m) and by the interaction of these factors. CP rates of the entire plant hybrid Brachiaria cv. Mulato II increased (p<0.05) due to N doses through an increasing linear relationship. Since there was a significant effect (p<0.05) with regard to cut height and CP rates decreased with height increase. NDF rates were significantly influenced by N doses (p<0.05) and by cut heights (p<0.05), with significance for the interaction (p<0.05) of over 100 kgha-1 N doses only. No significant interaction (p>0.05) occurred in ADF rates among the variables analyzed. ADF contents were influenced by N supply (p<0.05) with decreasing quadratic regression as N doses increased.

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Published

2017-05-24

Issue

Section

Agricultural Sciences

How to Cite

Production and chemical composition of hybrid Brachiaria cv. Mulato II under a system of cuts and nitrogen fertilization . Bioscience Journal [online], 2017. [online], vol. 33, no. 3, pp. 685–696. [Accessed4 April 2025]. DOI 10.14393/BJ-v33n3-32956. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/32956.