Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun

Authors

  • Leonardo Bernardes Taverny de Oliveira Universidade Federal do Tocantins
  • Antonio Clementino dos Santos Universidade Federal do Tocantins
  • Hugo Mariano Rodrigues de Oliveira Instituo Tocantinense Presidente Antônio Carlos
  • Tiago Barbalho André Instituo Tocantinense Presidente Antônio Carlos
  • Durval Nolasco das Neves Neto Instituo Tocantinense Presidente Antônio Carlos
  • Otacílio Silveira Júnior Instituto Federal do Tocantins

DOI:

https://doi.org/10.5433/1679-0359.2018v39n4p1447

Keywords:

Cycles, Macronutrients, Multivariate, Panicum maximum.

Abstract

The objective of this study is to identify qualitative and productive changes in Mombasa grass under a livestock-forest system or full sun and to classify the variables that are most relevant for evaluating the qualitative performance of these systems. The experiments were conducted in shade areas, with four replications for each of the 12 treatments, including four growth cycles and three levels of shading in Mombasa grass, totaling 48 experimental units. Calcium (Ca), magnesium (Mg), potassium (K), phosphorus (P), nitrogen (N) and dry mass production (DMP) (kg ha-1) were used as discriminatory variables for the shading groups. The levels of nutrients and shading in Mombaça grass were classified using Fisher multivariate discriminant analysis (FMDA). The FDMA indicated that Mg, K, P, N, and DMP formed a discriminant function. However, DMP was the least important variable for identifying the groups. Five groups were pre-defined before FDMA: MFS 2 (Mombasa grass in full sun in the second cycle), MFS 6 (Mombasa grass in full sun in the sixth cycle), MFS 7 (Mombasa grass in full sun in the seventh cycle), M25 4 (Mombasa grass at 25% shading in the fourth cycle), and M25 7 (Mombasa grass at 25% shading in the seventh cycle). The results indicate that Mg, P, K, and N are helpful for identifying new genotypes of plants grown on shading conditions because of the responsiveness and stability of these elements to environmental changes.

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Author Biographies

Leonardo Bernardes Taverny de Oliveira, Universidade Federal do Tocantins

Bolsista do Programa Nacional de Pós-Doutorado-PNPD/CAPES, Programa de Pós-Graduação em Ciência Animal Tropical, Universidade Federal do Tocantins-UFT, TO, Brasil.

Antonio Clementino dos Santos, Universidade Federal do Tocantins

Prof., Universidade Federal do Tocantins, UFT, Araguaína, TO, Brasil. Bolsista de produtividade, CNPq.

Hugo Mariano Rodrigues de Oliveira, Instituo Tocantinense Presidente Antônio Carlos

Prof., Instituo Tocantinense Presidente Antônio Carlos, UNITPAC, Araguaína, TO, Brasil.

Tiago Barbalho André, Instituo Tocantinense Presidente Antônio Carlos

Prof., Instituo Tocantinense Presidente Antônio Carlos, UNITPAC, Araguaína, TO, Brasil.

Durval Nolasco das Neves Neto, Instituo Tocantinense Presidente Antônio Carlos

Prof., Instituo Tocantinense Presidente Antônio Carlos, UNITPAC, Araguaína, TO, Brasil.

Otacílio Silveira Júnior, Instituto Federal do Tocantins

Técnico Laboratório de Solos, Instituto Federal do Tocantins, IFTO, Dianópolis, TO, Brasil.

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Published

2018-08-02

How to Cite

Oliveira, L. B. T. de, Santos, A. C. dos, Oliveira, H. M. R. de, André, T. B., Neves Neto, D. N. das, & Silveira Júnior, O. (2018). Characteristics and classification of the quality and productive standards of the mombaça grass under a livestock-forest system or full sun. Semina: Ciências Agrárias, 39(4), 1447–1458. https://doi.org/10.5433/1679-0359.2018v39n4p1447

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