Structural and productive features of Panicum cultivars submitted to different rest periods in the irrigated semiarid region of Brazil

  • Jacqueline dos Santos Oliveira Mestranda em Zootecnia, UFLA Campus da UFLA - Aquenta Sol, Lavras - MG, 37200-000
  • João Virgínio Emerenciano Neto Professor Adjunto Universidade Federal do Vale do São Francisco Campus Ciências Agrárias Rodovia BR 407, Km 12 Lote 543 - Projeto de Irrigação Nilo Coelho - S/N C1 CEP: 56300-000 Petrolina/PE http://orcid.org/0000-0003-3060-9696
  • Gelson dos Santos Difante Doutorado em Zootecnia, UFVProfessor Associado da Universidade Federal do Mato Grosso do SulAvenida Senador Felinto Muller, 2443 Universitário79070900 - Campo Grande, MS
  • Fabio Nunes Lista Doutorado em Ciência Animal. UENFProfessor Associado da Universidade Federal do Vale do São Francisco, Campus Ciências Agrárias. Petrolina-PE. Rodovia BR 407, Km 12, Lote 543, Projeto de Irrigação Nilo Coelho
  • Rodrigo da Silva Santos Graduando em Engenharia Agronômica
  • Jessica Daisy do Vale Bezerra Graduanda em Zootecnia
  • Breno Ramon de Souza Bonfim Graduando em Zootecnia, UFRNCampus Ciências Agrárias. Petrolina-PE. Rodovia BR 407, Km 12, Lote 543, Projeto de Irrigação Nilo Coelho
  • Larissa Bezerra Soares Milhomens Graduada em Ciências Biológicas - UNIVASFCampus Ciências Agrárias. Petrolina-PE. Rodovia BR 407, Km 12, Lote 543, Projeto de Irrigação Nilo Coelho
  • Juliani Stephanie Medeiros Ribeiro Mestranda em Ciência Animal
Keywords: Accumulation rate., Forage mass., Morphological composition.

Abstract

The objective of this study was to evaluate the structural and productive features of Panicum maximum cultivars (Tanzânia, Mombaça, Massai, and Zuri) in three rest periods (30, 45 and 60 days), in the semiarid region of Brazil. The experiment was carried out in a completely randomized design with three replicates. The length of the leaf blade and the diameter of the stem increased as a function of the cut intervals. Leaf blade width and number of live leaves (3.86 leaves tiller-1) were not affected by cut intervals. The height of the canopy increased with the ages, with effect in the mass of forage, being the cv. Zuri the most productive with 148,75 cm e 18.297,49 kg ha-1 DM at 60 days. The highest masses of leaves and stems were obtained in the longest rest period, while the leaf/stem ratio decreased. In the cut-off interval of 45 days, the cultivars of Panicum maximum have shown satisfactory yield, and the smaller cut interval provides a reduction in canopy height and stem thickness.

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Published
2019-04-23
Section
Agricultural Sciences