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- Title
Tissue flow and biomass production of piatã grass in function of defoliation frequency and nitrogen fertilization.
- Authors
de Menezes, Bruna Biava; Paiva, Luísa Melville; Fernandes, Patrick Bezerra; Campos, Nathália Rafaela Fidelis; Barbosa, Rodrigo Amorim; de Lucca Bento, Anderson Luiz; Tulux Rocha, Raizza Fátima Abadía; da Graça Morais, Maria
- Abstract
Due to the multifactorial aspect between the morphogenetic, morphological and agronomic characteristics of the forage plants, it is necessary to look for management options that increase the production and the utilization of the mass of forage submitted to different frequencies of defoliation and nitrogen levels. The objective of this study was to verify the effects of two defoliation frequencies and two levels of nitrogen applied in a single dose on the morphogenetic, structural and forage production of piatan grass in the water period. The work was carried out in the agrostological field of the Faculty of Veterinary Medicine and Animal Science (UFMS), Campo Grande - MS. The experimental area was composed of 12 plots of 18 m² each of Brachiaria brizantha cv. Piatã (Syn. Urochloa brizantha cv. Piatã). The experimental design was completely randomized and the treatments consisted of two defoliation frequencies (with cut intervals of 28 and 35 days) and single application of two levels of nitrogen (100 and 200 kg ha-1 of N, in the form of urea). Therefore, piatan grass pastures can be managed with a single fertilization of 100 kg ha-1 of N, with height close to 30 cm, as the production of leaf blades is not compromised. The single application of high doses of N does not increase the number, but raises the individual weights of existing tillers without affecting the morphogenic and morphological characteristics of the forage canopy. For pastures of piatã grass established in soils of good fertility it is recommended as a management strategy to use 20 cm as minimum height of cut or grazing and frequency of with interval of 28 days and height of approximately 30 cm. In established pastures, in the water period, if it is desired to reduce the dose fractionation of N, it is recommended as a single application the dose of up to 100 kg of N ha-1 immediately after the first cut.
- Subjects
BIOMASS production; DEFOLIATION; FORAGE plants; ZOOLOGY; GRASSES; PASTURES
- Publication
Colloquium Agrariae, 2019, Vol 15, Issue 2, p92
- ISSN
1809-8215
- Publication type
Article
- DOI
10.5747/ca.2019.v15.n2.a288