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- Title
FREQUÊNCIA E SEVERIDADE DE DESFOLHAÇÃO EM ECÓTIPOS DE Brachiaria brizantha SOB LOTAÇÃO INTERMITENTE.
- Authors
Bezerra Fernandes, Patrick; Amorim Barbosa, Rodrigo
- Abstract
Understanding the dynamics of defoliation is essential in the analysis of vegetation and animal response in different production systems and should be a fundamental part of the studies on grazing management. Therefore, the purpose of this study was to evaluate the defoliation pattern in Brachiariabrizantha pastures, with distinct structures, under intermittent grazing. The experiment was carried out in the area belonging to the Brazilian Agricultural and Livestock Research Corporation (Embrapa) - Beef Cattle, Campo Grande - MS. The treatments used Brachiariabrizantha ecotypes B4, BRS Paiaguás and cv. Xaraés. The experimental period was divided according to the seasons (rainy and dry). The frequency and severity of defoliation of individual tillers were evaluated prior to the entry of the animals into the paddocks and throughout the grazing period. No seasonal effect was observed on the frequency of leaf blight defoliation and extended tiller disease. In the dry season, an increase in leaf defoliation severity by leaf category could be observed. The defoliation of individual tillers followed the adjustment in the grazing density, presenting little variation among the pastures studied. As the period of occupation progressed, the animal explored the lower extracts of the forage canopy in different proportions. The variations in the structural characteristics of the forage canopy implied in few differences in the dynamics of defoliation in the B. brizantha pastures. The adjustment in grazing density showed little influence in the removal of leaf blades among the B. brizantha pastures. As the age of leaf blades advanced, defoliation was reduced.
- Publication
Arquivos de Ciências Veterinárias e Zoologia da Unipar, 2018, Vol 21, Issue 3, p135
- ISSN
1415-8167
- Publication type
Article
- DOI
10.25110/arqvet.v21i3.2018.6666