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Título: | Análise de crescimento do capim Coastcross-1 sob adubação nitrogenada em duas idades de rebrotação |
Título(s) alternativo(s): | Growth analysis of Coastcross-1 bermudagrass grown under nitrogen doses at two regrowth ages |
Palavras-chave: | Plantas forrageiras - Adubação Cynodon dactylon Índice de área foliar Relação folha/colmo Forage plants - Fertilization Leaf area index Leaf/stem ratio |
Data do documento: | 2011 |
Editor: | Sociedade Brasileira de Zootecnia |
Citação: | PEREIRA, O. G. et al. Análise de crescimento do capim Coastcross-1 sob adubação nitrogenada em duas idades de rebrotação. Revista Brasileira de Zootecnia, Viçosa, MG, v. 40, n. 10, p. 2121-2128, 2011. |
Resumo: | The Coastcross-1 growth index in relation to five nitrogen doses (0, 100, 200, 300 and 400 kg/ha.year) and two regrowth ages (28 and 42 days) were evaluated. Nitrogen doses were arranged in a 5 × 2 factorial scheme in a randomized complete block design with three repetitions. Nitrogen fertilization was performed in three applications right after the forage harvesting. Higher values for leaf/stem and leaf weight ratio were observed at 28-d regrowth, in comparison with the 42 days of regrowth. Linear reduction of leaf/stem ratio from 1.6 to 1.0 at 0 and 133 kg N/ha.harvest, respectively was observed. The specific leaf area of bermudagrass at 28-d regrowth resulted in increased leaf area ratio (from 10.3 to 20.8 m2/kg with the increase of 0 to 133 kg N/ha. Harvest). At the absence of N treatment, specific leaf rate was higher at 42-d (14.3 m2/kg) in relation to the 28-d of regrowth (8.6 m2/kg). Regrowth age and nitrogen fertilization modify the pattern of forage accumulation and the characteristics of Coastcross-1 pasture. During the summer, the Coastcross-1 grass pasture fertilized with the highest N-dose should be managed at a younger regrowth age (28-d). |
URI: | http://repositorio.ufla.br/jspui/handle/1/41649 |
Aparece nas coleções: | DZO - Artigos publicados em periódicos |
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