Crescimento e alocação de fitomassa de cinco gramíneas forrageiras em condições de Cerrado
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Data
2009
Título da Revista
ISSN da Revista
Título de Volume
Editor
Vera Lúcia Gomes Klein
Resumo
Forage grasses are dominant species in Brazilian pastures, among which we can mention
Brachiaria decumbens, B. brizantha cv. Marandu, Panicum maximum cv. Colonião, Tanzania, and
Mombaça. The present study was carried out to better understand the growth of these forage species
as well the partitioning of dry mass among the different organs of the canopy at different stages of their
development. A completely randomized block design was used with five treatments and four repetitions.
B. decumbens produced the highest number of tillers (NT). Mombaça produced the highest total dry
mass (TDM) up to 55 days after emergence (DAE), but from 62 DAE on the productions of all the species
did not differ statistically. Mombaça had the highest leaf area index (LAI). The allocation of phytomass
incorporated as stem dry matter (SDM) was higher than that allocated to the production of dry matter of
green leaves (DMGL), from 41 DAE for B. decumbens, P. maximum cv. Colonião and Tanzania, 55 DAE
for cv. Mombaça, and 62 DAE for B. brizantha. The maximum instantaneous crop growth rates (CGR)
were achieved at 62 DAE: B. decumbens - 37.1 g m-2 day-1, B. brizantha - 49.2 g m-2 day-1, P. maximum
cv. Colonião - 54.7 g m-2 day-1, cv. Tanzania - 55.7 g m-2 day-1, cv. Mombaça - 45.4 g m-2 day-1.
Descrição
v. 6, n. 2, p. 1-14, 2009.
Palavras-chave
Análise de crescimento, Brachiaria, Matéria seca, Panicum, Taxa assimilatória líquida
Citação
PORTES, Tomás de Aquino; CARVALHO, Sabrina Isabel Costa de. Crescimento e alocação de fitomassa de cinco gramíneas forrageiras em condições de Cerrado. Revista de Biologia Neotropical, v. 6, n. 2, p. 1-14, 2009. Disponível em: <http://www.revistas.ufg.br/index.php/RBN/article/view/13892/8849>.