Initial height of pasture deferred and utilized in winter and tillering dynamics of signal grass during the following spring

• Autor(a) principal: Santana, Sabrina Saraiva [UNESP]
• Data de Publicação: 2014
• Outros Autores: Fonseca, Dilermando Miranda Da, Santos, Manoel Eduardo Rozalino, Sousa, Braulio Maia De Lana, Gomes, Virgílio Mesquita, Nascimento Júnior, Domicio Do
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.4025/actascianimsci.v36i1.20463; http://hdl.handle.net/11449/109673
• topic: Brachiaria decumbens; diferimento da pastagem; ecofisiologia vegetal; estacionalidade; Brachiaria decumbens; pasture deferment; plant ecophysiology; seasonality

Tillering dynamics during regrowth in the spring (September to December 2009) on signal grass (Brachiaria decumbens cv. Basilisk) pastures deferred in the beginning of April 2009 is evaluated. Four pasture heights were evaluated at the beginning of deferment (10, 20, 30 and 40 cm). The experimental design consisted of completely randomized blocks with two replications. Rise in pasture height at the beginning of deferment decreased the appearance rate, increased the mortality rate and reduced the survival rate, the balance between appearance and mortality and the stability index of the tiller population at the beginning of the spring. Pastures deferred at initial height of 30 and 40 cm presented relatively stable tiller appearance rate between the beginning and end of spring. However, these pastures presented greater mortality rate, lower survival rate, lower balance between appearance and mortality and lower stability index of the tiller population at the beginning of spring when compared to rates at the end of spring. Pastures managed with shorter initial heights (10 and 20 cm) provided more tissue renewal in the subsequent growth season after their utilization in the winter.