estrutura do capim-braquiária durante o diferimento da pastagem = signalgrass structure during pasture deferment
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2010
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Abstract
O experimento foi realizado para avaliar o número de perfilhos, a massa de forragem e de seus componentes morfológicos em pastos de Brachiaria decumbens cv. Basilisk durante o diferimento da pastagem. Os tratamentos foram quatro períodos de diferimento (18, 46, 74 e 121dias), a partir de 8/3/2004. O delineamento foi em blocos casualizados com duas repetições. Foram determinados os números de perfilhos vegetativos (PV), reprodutivos (PR) e mortos (PM), bem como as massas de lâmina foliar verde (MLV), colmo verde (MCV) e forragemmorta (MFM). Durante o período de diferimento houve redução no número de PV (de 1.491 para 944 perfilhos m-2). Os números de PR e PM não foram influenciados pelo período de diferimento e suas médias foram 211 e 456 perfilhos m-2, respectivamente. O período de diferimento causou incremento nas MCV (de 2.965 para 4.877 kg ha-1 de massa seca) e MFM (2.324 para 4.823 kg ha-1 de massa seca), porém não influenciou a MLV (em média, 2.047 kg ha-1 de massa seca). Em Viçosa, Estado de Minas Gerais, o pasto de B. decumbens, adubado com nitrogênio e diferido no início de março, pode permanecer diferido por cerca de 70 dias para conciliar produção de forragem em quantidade com boa composição morfológica.
This experiment was performed aiming to evaluate tiller population density, forage mass and its morphological components on pastures of Brachiaria decumbens cv. Basilisk. during deferment. The treatments encompassed four deferred grazing periods (18, 46, 74 and 121 days). Arandomized block design with two replications was used. The numbers of vegetative tillers (VT), reproductive tillers (RT) and dead tillers (DT) in the pasture were determined. The masses of green leaf blade (GLBM), dead stem (DSM) and dead forage (DFM) were alsodetermined. There was a reduction in the number of VT (from 1,491 to 944 tiller m-2) during the deferment period. RT and DT numbers were not influenced by the deferment periods. Their averages were 211 and 456 tiller m-2, respectively. Longer deferring periods resulted in an increase in GSM (from 2,965 to 4,877 kg ha-1 of dry mass) and DFM (from 2,324 to 4,823 kg ha-1 of dry mass), but it did not influence GLBM (average of 2,047 kg ha-1 of dry mass). In Viçosa, Minas Gerais State, Brazil, Brachiaria decumbens cv. Basilisk pasture fertilized and deferred in the beginning of March must be kept deferred for about 70 days in order to conciliate both quality and quantity forage production.
This experiment was performed aiming to evaluate tiller population density, forage mass and its morphological components on pastures of Brachiaria decumbens cv. Basilisk. during deferment. The treatments encompassed four deferred grazing periods (18, 46, 74 and 121 days). Arandomized block design with two replications was used. The numbers of vegetative tillers (VT), reproductive tillers (RT) and dead tillers (DT) in the pasture were determined. The masses of green leaf blade (GLBM), dead stem (DSM) and dead forage (DFM) were alsodetermined. There was a reduction in the number of VT (from 1,491 to 944 tiller m-2) during the deferment period. RT and DT numbers were not influenced by the deferment periods. Their averages were 211 and 456 tiller m-2, respectively. Longer deferring periods resulted in an increase in GSM (from 2,965 to 4,877 kg ha-1 of dry mass) and DFM (from 2,324 to 4,823 kg ha-1 of dry mass), but it did not influence GLBM (average of 2,047 kg ha-1 of dry mass). In Viçosa, Minas Gerais State, Brazil, Brachiaria decumbens cv. Basilisk pasture fertilized and deferred in the beginning of March must be kept deferred for about 70 days in order to conciliate both quality and quantity forage production.
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| Authors | ;Manoel Eduardo Rozalino Santos;Dilermando Miranda da Fonseca;Virgilio Mesquita Gomes;Eric Márcio Balbino;Marcela Azevedo Magalhães |
| Journal | human resource management journal |
| Year | 2010 |
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| Keywords | Keywords not found |
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