This study aimed to evaluate the effects of the use of two grazing management
strategies with nitrogen fertilization in Marandu grass, looking for possible
advantages in adopting such practices in ecotone Cerrado-Amazon. The
experiment evaluated morphogenesis, structural, agronomic and productive
Marandu grass. This was conducted in a randomized block design in a split plot
arrangement with 4x2 with 4 blocks. The treatments consisted of combinations
between two rest periods and four doses of nitrogen, with rest periods of 28 days
(PD28days) and height of 40 cm (PD40cm) and nitrogen doses of 0, 150, 300 and 450
kg N.ha-1.year-1, applied in the form of ammonium sulfate. Allowed to check through
the morphogenetic and structural variables that the best rates for PD40cm were
obtained when there was application in the range 280-333 kg N.ha-1, while the dose
of 450 kg N.ha-1 was which obtained more desired results for PD28days. It was also
found that the use of strategy PD40cm promoted the reduction of responses because
of senescence, driven by increased nitrogen fertilization, demonstrated by the
reduction of TSF, NFM and increased DVF. The use of height to set the rest period
has reduced the day interval for the entry of animals for food when there was a
greater application of nitrogen. The height of 40 cm was shown to be above the
ideal point for collecting Marandu grass is recommended ratings with lower heights
to ecotone Cerrado-Amazon.
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