Abstract
The objective was evaluating the effect of plant spacing on seed yield and quality in Bracchiaria brizantha cv. Marandu. The experiment was carried out in rain fed conditions in 2007 at the Universidad de Papaloapan, Loma Bonita, Oaxaca, Mexico. Six plant distances (broadcast, 25*25 cm, 50*50 cm, 75*75 cm, 100*100 cm and 125*125 cm between rows and plants, respectively) were assessed. To that end, a completely randomized block design with four replicates was set. The following variables were analyzed: pure seed yield (PSY), pure germinable seed yield (GPSY), number of panicles per m-2, panicle length,seed harvested per panicle, 1,000 seed weight, spikelet abscission rate, seed purity and germination. PSY and GPSY showed differences among treatments (P 0.05). As a conclusion, it can be stated that the largest seed yield was obtained at the 25*25 cm spacing between rows and plants, respectively. Seed germination did not improve in any of the treatments being assessed.
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