La cobertura de semillas y los períodos de sequía en la temporada de lluvias interfieren con el éxito de la siembra directa en la restauración de áreas mineras en las sabanas tropicales

Among the limitations for use of direct seeding in ecological restoration severely degraded areas tropical grasslands, association between dry periods and an inhospitable substrate stands out. This work evaluated whether covering seed with a soil layer addition thin topsoil to interferes native plant establishment areas. The effect rainfall variations on results was also measured. seven species under four different conditions: 1) substrate, 2) covered by 1 cm layer, 3) 1cm 4) layer. In general, smaller seeds showed higher percentages treatments which were deposited substrate. Legume species, have larger seeds, achieved better percentage when beneficial Bulbostylis fimbriata —Cyperaceae—, while other null or harmful. Data that amount distribution affected rate. Direct is advantageous alternative grassland mining. Better knowledge sowing management behavior can contribute improving efficiency this technique.