A b s t r A c tAiming to know and understanding the physiological and productive forages species traits potentially to get involved into silvopastoral systems, this experiment were conducted at nurserys (17°c) and direct sown (22°c) conditions. the experimental station "La Esperanza" is in Fusagasugá, colombia at 4°16´34´´N and 23´11´´´W, 1750 masl, 20°c average temperature, 1200 mm/year, 81% rH, 1387 light hour/year. the sampling were realized each eight (8) days and assessing variability in growth, cumulative leaf area, aboveground biomass, mean relative growth rate, mean net assimilation rate, and mean leaf area ratio related to forages specie Hibiscus rosa-sinensis L. Moreover were evaluated a distribution roots model. Plant species widely differ in their grown potential when they are grown under different conditions. the results shown that H. rosa-sinensis rising in nursery conditions had a more elongated, greater radial growth and gravitrópic roots than those of direct planting plants. the ratio between roots and shoot is strongly and positive related to the nursery (0.75) and poor in direct sown (0.16) conditions during 105 days after planting (dap). Also another factor as physiology (the net assimilation rate, specific leaf area, leaf area ratio) can explain the difference in rGr (relative growth rate) between species grown in nursery and direct planting conditions. At this stage (105 days) the plants shown the highest values on relative growth and net assimilation rate in nursery conditions. Furthermore the Hibiscus rosa-sinensis specie require grown in a nursery phase until 98 days to optimum conditions to planting in open fields. Fees and physiological indices (tAN, rAF, sLA, LAI, rGr) allow us to propose the species Hibiscus rosa-sinensis as an optimal plant silvopastoral systems and cultural planning and agricultural work as a forage.
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