Studies of the characteristics and possibilities of utilization the of Urban Solid Residue (U.S.R.) and specifically Urban Organic Solid Residue (U.O.S.R.) have not yet produced information in Brazil and in the world that permits sufficient knowledge for taking necessary decisions for immediate solutions that are demanded due to the increasing volume of residue produced. This work has as objective to study the effects of irrigation associated with the use of U.O.S.R. for growing eucalyptus seedlings. This research was developed at the São Paulo State University - UNESP - Jaboticabal, State of São Paulo, Brazil. The statistical design was a randomized in a factorial array. Eleven substrata were formulated using two types of soil, a EUTRUSTOX and a HAPLUSTOX, with and without chemical fertilization, six mixtures among soils and Urban Organic Solid Residue (U.O.S.R.), and pure U.O.S.R. Citriodora Hooker eucalyptus seeds were used in direct seeding in blocks of soil using two kinds of calculation of water quantity to be applied in the irrigation, through class A tank methods and weighing the substrata, in four levels (50%; 70%; 100% and 130% of evapotranspiration). The collected and statistically analyzed data showed that mixtures of 20% or more of U.O.S.R presented a harmful effect on plant development in soils for the production of eucalyptus seedlings by direct seeding.
organic residue; substrate; eucalyptus
