Emergency and initial growth of seedlings Enterolobium contortisiliquum (Vell.) Morong on different substrates

Abstract

The species Enterolobium contortisiliquum (Vell.) Morong widely distributed in Brazil is quite suitable for the reforestation of deforested areas. The removal of native vegetation in different Brazil’s ecosystems induces the need for studies on the acquisition quality seedlings of forest, the substrate being necessary to obtain satisfactory results. The study was to evaluate the efficiency of different substrates on the seedling emergence and initial growth of E. contortisiliquum. The experiment was conducted in greenhouse belongings to the department of Plant and Environmental Sciences at the Center for Agricultural Sciences (CCA) of the Federal University of Paraíba (UFPB), Areia-PB, following a completely randomized design. The treatments were substrates made from the mixture of sand (75-100%) subsoil (75-100%), vermiculite (50-100%) wood powder (25-50%), coconut powder (25-50%) and carbonated rice husk (25-50%). To evaluate the effect of treatments was determined by the following characteristics: percentage of emergence, speed of emergence index, relative frequency of emergency, length and dry mass of shoots and roots of seedlings. The incorporation of 50% carbonated rice husk, sawdust or vermiculite, coconut fiber to provide high seedling emergence of E. contortisiliquum.