Print version ISSN 0100-6762
COUTINHO, Marcos Pellegrini et al. Substrate from clay extraction area enriched with agroindustrial and urban byproducts for sesbânia seedlings cultivation. Rev. Árvore [online]. 2006, vol.30, n.1, pp. 147-153. ISSN 0100-6762. http://dx.doi.org/10.1590/S0100-67622006000100018.
The objective of this work was to evaluate Sesbania virgata (Cav.) Pers. seedling growth, in greenhouse condition, cultivated in a substrate collected in a clay extraction area and fertilized with organic byproducts. The seedlings were grown in containers (5 L) filled with this growth medium and fertilized with "ferkal", urban waste and sugar cane filter cake in different doses (40, 80, 120 and 160 g dm-3) and compared to the control treatment (substrate without fertilization). The experiment was carried out in a completely randomized design, with five replicates of one seedling. Four months after sowing, stem height, root collar diameter, shoot and lateral roots dry matter were evaluated. Length, superficial area and mycorrhizal colonization of the roots were evaluated, as well as the N, P and K content of the leaves. The control seedlings showed higher values for stem height, root collar diameter and shoot dry matter. However, no difference related to the root dry matter length, root superficial area, and mycorrhizal colonization among the treatments were observed. Growth tendency of the shoot morphological characteristics of the seedlings was observed with increasing doses. The N, P and K leaf content was lower without addition of the byproducts in relation to the fertilized seedlings. Sesbania seedlings can be planted in substrate from clay extraction area, without additional expenses with organic fertilizers. However, the addition of studied byproducts can promote the formation of a richer nutritional litter.
Keywords : Legume; urban waste compost; ferkal; sugar cane filter cake; degraded area.