Use of biossolid in plantation of atlantic forest species

Abstract

Treated sewage sludge, called biosolid, contains high levels of macronutrients (N, P, Ca, and Mg) and organic matter; therefore, it has great potential for soil fertilization during the implantation of reforestation. Two completely randomized field experiments were carried out in a sandy texture Planosol at Seropédica, RJ. In the first one, initiated in April 2015, the effect of four doses of biosolid (0, 2, 4 and 8 L per plant) and one dose with mineral fertilization (amount of nutrients equivalent to the dose of 4 L of biosolid) on the survival, growth and nutrition of the species Schinus terebinthifolius Radd. (aroeira), Lafoensia glyptocarpa KOEHNE (mirindiba), Inga laurina (Sw.) Willd. (ingá-laurina), e Senna multijuga (Rich.) (pau-cigarra). In the second experiment, started in March 2016 and under the same treatments, the following species were evaluated for 9 months: Genipa americana (Vell.) Brenan (jenipapo), Peltophorum dubium (Spreng.) Taub (farinha-seca) and Enterolobium contortisiliquum (Vell.) Morong (orelha-de-negro). Increasing doses of biosolid increased the growth rate of S.Terebinthifolius and P. dubium. However, the higher dose (8 L) reduced the growth of S. multijuga by up to 50%, while I. laurina, G. americana and E. contortisiliquum did not have their growth affected by the application of biosolids. The application of biosolid increased the leaf content of S in I. laurina, P and Ca in L. glyptocarpa, and Mg in S. multijuga, but it reduced the content of P in G. americana. It can be concluded that the species S.Terebinthifolius, L glyptocarpa, P. dubium, I. laurina and S. multijuga benefited from the dose of biosolid of 4 L per plant, either due to the higher growth rate or the higher accumulation of macronutrients.