Sheep manure fertilization in Mimosa caesalpiniifolia in an Albaquult/Adubacao com esterco ovino em Mimosa caesalpiniifolia em um Planossolo

• Published in: Revista brasileira de engenharia agrícola e ambiental 2021-04, Vol.25 (4), p.243
• Main Authors: de Souza, Henrique A, Pompeu, Roberto C.F.F, Tonucci, Rafael G, Fernandes, Francisco E.P, Araujo, Maria D.M, Leite, Luiz F.C
• Format: Article
• Language: English
• ISSN: 1415-4366
• DOI: 10.1590/1807-1929/agriambi.v25n4p243-249

The use of organic fertilizers can increase the production of forest species for the extraction of wood from monoculture stands or integrated systems. This study aimed to evaluate the effect of applying doses of sheep manure on the biometric traits of Mimosa caesalpiniifolia ('sabia') in a silviculture system in an area previously occupied by native degraded pasture in an Albaquult. The experimental design was randomized blocks with four repetitions, with treatments corresponding to five doses of sheep manure per plant: 0, 2, 4, 8, and 12 kg in the first year, while in the second year the double of the doses (0, 4, 8, 16 and 32 kg per plant) were applied as topdressing under the canopy. The following biometric variables were evaluated: height (H); root collar diameter (RCD); diameter at breast height (DBH); above-ground dry weight (AGDW); accumulation of nutrients (aerial part); and soil fertility. The plants were responsive to the organic fertilization regarding the variables H, DBH, and AGDW. The sheep manure increased the mean values of pH, P, K, Ca, Mg, SB, CEC, BS, S-S[O.sub.4.sup.2-] and Zn, and reduced the potential acidity in the 0-0.20 m soil layer. The organic matter variable increased up to the dose of 13.70 kg per plant. The accumulation rates of macro and micronutrients in the 'sabia' plants were N > Ca > K > Mg > P > S and Fe > Mn > B > Zn > Cu, respectively. Key words: organic fertilizers, soil fertility, semiarid region O uso de adubos organicos pode incrementar a producao de especies florestais, as quais podem ser usadas para extracao de madeira em monocultivos ou em sistemas integrados. Objetivou-se neste estudo, avaliar a aplicacao de doses de esterco de ovino na implantacao de Mimosa caesalpiniifolia (sabia) em sistema silviagricola, de uma area anteriormente ocupada por pastagem degradada em um Albaquult (Planossolo Haplico). O delineamento experimental foi em blocos casualizados, com quatro repeticoes, e os tratamentos corresponderam as seguintes doses: 0, 2; 4; 8 e 12 kg de esterco de ovino por planta no primeiro ano, cujas quantidades empregadas foram reaplicadas em dobro (0, 4, 8, 16 e 32 kg por planta) no ano seguinte na projecao da copa. As variaveis avaliadas corresponderam aos atributos biometricos: altura (ALT); diametro do colmo ou coleto (DC) e diametro na altura do peito (DAP); massa seca da parte aerea (MSPA); acumulo de nutrientes (parte aerea); e fertilidade do solo. As plantas de sabia foram responsivas a adubacao organ