Desenvolvimento inicial da amburana (Amburana cearensis) em áreas de Cerrado degradado

• Autor(a) principal: Duboc, Eny
• Data de Publicação: 2013
• Outros Autores: Guerrini, Iraê Amaral [UNESP]
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://www.infoteca.cnptia.embrapa.br/bitstream/doc/966398/1/BP201363.pdf; http://hdl.handle.net/11449/137615
• topic: Medicinal and timber tree; Nitrogen; Phosphorus; Reforestation; Gallery forest; Savanna biome; Árvore medicinal; Madeireira; Nitrogênio; Fósforo; Reflorestamento; Mata de Galeria

The aim of this study was to determine the effect of nitrogen (N) and the phosphorus (P) in seedlings of Amburana cearensis planted in areas occupied by Brachiaria decumbens, in an Oxisol, which originally had a Dense Savanna and in a Plinthic surrounding a Gallery Forest. We evaluated the response of A. cearensisgrowth and survival in the absence and doses of -1 10, 20 and 40 kg ha N, as urea and absence and doses of 10, 20 and -1 40 kg ha P, in the form of triple superphosphate in a randomized complete block design. We evaluated the stem diameter at four, eight and twelve months after planting. At the end of the first year were evaluated crown diameter and survival. According to the classification proposed in this study the growth of A. cearensis can be considered very slow in the Oxisol, regardless of fertilization, very slow when fertilized with N in the Plinthic and slow when fertilized with P. Despite the lower growth in Oxisol, the A. cearensis showed higher nutritional requirement there. The A. cearensis seedlings showed moderate nutritional requirement for N and high for P. In Plinthic, their nutritional requirement for P was moderate and total N present in the soil was sufficient to meet growth demand in this stage. This small nutritional requirement for N may be associated with its ability to nodulation.