Produção de mudas de Caesalpinia pyramidalis Tul em diferentes substratos

Abstract

The use of native species for the recovery of degraded areas has been of great relevance, however, there is a deficiency in studies towards the northeast. However, this region has a diverse native flora of high cultural and economic relevance, such as Caesalpinia pyramidalis Tul, popularly known as catingueira. It is noted for being a rustic and multifaceted culture, being used in several medicinal, logging, cultural, animal feeding, among others. The objective of this work was to evaluate the effects of chemical fertilization and of different substrate sources on the emergence and initial growth of Caesalpinia pyramidalis. For the constitution of the substrates samples of a yellow distrocoses Latossolo collected at 50 cm of depth and super thin vermiculite were used. Bovine manure, organic compound and castor bean were used as organic residues. The treatments were constituted of the factorial arrangement 1/1/1 (one part of soil, one of vermiculite and one of substrate) and 2/1/1 (two part of soil, vermiculite and substrate) between seven types of formulated substrates combined with the addition or not of chemical fertilization (NPK), totaling 14 treatments with five replicates, being arranged in a completely randomized design. Emergence and morphological patterns were evaluated. The seedlings of Caesalpinia pyramidalis submitted the substrates consisting of organic compound in the ratio 1/1/1 and 2/1/1 and the bovine manure 2/1/1 generated satisfactory results for the development of the culture. There was no interaction (p> 0.05) between the addition of NPK and the types of substrates evaluated for the studied variables. It is recommended the use of the organic compound and bovine manure of the proportions mentioned above in the initial development of Caesalpinia pyramidalis.