Growth analysis of schizolobium parahyba var amazonicum (huber ex ducke) barneby under different proportions of rock dust

Abstract

The Cerrado is a biocore biome that occupies about 25% of the Brazilian territory, located mainly in the central region. Schizolobium parahyba var. amazonicum (Huber ex Ducke) Barneby is a species of the Fabaceae family, occurring in primary and secondary terra firme forests of the Amazon region. This paper aims to evaluate the development of the species Schizolobium parahyba var. amazonicum (Huber ex Ducke) Barneby under different proportions of alternative substrate. Four treatments were used, distributed as follows: T1- Prepared Substrate (SP) 100% (Black soil, cattle manure and rice straw), control, T2- 80% SP + 20% Rock Powder (PR), T3- 65% SP + 35% PR, T4-50% SP + 50% PR. The design used was randomized blocks with 5 replications and the parameters used were: height, diameter, chlorophyll content, root dry mass (MSR), shoot dry mass (MSPA), total dry mass (MST), ratio root dry mass and shoot dry mass (MSR / MSPA), and Dickson quality index. The analysis of variance and means were compared by Tukey test at 5% probability using the Sisvar program. In all variables analyzed there was no significant difference for all treatments tested. The use of rock dust as fertilizer had no significant effects on the development of the studied species.