Initial growth of Brazilian Firetree (Schizolobium parahyba (Vell.) S.F.Blake) fertilized with phosphorus in Red-Yellow Latosol

Abstract

Due to the scarcity of information on the use of fertilizers on the Brazilian Firetree (locally known as guapuruvu), this study aimed to evaluate the initial stages of guapuruvu (Schizolobium parahyba (Vell.) S.F.Blake.) plant growth using different doses of phosphorus (P). The experiment was conducted within a greenhouse environment in dystrophic Red-Yellow Latosol soil samples from the Brazilian Cerrado as the substrate in plastic containers with a capacity of 10 dm 3. The experimental design was completely randomized, with six treatments and four replicates each, totaling 24 experimental units. The treatments consisted of six different treatments of P: 0; 50; 100; 150; 200 and 250 mg dm-3 , using triple superphosphate as the P-source. At 150 days, the plant height, root crown diameter, number of leaves, dry matter (leaves, stems and roots) and P content in leaves, stems, roots and soil were evaluated. In addition, the Dickson Quality Index was estimated. The results showed that plants treated with doses of 100 to 250 mg dm-3 of P had higher growth rates among the analyzed variables. Guapuruvu revealed a requirement for phosphorus in the early stages of development at the studied edaphoclimatic condition, demonstrating the necessity for the application of phosphorus doses above 100 mg dm-3 via fertilizers in soils with low P availability.

Growth and nutritional efficiency of acacia seedlings in response to phosphate fertilization

“…In turn, plants grown at the maximum P dose (200 mg dm -3 ) showed a 24% reduction in relation to the maximum SDM production (Figure 3A). These results corroborate Araújo et al (2018), who reported that high P doses may reduce SDM production, and therefore it is essential to ensure the adequate availability of this nutrient.…”

“…In guapuruvu plants (Schizolobium parahyba (Vell.) S.F.Blake), Araújo et al (2018) also observed that leaf P concentrations 6/8 were positively influenced by increasing P doses, showing increasing linear behavior as a function of applied doses.…”