Biomass production and partitioning and structural parameters of trunk and leaf in Butterfly Pea fertilized with phosphorus

Abstract

The experiment was conducted in a greenhouse of DTCS-UNEB, to evaluate the phosphorus fertilization (0; 25; 50; 75 and 100kg/ha of P2O5) in production and partition of biomass of part aerial and root, beyond the structural parameters of the trunk and leaf of Butterfly Pea (Clitoria ternatea L.). The experimental design was completely randomized, with five doses phosphorus and four repetitions. After 20 days of sowing, the plantule were transplanted, and five days later fertilized with the treatments, at the beginning of the experiment until 45 days, when the plant were harvested and evaluated. The phosphorus increased the production of biomass of part aerial in the maximum dose (Ymáx) of 100kg/ha in the trunk at 100kg/ha, in leaf at 98.65kg/ha and in root at 52.10kg/ha of P2O5 with a production of 17.59, 3.86, 11.28 and 1.86g/pot, respectively. For the structural parameters of the trunk, only the trunk diameter and flower button number per plant was increased with phosphorus fertilization, resulting in increased production in 68.21 and 100kg/ha of P2O5, equivalent to the 4.53mm and 7.51 flower button per plant, respectively, and to the structural characteristics of the leaves, there was an increase only in the number of expanded leaf in the secondary branches up to 68.21kg/ha P2O5 with 3.54 expanded leaves/secondary branch. Within the context of present research, to the largest accumulation of biomass of forage from the part aerial of Butterfly Pea, used in animal feed, the best response was in a 100kg/ha of P2O5.