The Effects of Boron (B) and Phosphorus (P) Applications on Some Plant Characteristics in Cowpea (Vigna unguiculata L.)

Abstract

In this study, conducted in the District of Ordu Province in 2021, the objective was to investigate the impacts of varying doses of P and B on key plant characteristics of cowpea (Vigna unguiculata L.) under typical farming conditions. The experiment followed a randomized block design with three replications. The Amazon cowpea variety was selected. Phosphorus doses ranged from 0 to 80 kg ha-1 (0, 40, 60, 80), while Boron doses (as P2O5) varied from 0 to 6000 g ha-1 (0-1500-3000-6000). The findings revealed significant variations among treatments. The flowering period ranged from 56 to 75 days, with the first pod height between 24.66 and 29.13 cm. Pod dimensions varied, with lengths spanning 14.92 to 17.88 cm and widths from 5.28 to 7.54 mm. Seed yield per plant showed a range of 26.74 to 38.99 g/plant, while harvest index ranged from 13.22 to 24.47%. Additionally, the number of nodules per plant ranged from 9.26 to 42.53. In the results of this study, there were statistically significant (P