Growth Response of Cowpea (Vigna unguiculata L.) Regarding the Provision of PGPR Bamboo Roots

Abstract

This study aims to determine the effect of PGPR (Plant Growth-Promoting Rhizobacteria) Bamboo Root on the growth and production of cowpea (Vigna unguiculata L.). This research was conducted at Jl. Harmonika Baru, Padang Bulan Selayang II, Kec. Medan Selayang, Medan City, North Sumatra, at an altitude of ±25 meters above sea level, with coordinates 3º33'17.532 “N; 98º38'44.94 ”E in October to December 2024. The research was conducted using a non-factorial randomized block design (RAK) with six PGPR concentration treatments,, namely P0 (control), P1 (10 ml/L water), P2 (20 ml/L water), P3 (30 ml/L water), P4 (40 ml/L water), and P5 (50 ml/L water). Parameters observed included plant height, number of leaves, germination percentage, stem diameter, Germination percentage reached 100% in this treatment. This research shows the potential of PGPR as an environmentally friendly and efficient biofertilizer in increasing plant productivity.