Efektivitas Plant Growth Promotion Rhizobacteria (PGPR) dan Pupuk NPK terhadap Pertumbuhan dan Pembungaan Tanaman Aster Ericoides (Symphyotrichum ericoides)

Abstract

The aim was to study growth and flowering response of Aster ericoides to PGPR application and NPK fertilizers Experiment method used a split plot design with main plot was PGPR concentration namely no PGPR, 10 ml L^-1 PGPR, and 20 ml L^-1 PGPR and the sub-plots was the NPK fertilizerdose namely without NPK, 50% NPK 75% NPK and 100% NPK. Plant growth parameters included plant height and number of branches. Yield parameters included number of flowers, root dry weight, and total plant dry weight. Data were analyzed by F test at the 5% of significance level. PGPR with a concentration of 20 ml L^-1 without NPK gave maximum growth effect on number of branches, number of flowers, dry weight of roots, and total dry weight compared to aster fertilized with 100% NPK. Dry weight increased by 54% and number of flowers up to 2905 buds stalk-1 while plants without PGPR treatment with 100% NPK did not get flowering with 100% NPK did not flower until 12 weeks after planting. Application of PGPR with 20 ml L^-1 NPK 50% showed an increase in the number of flowers reached up 22.57% compared to PGPR treatment of 20 ml L^-1 without NPK.

Keywords: sustainable, pikok, ornamental plant