RESPON PERTUMBUHAN TANAMAN TOMAT (Solanum lycopersicum) TERHADAP APLIKASI PGPR AKAR BAMBU (Bambusa vulgaris)

Abstract

Plant Growth Promoting Rhizobacteria is a group of beneficial bacteria that aggressively colonize rhizosphere. Bakteria in PGPR can functionn as biostimulants, which are able to trigger plant growt by producing growth phytohormones. The bacteria suspected to exist in the roots of the yellow bamboo is Paenibacillus polymyxa. This bacterium is antagonistic to the growth of pathogens and also has the property of inducing plats resistance so that i tis widely used as a biological agent. This study aims to examine the effect of giving PGPR from the roots of yellow bamboo on the growth of tomato plants and determine the effective concentration of PGPR to increase the yield of tomato plants. The research design used a completely randomized design with 4 treatments concentration of PGPR, namely 0 ml/L, 5 ml/L, 10 ml/L, and 15 ml/L. Data analysis using the Anova test with a level of 5% showed that there was no significant difference in increasing plant height, number of petioles, number of fruit planted, fruit weight, and root length. The best treatment for plant height, number of petioles, number of fruit planted and fruit weight was obtained by PGPR treatment using 10 ml/L whereas the best PGPR concentration of root length was 15 ml/L.