The growth and the production of potato plant supplemented by plant growth promoting rhizobacteria (PGPR)

Abstract

Lack of nutrients is the major cause of potato production to decrease and potato plant not to grow well. The objective of the study was to analyze the effect of Plant Growth Promoting Rhizobacteria (PGPR) on the growth and the production of potato. The research was conducted in Kledung Village, Temanggung Regency (1,136 meter above the sea level), in 04 March-04 June 2018. Randomized Block Design (RBD) with five treatments was applied with five treatments each of which was placed in a different plot and each plot was filled with 40 plant treatments. On the first plot, no treatment was given (P1); the second plot was given chemical fertilizer (P2), the third plot was supplemented with PGPR one dose (P3), the fourth plot was PGPR two dose (P4), and the last was the fifth plot treated with GA hormone (P5). The results showed that there was no significant difference in plant height. The highest potato production was in the group treated with PGPR 1 time was 277.1 g and the lowest was in the P2 group, which was 101.4 gr. PGPR directly increases the availability of nutrients for plants, and increases fertility. So, it, can be concluded that the administration of PGPR one dose is the best dose and increases potato production.