Formulation of biofertilizer using locally isolated Methylorubrum thiocyanatum UMK-PM2 and Methylorubrum salsuginis UMK-PM3 and their effect on the paddy growth

The observation of biofertilizer by using plant growth-promoting bacteria (PGPB) have great potential to provide better growth of plant and sustainable solutions to current agricultural challenges. The pink-pigmented facultative methylotrophs (PPFM) is one such organism that extremely important in biofertilizer due to it can improve crop growth and quality by reducing the negative impacts of drought. The microorganisms used in this research project was Methylorubrum sp as plant growth promoting bacteria (PGPB) which increasing soil fertility and nutrient uptake such as nitrogen and phosphorus in plants. They increase the soil productivity through fixing atmospheric nitrogen, solubilizing soil phosphorus, and promoting plant development without impact the soil and environment. The study was carried out by formulate the biofertilizer with locally isolated Methylorubrum sp in pot study one day before sowing to ensure that the microorganisms were well adapt to their optimal conditions for paddy plant growth. The microbial inoculants employed in this study were Methylorubrum thiocyanatum UMK-PM2 and M. salsuginis UMK-PM3 that been evaluate for their ability in promoting paddy plant growth performance by pot study. The results were successfully obtained showed the plant growth performance had increased after M. thiocyanatum UMK-PM2 and M. salsuginis UMK-PM3 treatment. According to the result obtained from this research, it can conclude that the formulation medium of soil are better than soil with cocopeat and it can also indicate that M. salsuginis UMK-PM3 (p<0.05) is effective PGPB strain than M. thiocyanatum UMK-PM2 to promote the plant growth due to its significant level was more confident.