Application of organic amendments and PGPR on Salibu Rice yield for drought adaptation

Drought is one of the climate change phenomena that has a profound impact on agricultural crops. Various adaptation strategies are used to deal with the impacts of climate change, one of which is the ratoon system of rice cultivation. This study aims to examine the effects of providing a combination of organic amendment and the application of PGPR on soil characteristics, growth, and yield of salibu ratoon system in the rainfed dry land. The research was conducted in Wonosari Village, Gondangrejo, Karanganyar, Central Java. This research used a complete randomized block design with three replications consisting of 2 factors. The first factor is the organic amendment, which is without the addition of organic matter (C1), compost (C2), and rice husk charcoal (C3). The second factor is the PGPR treatment, which is non-inoculated PGPR (P1) and inoculated PGPR (P2). Data analysis used ANOVA level of 5% followed by Duncan’s test. The results showed that the addition of organic matter and the inoculation of PGPR affected the variable root length, yield, and biomass. The addition of organic matter and PGPR can increase crop yields and plant resistance to drought stress by maintaining soil moisture and root elongation mechanisms. Based on the research results, the addition of rice husk charcoal and PGPR inoculation is the best combination for ratoon rice cultivation in the rainfed dry land.