Effect of Plant Growth Promoting Rhizobacteria and Molasses on Seed Germination and Seedling Growth of Sorghum bicolor L.Moench

Suliasih Suliasih, Sri Widawati Viewed 113 times, Downloaded 463 times

Abstract


Germination is the first step of the activity of plant growth. It is important for the next step in the field. The aim of the study was to evaluate the effect of PGPR and molasseson both germination (in vitro and soil) of Sorghum bicolor. The PGPR inoculants used were Phosphate Solubilizing Bacteria (Bacillus sp.) and Nitrogen Fixing Bacteria (Azospirillum sp, Azotobacter sp). Sorghum seed were treated with PGPR (sole and mixed inoculation) and molasses either singly or in combination. The result showed that in vitro experiment, seed inoculation significantly enhanced root and shoot length, and index vigour of sorghum. Conversely, seed germination were negatively affected by molasses application. In pot experiment, the application of both PGPR and molasses increased root and shoot length, and also root and shoot dry weight. The highest root and shoot length, root and shoot dry weight was obtained with seed treated in combination PGPR mixed inoculation and molasses.


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