ABSTRACT:
The efficiency of phosphorus uptake by
plants in an Ultisol soil is very low because most of soil phosphorus is
precipitated by Al and Fe. Oil palm empty fruit bunches can be used as
basic materials of biochar and compost, and as sources of isolates of
phosphate solubilizing fungi. This study was aimed to elucidate the
effect of application of phosphate solubilizing fungi with biochar and
compost generated from oil palm empty fruit bunches on growth and yield
of maize an Ultisol of Central Kalimantan. This study consisted of two
experiments. The first experiment was inoculation of four isolates of
phosphate solubilizing fungi isolated from of oil palm empty fruit
bunches, i.e. Acremonium (TB1), Aspergillus (TM7), Hymenella (TM1) and
Neosartorya (TM8) to 'biocom' media (mixture of biochar and compost
generated from oil palm empty fruit bunches) to obtain phosphate
solubilizing fungi that can adapt to the media. In the second
experiment, the best results in the first experiment were applied to an
Ultisol soil planted with maize. The results showed that isolates that
were best adapted to biocom media were Aspergillus-TB7 with 60:40
proportion (60% biochar + 40% compost) and Neosartorya-TM8 with 70:30
proportions (60% biochar + 40% compost). The application of the first
experiment results to the second experiment showed that the application
of biocom plus Neosartorya-TM8 (BTM) on an Ultisol soil significantly
improved growth and yield of maize, as well as phosphorus uptake and
efficiency of phosphorus uptake by maize.
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