CD Skripsi
Uji Aktivitas Beberapa Bakteri Sebagai Pelarut Fosfat Dan Kemampuannya Dalam Meningkatkan P Tersedia Di Tanah Masam
ABSTRACT
Acid soils generally have high hydrogen ions and cause the soil to react acidically.
One of the impacts that arise as a result of acid pH is the low P available to plants.
Increasing the efficiency of available phosphate can be done by utilizing
phosphate solubilizing microorganisms. Phosphate solubilizing bacteria also play
a role in dissolving insoluble phosphate into soluble, both from the soil and from
fertilizers, so that it can be absorbed by plants. This study aims to test the
potential of several phosphate-solubilizing bacteria in dissolving phosphate on
Pikovskaya media and test the activity of phosphate-solubilizing bacteria in
increasing available P in acidic soil. This study used a two-factor factorial
completely randomized design. The first factor is the type of bacteria, namely
Bacillus cereus JP6, Bacillus cereus JP7, Proteus mirabilis TKKS3, Proteus
mirabilis TKKS7, Providencia vermicola SA1, Bacillus cereus SA6 and
consortium. The second factor was acid soil type, Inseptisol, Ultisol and Wet
Mineral. The two factors were combined, 21 combinations were obtained and
repeated 2 times so that there were 42 experimental units. The parameters
observed were qualitative phosphate dissolution index analysis, acid soil pH value
analysis, available P analysis, and respiration rate analysis. The results were
analyzed using variance analysis and DNMRT further test at the 5% level. The
results showed that the highest phosphate solubilizing bacterial activity was JP6
bacteria and the single application of phosphate solubilizing bacteria was able to
produce soil pH value, P availability and respiration rate that were relatively the
same as the results given by the combination of bacterial isolates, namely the
consortium.
Keywords: Consortium, Pikovskaya, Combination Selulolitic, Respiration Rate.
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