Seleksi Isolat Bakteri Pelarut Fosfat (BPF) untuk Mengembangkan Inokulum Efektif
Abstrak: The phosphate
solubilizing bacteria (PSB) can release insoluble phosphate in soil by
anorganik-P dissolution, organic-P mineralization, and blocking of soil
adsorption site. The selection of
effective PSB, therefore, is urgently
required to study the effectiveness of PSB.
The research was arranged to determine: 1) P-solubi-lization or
P-mineralization, 2) physiology, and 3)
PSB inoculant improvement. The research
was arranged in complete random design, with PSB isolate as treatment. The variables
were: soluble-P, mineralize-P, adsorption-P, pH, PSB population,
phosphatase and phythase activity. The
result showed that PSB isolate 1 = Pseudomonas trivialis, 5 =
Pseudomonas putida, and 9 = Pseudomonas fluorescens, were the best in P
solubilization or P mineralization.
Solubilization efficiency of isolate were 1 = 291%, 5 = 280%, and 9 =
347%. Five days incubation (the end of
log phase or early of stationary phase) was the best time to culture harvest
for PSB inoculant formulate. Within
twelve months age of culture, population stability of PSB inoculant decreased
between 81 and 88%, and P solubilizing
stability PSB inoculant decrease between 65 and 81%. Decreasing of P solubility
to P source types of PSB inoculant was AlP > FeP > PR > CaP.
Penulis: Tamad, Bostang
Radjagukguk, Eko Hanudin, Jaka Widada
Kode Jurnal: jpbiologidd110273