Analisa kandungan IAA pada pupuk organik hayati (POH)-STARTMIK LIPI dan isolat tunggal sebagai starter serta isolat baru kandidat untuk peningkatan kualitas

In order to improve the quality of liquid organic biofertilizer (LOB), the effect of storage on the containing of Indol Acetic Acid (IAA) growth factor and the supporting tryptophan as inducer of IAA production were conducted. The results showed that 5 months storage of LOB had higher concentration of IAA than 1 year storage. Regarding single isolate of inoculant, addition of tryptophan in the culture media increased the production of IAA. The new isolate of Klebsiella pneumonia was able to produce the highest IAA compare to all isolate of the collected beneficial microorganisms.