Study on Chemical and Biochemical Characteristics of EM II. Study on Gibberellic Acid Like substance in EM

Abstract

Gibberellic acid (GA) like substance from EM or super EM which was incubated for various periods at ambient temperature was analysed. We found the low content of GA like substance during initial time until 14 days after incubation and maximum content at 42 days after incubation about 44.959 mg/g dry weight. Em was mixed in the gradient of pesticidal formula and compost amount 8 formulas. The EM could promote GA content of all formulas. The compost (bokachi) which was mixed with rice hull, rice bran, cattle dung (ratio 1:1:1) and 10 litres of EM/20 kg compost showed the highest GA like substance which contained 11.334 mg/g dry weight at initial time and 28.979 mg/g dry weight at final period (30 days after mixing). The pesticidal formula (sutoju) which was mixed which EM and the solution of 1 litre of fresh milk and 80 ml of yakult in ratio 4:1 and incubated for 24 h contained high GA like substance in the range or 7.740 mg/g dry weight.