Vol. 12, Issue 9 (2023)

Author(s):
R Kirankumar, Ravikumar A, Basavaraj K, Bhat SN and Vijayachandra Reddy

Abstract:
Vermicompost which provide macro and micro nutrients to the plants also reduces environmental pollution by providing valuable substitutes for chemical fertilizers. In the present investigation deals with vermicomposting of seven different organic substrates and evaluation of nutrients in those vermicomposts following two bio-chemical analysis. The seven substrates that include (T₁ parthenium, T₂ vegetable waste, T₃ greenmanure, T₄ banana trash, T₅ waterhayacynth, T₆ paddy straw and T₇ farmwaste and vermicomposting speciese Earthworm Eudrilus euginae. The experimental results clearly shows that remarkable changes in nutrients composition of different organic substrates noticed at two time bio-chemical analysis done at 30 days before when the substrate under gone partial decomposition and second analysis at 58- 88^th days of vermicompost produced by the earthworm Eudrilus euginae. Among the seven organic substrates T₂ vegetable waste recorded as many as ten micronutrients with two heavy metals (Barium and lithium) rest of the treatments (T₁: parthenium, T₃: green manure, T₄:bananatrash, T₅:waterhayacynth, T₆: paddystraw and T₇: farmwaste) lacking with 3-5 micronutrients at first bio-chemical analysis. Similarly at second bio-chemical analysis results of the same seven substrates shows further changes in composition of substrates with pH, EC, C/N ratio, major and micronutrients composition viz., N, P, K, Zn and Mg composition. Among the seven substrates T₁ parthenium, T₂ vegetablewaste, T₄ bananatrash and T₅ waterhayacynth recorded highest per cent of major nutrients N, P and K and Quite fluctuating propotions of micronutrients zinc and iron recorded by all the susbstrates used in the experiment.