Global Advanced Research Journal of Agricultural Science (GARJAS) ISSN: 2315-5094

February 2013 Vol. 2(2): pp. 047-058

Copyright © 2015 Global Advanced Research Journals

 

Full Length Research Paper

Manurial value of different vermicomposts and conventional composts

 

Ch.S. Rama Lakshmi, P.C.Rao, T.Sreelatha, M.Madahvi, G.Padmaja, P.V.Rao and A. Sireesha

 

Regional Agricultural Research Station, Anakapalle – 531001, Visakhapatnam district, Andhra Pradesh, India.

*Corresponding Author’s Email: sitaramalakshmi20@yahoo.com

Accepted 11 February, 2013

 

Abstract

The aim of this study was to evaluate the manurial value and maturity indices in different composting methods with different organic residues. Studies were conducted on normal composting with chemical additives and vermicomposting with Eisenia foetida in different organic residues i.e sugarcane trash, weeds, vegetable market waste and paddy straw mixed with cattle dung. Vermicomposting resulted in significant reduction in C:N ratio and increase in total N,P, K, Zn, Fe, Mn and Cu content after 65 days of composting over normal composting uninoculated with earthworms after 110 days. The enzyme activities i.e. phosphatase, dehydrogenase and cellulase were decreased with increasing the composting period in all the organic residues. Microbial activity, as measured by dehydrogenase assay, increased initially and declined on further incubation. However higher dehydrogenase activity was recorded in vermicomposting over normal composting of different organic residues and with in the organic residues, vegetable market waste recorded higher enzyme activities except cellulase, it was higher in paddy straw compost. There was more total N in the compost prepared by earthworm inoculation. Total P, K and Cu contents did not differ in compost prepared with earthworm inoculation from the uninoculated treatments.

Keywords: Vermicomposting; organic residues; manorial value.

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