Evaluation of various sources of organic manures on nitrogen use efficiency in rice-rice cropping system

Investigations were carried out to study the effect of organic farming with various sources of organic manures and their combinations on nitrogen use efficiency parameters of ADT 36 rice (Oryza sativa L.). The experiments were laid out in randomized block design (RBD) with fourteen treatments, compr...

Full description

Saved in:
Bibliographic Details
Published in:Scientific research and essays 2013-11, Vol.8 (42), p.2087-2099
Main Authors: S, Krishnakumar, R, Muthukrishnan, V, Rajendran, R K, Kaleeswari
Format: Article
Language:English
Subjects:
Azolla
Oryza sativa
Citations: Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Investigations were carried out to study the effect of organic farming with various sources of organic manures and their combinations on nitrogen use efficiency parameters of ADT 36 rice (Oryza sativa L.). The experiments were laid out in randomized block design (RBD) with fourteen treatments, comprising twelve treatment combinations of organic manures, one treatment with recommended dose of chemical fertilizer and the other was absolute control which were replicated three times. The recommended dose of NPK fertilizer was 90: 40: 40 kg ha super(-1) for Kharif and Rabi rice. The recommended dose of 90 kg N ha super(-1) was substituted through organics viz., farm yard manure (FYM), Sesbaniarostrata, composted coirpith alone and in combination with neem cake and Azolla. The nitrogen use efficiency parameters such as partial factor productivity (PFP sub(N)), agronomic efficiency (AE sub(N)), recovery efficiency of applied nitrogen (RE sub(N)), physiological efficiency of applied nitrogen (PE sub(N))- and internal efficiency of applied nitrogen(IE sub(N)) values were high in the treatment receiving FYM + neem cake applied at 90 kg N ha super(-1 )level.
ISSN:1992-2248
1992-2248
DOI:10.5897/SRE2013.5634