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Effect of IN-SITU Green Manuring of Legumes, NP Levels and Organic Manures on Growth and Yield of Safflower Under Under Rainfed Condition.

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Title Effect of IN-SITU Green Manuring of Legumes, NP Levels and Organic Manures on Growth and Yield of Safflower Under Under Rainfed Condition.
 
Creator Yogesh T. C.
 
Contributor S. M. Hiemath
 
Subject Agronomy
 
Description Two field experiments were conducted to study 1) Effect of in-situ leguminous green
manures and N and P application on growth and yield of rainfed safflower and 2) Effect of
leguminous green manures on growth and yield of organic safflower crop at Agricultural
Research Station, Annigeri, University of Agricultural Sciences, Dharwad during 2011-12
and 2012-13. Both the experiments were laid out in split plot design which comprised of four
green manures assigned to main plots (sunnhemp, greengram, cowpea and fallow) and four N:
P levels assigned to sub-plots in first experiment (0:0, 20:20, 30:30 and F4: 40:40 N: P2O5 kg
ha-1) and five organic manures assigned to sub-plots in second experiment (No fertilizer, 100%
N through FYM, 100% N through vermicompost, 50% N through FYM + 50% N through
vermicompost (VC) and RDF (40:40:12 kg N, P2O5, K2O ha-1)).
Cowpea and sunnhemp green manures performed significantly superior in terms of
phytomass, biomass and nutrients (NPK) accumulation than greengram. In the first
experiment, seed yield of safflower (10.67 q ha-1) with application of 40:40 N: P2O5 kg per ha
(RDF) without green manuring was comparable to in-situ incorporation of cowpea and
sunnhemp green manure applied with 50 per cent recommended dose of NP (20:20 N: P2O5
kg ha-1) to safflower (11.54 and 10.44 q ha-1, respectively) indicating saving of N and P to the
tune of 50 per cent. Further, seed yield of safflower could be increased to 15.71 q ha-1 and
14.22 q ha-1 by cowpea and sunnhemp green manuring, respectively coupled with RDF.
These treatment combinations also recorded significantly higher net returns (` 30,227 and
26,263 ha-1, respectively) and B:C ratio (3.85 and 3.45, respectively) over other
combinations.
In second trial, significantly higher safflower seed yield (10.08 q ha-1) was recorded in
RDF without green manuring compared to fallow with no fertilizer/manure. Further the seed
yield of safflower increased with incorporation of cowpea and sunnhemp with the application
of RDF to safflower (13.54 and 12.91 q ha-1, respectively) than other combinations except
cowpea and sunnhemp coupled with 50 % N through FYM + 50 % N through VC (12.41 and
12.31 q ha-1, respectively). Maximum net returns per ha was recorded with cowpea coupled
with RDF (` 21,851) or cowpea applied with 50 % N through FYM + 50 % N through VC
(`19,934) or sunnhemp green manure applied with RDF (` 19,658). This clearly indicates the
possibility of growing safflower organically without affecting its productivity and
profitability.
 
Date 2016-11-23T13:45:34Z
2016-11-23T13:45:34Z
2013
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/87225
 
Format application/pdf
 
Publisher UAS, Dharwad