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Studies on Nutrient Management Options for Sustainable Organic Cotton Production and Soil Health

KrishiKosh

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Title Studies on Nutrient Management Options for Sustainable Organic Cotton Production and Soil Health
 
Creator Rudragoud F. Channagoudra
 
Contributor H.B. Babalad
 
Subject Agronomy
 
Description Field experiments were conducted in two successive seasons, namely “Studies
on the impact of organic manures, crop residues, green manures and liquid organic
manure on growth, yield and quality of organic cotton and soil health” and “Studies
on the effect of organic manures, liquid organic manures and micronutrients on
productivity, quality and profitability of organic cotton production and soil health”
during 2010-11 and 2011-12 at Main Agricultural Research Station, University of
Agricultural Sciences, Dharwad.
The pooled data of two years showed that, integrated application of compost
(50%) + VC (50%) equivalent to RDF + GLM (gliricidia) with surface application of
jeevamrutha @ 500 l ha-1 recorded significantly higher kapas yield (1640 kg ha-1),
leaf area index (0.83), total dry matter production (106.4 g), number of bolls (37.7),
mean boll weight (4.63 g), organic carbon (6.0 g kg-1) available N, P2O5, K2O (288.1,
31.2 and 335.5 kg ha-1, respectively), N2- fixers (42.86 cfuX103 / g of soil),
dehydrogenase (11.63 μg TPF /g of soil / day), natural enemies and soil arthropods
over other organic combinations and was on par with RDF + FYM, compost + VC
equivalent to RDF + green bio- mass production by in situ green manuring of lucerne
(4.89 t ha-1) with jeevamrutha and crop residue + VC equivalent to RDF + GLM with
jeevamrutha. Crop residue + VC equivalent to RDF + lucerene green manure with
jeevamrutha recorded significantly higher net returns (Rs. 59531 ha-1) and B:C ratio
(2.83) over other combinations.
In second trial, combined application of EC (1/3) + VC (1/3) + GLM (1/3)
equivalent to RDF with foliar spray of panchagavya @ 5% recorded significantly
higher kapas yield (1999 kg ha-1), leaf area index (0.82), total dry matter production
(99.2 g), number of bolls (35.9), mean boll weight (4.70 g), fibre length (28.23 mm),
maturity ratio (0.69), organic carbon (5.7 g kg-1), available N, P2O5, K2O (284.4, 29.7
and 300 kg ha-1, respectively), N2- fixers (36.48 cfuX103 / g of soil), dehydrogenase
(10.88 μg TPF /g of soil / day), net return (Rs. 80199 ha-1) and B:C ratio (3.40) over
other organic combinations. However, it was on par with EC (1/3) + VC (1/3) + GLM
(1/3) equivalent to RDF with foliar spray of borax @ 0.2% + MgSO4 1%, vermiwash
@ 20% and cow urine @ 10%, respectively.
 
Date 2016-07-25T13:41:08Z
2016-07-25T13:41:08Z
2012
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/69766
 
Format application/pdf
 
Publisher UAS Dharwad