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STUDIES ON DIFFERENT LEVELS OF IRRIGATION AND FERTIGATION IN ONION (Allium cepa L.)

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Title STUDIES ON DIFFERENT LEVELS OF IRRIGATION AND FERTIGATION IN ONION (Allium cepa L.)
 
Creator USHA RANI, T
 
Contributor CHANDRA SEKHAR REDDY, K
 
Subject STUDIES, DIFFERENT, LEVELS, IRRIGATION, FERTIGATION, ONION
 
Description A field experiment was conducted on sandy clay loam soil during rabi season of
2007-2008 at Water Technology Centre, College Farm, College of Agriculture,
Rajendranagar, Hyderabad to study the effect of different levels of irrigation and
fertigation on growth, yield and yield attributes, quality, water use efficiency, nutrient
uptake, fertilizer use efficiency and economics of onion. The experiment was conducted
in strip-plot design with three replications using cv. Light Red. Three irrigation levels as
main treatments viz., drip irrigation at 0.8 Epan, 1.0 Epan and 1.2 Epan and three
fertigation levels as sub treatments viz., 100, 80 and 60 per cent recommended NPK ha-1
were tried in three replications.
Irrigation at 1.2 Epan recorded significantly higher plant height, maximum number
of leaves plant-1, leaf area, dry matter accumulation in leaf and bulb, CGR, LAI, bulb
yield and yield components, uptake of N, P and K in leaf and bulb and net returns. The
TSS of bulb was highest at 1.0 Epan followed by 1.2 Epan and water use efficiency was
highest at 0.6 Epan followed by 0.8 Epan and 1.2 Epan.
Fertigation with 100 per cent recommended dose of fertilizers significantly
increased all growth characters, yield and yield attributes, TSS of bulb and net returns.
The fertilizer use efficiency decreased with increase in fertigation level.
Interaction effects were found significant for plant height, leaf area, dry matter
production of leaves and bulbs, CGR, HI and nutrient uptake, while non significant for
yield and yield attributes. Among the various treatment combinations, irrigation at 1.2
Epan with 100 per cent recommended dose of fertilizers was found significantly superior
over other treatment combinations in most of the characters studied.
The plant height, number of leaves plant-1, leaf area plant-1, total dry matter, CGR,
bulb length, diameter and weight, total nutrient uptake were positively and significantly
correlated with bulb yield.
The study revealed that irrigation at 1.2 Epan with fertigation of 100 per cent
recommended dose of NPK ha-1 found optimum for obtaining maximum bulb yield for
rabi onion cv. Light Red in sandy loam soils.
 
Date 2016-08-05T13:41:09Z
2016-08-05T13:41:09Z
2008
 
Type Thesis
 
Identifier http://krishikosh.egranth.ac.in/handle/1/71038
 
Language en
 
Relation D8287;
 
Format application/pdf
 
Publisher ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD