STUDIES ON DIFFERENT LEVELS OF IRRIGATION AND FERTIGATION IN ONION (Allium cepa L.)
KrishiKosh
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Title |
STUDIES ON DIFFERENT LEVELS OF IRRIGATION AND FERTIGATION IN ONION (Allium cepa L.)
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Creator |
USHA RANI, T
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Contributor |
CHANDRA SEKHAR REDDY, K
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Subject |
STUDIES, DIFFERENT, LEVELS, IRRIGATION, FERTIGATION, ONION
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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. |
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Date |
2016-08-05T13:41:09Z
2016-08-05T13:41:09Z 2008 |
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Type |
Thesis
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Identifier |
http://krishikosh.egranth.ac.in/handle/1/71038
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Language |
en
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Relation |
D8287;
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Format |
application/pdf
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Publisher |
ACHARYA N.G. RANGA AGRICULTURAL UNIVERSITY, RAJENDRANAGAR, HYDERABAD
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