National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
Onion has very shallow root system that is frequently irrigated and fertilized with high fertilizer dose rates to maximize yield. Converting from furrow-fertigated to microsprinkler fertigated onion production may reduce fertilizer needs. The influence of fertigation sources and their levels, applied through microsprinkler irrigation on winter onion (Allium cepa L.) was evaluated for the years 2009-2011 under semi-arid region of India. The experiment was laid out in factorial randomized block design with nine treatments replicated thrice under microsprinkler system comprising three fertigation sources in main plots with three fertigation levels in sub plots. Fertigation by water soluble fertilizers sources improved plant height, neck thickness, polar and equatorial diameter, dry matter, bulb weight and green leaves weight. However, the differences in fertigation source urea+ urea phosphate + muriate of potash and urea+18:18:18 through microsprinkler was mostly non-significant. In fertigation levels, 100 % and 80 % recommended dose gave significantly higher values of growth and yield components than 60 % level. The marketable bulb yield decreased with decrease in level of fertigation from 100 to 60% but not decreased significantly showed potential saving of 40% fertilizer cost by use of fertigation. The bulb storage losses in microsprinkler fertigation did not differed; but was higher under when conventional fertilizer source was used. The bulb storage losses were reduced with fertigation 60 to 100%. Higher gross income, total net income, and the best benefit: cost ratio occurred with 60 and 100% microsprinkler fertigation. The treatment combination with application of 60% recommended dose of nutrients with urea+ urea phosphate + muriate of potash or urea+18:18:18 through microsprinkler in 10 weekly splits was optimum for growth, yield, storage and profit for winter onion cultivation.
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