Response of Onion Yield under Field Conditions to Humic Substances Derived from Different Sources
Response of Onion Yield under Field Conditions to Humic Substances Derived from Different Sources
Ahmad Khan1, Raza Ullah Khan1*, Muhammad Zameer Khan1, Fayyaz Hussain1,Muhammad Ehsan Akhtar2, Jalal-Ud-Din3
ABSTRACT
A field experiment was conducted at NARC, Islamabad to evaluate the effect of humic substances (HSs) derived from coal, sunflower, and maize waste materials on onion yield. Four HSs rates; 0, 20, 30 and 40 kg/ha were applied to onion (variety Red Swat) transplanted earlier to field (plot size=1.2×0.8 m2). Results showed that maximum bulb yield of 25.1 and 24.5 t/ha were obtained with application of plant derived HSs; SFDHSs and MDHSs respectively, while 24.7 t/ha bulb were obtained with CDHA applied at the rate of 20 kg/ha. Almost same trend was observed with respect to the number of bulbs per plot. The highest number of 28.3 bulbs/plot were obtained in CDHA given at 20 kg/ha, followed by 25.5 and 24.6 bulbs/plot in SFDHSs and MDHSs both applied at 30 kg/respectively. On overall, results from this study implies it is optimum and economical to apply CDHA at 20 kg/ha whereas SFDHSs and MDHSs at 30-40 kg/ha for study area and vegetable.
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June 2017
Vol. 30, Iss. 2, Pages 122-208
