Effect of zinc and boron application on growth and yield parameters of multiplier onion (Allium cepa L. var aggregatum Don.) var. CO (On)5

2015

E11099

Field experiment was carried out in the College orchard, Horticultural College and Research Institute, Tamil Nadu Agricultural University, Coimbatore, Tamil Nadu during 2013 - 2014 to study the effect of zinc and boron application on seeding transplanting multiplier onion CO(On)5 at different levels of both foliar and basal application. The treatment consist of soil application of zinc sulphate (5 kg ha-1 and 10 kg ha-1), Borax (5 kg ha-1 and 10 kg ha-1), foliar application of zinc sulphate (0.5% foliar) and Borax (0.25% foliar), zinc sulphate (5 kg soil + 0.5% foliar), zinc sulphate (10 kg ha-1 soil + 0.5% foliar), borax (5 kg ha-1 soil + 0.25% foliar), borax (10 ha-1 kg soil + 0.25% foliar) and control without micronutrient, replicated thrice in a randomized block design. The foliar spray was given 30 and 45 days after transplanting for both zinc sulphate and borax. N, P, K, and S were applied at 90-60-60-20 kg ha-1 respectively as basal dose. Results were found to be significant in most of the yield contributing parameters of multiplier onion. The plant height (50.30 cm), number of leaves per plant (51.3), leaf girth (8.1 mm), fresh leaf weight (22.7 g), fresh bulb weight (85.4 g), total dry matter production (5.31 t ha-1), bulb yield per plot (10.1 kg) and bulb yield per hectare (16.9 t ha-1) were highest in zinc sulphate 0.5% foliar spray. While 10 kg ha-1 borax soil application showed highest polar (26.0 mm) and equatorial diameter (27.2 mm) and borax (5 kg ha-1 soil + 0.25% foliar), highest number of bulblets per clump (8.8) in borax (10 kg ha-1 soil).

2(1):757-765, INTERNATIONAL JOURNAL OF RESEARCH

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