Nitrogen management in baby corn (Zea mays)

By Anita Bindhani, K. Barik, L. M. Garnayak, P. Mahapatra. Indian Journal of Agronomy, 2001

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A field experiment was conducted during the rainy season of 2002 and 2003 at Bhubaneshwar, Orissa to study the effect of nitrogen levels (40, 80 and 120 kg Nlha) and timing of nitrogen application [M basal + '/2 at 25 days af- ter sowing (DAS), lI3 + Y3 at 25 DAS M basal + '/4 at 25 days + '/4 at pre-tasselling (40 DAS) and ' 1, basal + ' 1, basal at 25 DAS + 113 at pre-tasselling] along with no-nitrogen (control) on productivity and nitrogen-use efficiency of baby corn (Zea mays L.). Growth, yield attributes, baby corn yield, nitrogen content and uptake, protein content and yield, net return and benefit : cost ratio increased significantly up to 120 kg Nlha. The differences between 80 and 40 kg Nlha were also significant. Nitrogen application in 3 equal splits as ' 1, basal + 11, at 25 DAS + 'I3 at pre- tasselling (40 DAS) resulted in significantly higher growth, yield attributes, marketable baby corn yield, green fod- der yield with lowest discarded baby corn, maximizing net return, benefit : cost ratio, nitrogen content, uptake, pro- tein content and yield than other schedules of N application. The apparent N recovery was the highest at 120 kg NI ha, whereas physiological and agronomic use efficiency progressively decreased with increasing nitrogen levels. Nitrogen applied in 3 equal splits resulted in the highest N recovery and agronomic use efficiency, while physi- ological efficiency of N was maximum when N was applied in 2 splits.

Subfields: Agronomy and Crop Science

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