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Indian Journal of Agronomy
Year : 2001, Volume : 46, Issue : 3
First page : ( 453) Last page : ( 457)
Print ISSN : 0537-197X. Online ISSN : 0974-4460.

Coating of prilled urea with neem (Azadirachta indica) for efficient nitrogen use in lowland transplanted rice (Oryza sativa)

Shivay Y.S., Prasad R., Singh S., Sharma S.N.

Division of Agronomy, Indian Agricultural Research Institute, New Delhi, 110012

Received:  August,  2000.

Abstract

A field experiment was conducted during 1995–96 at New Delhi, to study the efficiency of modified forms of urea materials, viz. prilled urea (PU), neem cake-coated urea (NCU), 0.5% of 10% neem oil emulsion-coated urea and 0.5% of 20% neem oil emulsion-coated urea at varying N rates (0, 60 and 120 kg/ha) on the productivity of lowland transplanted rice [Oryza sativa L.). Each incremental N level recorded significantly higher growth parameters, yield attributes, grain and straw yields and also N uptake over its preceding level. However, apparent N recovery decreased with increasing N levels. Neem cake-coated urea and neem oil emulsion-coated urea irrespective of the concentration improved rice growth, yield attributes and resulted in more grain and straw yields, N uptake and also higher apparent N recovery than did commercial prilled urea.

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Keywords

Nitrogen, Coated urea, Yield attributes, Yield, N uptake, Apparent N recovery, Rice.

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