Coating of prilled urea with neem (Azadirachta indica) for efficient nitrogen use in lowland transplanted rice (Oryza sativa) Y.S. SHIVAY, R. PRASAD, S. SlNGH , S.N. SHARMA
DOI:
https://doi.org/10.59797/ija.v46i3.3290Keywords:
Nitrogen, Coated urea, Yield attributes, Yield, N uptake, Apparent N recovery, RiceAbstract
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), neern 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 kglha) 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 recgvery 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.References
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C. 1999. Coating of prilled urea with neem (Azrulirachta ilzdica J~rss.) oil for efficient ni- trogen use in rice. Nat~r~wisse~zscha~te~z
Santhi. S.R.. Palaniappan, Sp. and Purushottaman, D. 1986. Influence of neern leaf on nitrification in a lowland rice soil. Plalzt and Soil 93 : 133-135.
Singh. G. and Singh, O.P. 199 1. Effect of coated urea materials on rainfed lowland transplanted rice (Oryza sativa) and their residual effect on wheat. [lzdialz JOLL~IIUI
oj Agro1701lzy36 (suppl.) : 22 1-223.Devakumar, C. and Mukcrjce, S.K. 1985. Nitri-
fication retardation by neem-products. Neein
Nc~vsle~tcr2 :1 1 -14. Panigrahi R.K. and Dixit. L. 199 1. Relative ef-
ficiency of slow-release nitrogenous rerti-
lizers in rainfed rice (01~:asntiva). Inrlinil
Jou~.~zn/ 36 :401 403.
of Agro~io~ig~
Prasad, R.. Devakumar. C. and Shivay. Y.S.
Neeln Research alzd Develop~ne~lt.
pp. 97-106. Randhawa, N.S. and Parmar B.S. (Eds). Society of Pesticide Science, India.
Prasad, R. and Power, J.F. 1995. Nitrification in- hibitors for agriculture, health and the environ- rnent. Adva~zcesi~z 54: 233-281.
Agro~zo~lzy Prasad, R.. Singh, S., Saxena, V.S. and Devakurnar.
C. 1999. Coating of prilled urea with neem (Azrulirachta ilzdica J~rss.) oil for efficient ni- trogen use in rice. Nat~r~wisse~zscha~te~z
Santhi. S.R.. Palaniappan, Sp. and Purushottaman, D. 1986. Influence of neern leaf on nitrification in a lowland rice soil. Plalzt and Soil 93 : 133-135.
Singh. G. and Singh, O.P. 199 1. Effect of coated urea materials on rainfed lowland transplanted rice (Oryza sativa) and their residual effect on wheat. [lzdialz JOLL~IIUI
oj Agro1701lzy36 (suppl.) : 22 1-223.
