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Indian Journal of Agronomy
Year : 2015, Volume : 60, Issue : 3
First page : ( 341) Last page : ( 346)
Print ISSN : 0537-197X. Online ISSN : 0974-4460.

Effect of crop-establishment methods and integrated nitrogen management on productivity of hybrid rice (Oryza sativa)-wheat (Triticum aestivum) cropping system

Jat A.L.1,*, Srivastava V.K.2, Singh Rajesh Kumar3

Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, 221 005

1Assistant Professor, Main Castor & Mustard Research Station, SDAU, S.K. Nagar, Gujarat

2Professor, Department of Agronomy, Institute of Agricultural Sciences, BHU, Varanasi, Uttar Pradesh, 221 005

3Assistant Professor, Department of Agronomy, Institute of Agricultural Sciences, BHU, Varanasi, Uttar Pradesh, 221 005

*Corresponding author Email: aanandiagro508@gmail.com

Online published on 6 January, 2016.

Abstract

A field experiment was conducted during the 2 rainy (kharif) and winter (rabi) seasons (2012–14) on sandyclay-loam soil at Varanasi, to study the effect of crop-establishment methods and integrated nitrogen management on productivity of hybrid rice (Oryza sativa L.)-wheat (Triticum aestivum L. emend. Fiori & Paol.) cropping system. The experiment was laid out in a split-plot design, comprising crop-establishment methods (normal transplanting and system of rice intensification) and 2 hybrids (‘PHB 71’ and ‘Arize 6444’) in combination as main plot and 6 integrated nitrogen-management practices [100% recommended dose of fertilizer (RDF), 125% recommended dose of nitrogen (RDN), 50% RDN + 50% N through farmyard manure (FYM), 50% RDN + 50% N through FYM + Azospirillum, 100% N through FYM and No fertilizer)] as subplot treatments, replicated thrice. System of rice intensification (SRI) improved the growth attributes, viz. plant height, number of tillers, dry-matter accumulation, and increased the grain yield by 14.7% over normal transplanting (5.69 t/ha) and recorded significantly higher net monetary returns and output: input ratio over normal transplanting. Rice hybrid, ‘Arize 6444’ showed significantly higher growth attributes, grain yield, economic return/day and net return with output: input ratio. Integrated N management with 50% RDN + 50% N through FYM + Azospirillum resulted in high growth, yield, crop productivity, return/day and net returns. However output: input ratio were recorded higher with 125% RDN followed by 100% RDN. Residual effect of preceding experimental variables particularly normal transplanting, hybrid ‘PHB 71’ and application of 50% RDN + 50% N through FYM + Azospirillum recorded the highest number of effective tillers, grains/ear 1, 000-seed weight and grain and straw yield of succeeding wheat.

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Keywords

Crop establishment, Nitrogen management, Rice hybrids, Residual effect, SRI.

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