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Indian Journal of Agronomy
Year : 2012, Volume : 57, Issue : 2
First page : ( 138) Last page : ( 142)
Print ISSN : 0537-197X. Online ISSN : 0974-4460.

Influence of spacing and weed management on rice (Oryza sativa) varieties under system of rice intensification

Singh Nain, Technical Officer, Kumar Dinesh*Senior Scientist, Thenua O.V.S., Professor, Tyagi V.K., Professor

Indian Agricultural Research Institute, New Delhi 110 012

Department of Agronomy, A.S. College of Agriculture, Lakhaoti, Bulandshahar, UP

*Corresponding author Email: dineshctt@yahoo.com

Based on Ph.D. thesis of the first author submitted to CCS University, Meerut, Uttar Pradesh

Online published on 6 July, 2012.

Received:  August,  2011; Accepted:  February,  2012.


Field experiments were conducted in a sandy clay loam soil during kharif 2005 and 2006 at New Delhi to evaluate the performance of aromatic rice (Oryza sativa L.) varieties under varying weed management options and planting geometry in system of rice intensification (SRI). Rice ‘Pusa Sugandh 5’ proved better as compared to the other two varieties, i.e. ‘Pusa Basmati 1’ and ‘Pusa Sugandh 3’, especially in terms of growth, yield attributes and grain yield. On an average, ‘Pusa Sugandh 5’ produced 18.9% and 22.5% more grain yield over ‘Pusa Basmati 1’ and ‘Pusa Sugandh 3’, respectively. ‘Pusa Sugandh 5’ also gave the highest economic returns. Spacing 25 × 25 cm resulted in higher grain and straw yields and better economic returns than 30 × 30 cm. Averaged over two years, the increase in grain yield with 25 × 25 cm over 30 × 30 cm was to the tune of 19.5%. Maintaining fields weed free gave higher plant growth, yield attributes, grain yield and economics as compared to either anilophos @ 0.4 kg/ha or the weedy check. Anilophos @ 0.4 kg/ha was far advantageous than the weedy check.



Spacing, System of rice intensification (SRI), Varieties, Weed management.


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