Effect of irrigation and methods of weed management on weed dynamics and yield of summer rice (Oryza sativa) under system of rice intensification

S. MOHAPATRA; A.K. MOHANTY; S.K. TRIPATHY; B.R. NAYAK; N. PANIGRAHY; P.K. SAMANT; S. LENKA

doi:10.59797/ija.v62i3.4300

Authors

S. MOHAPATRA
A.K. MOHANTY
S.K. TRIPATHY
B.R. NAYAK
N. PANIGRAHY
P.K. SAMANT
S. LENKA

DOI:

https://doi.org/10.59797/ija.v62i3.4300

Keywords:

Chlorimuron + metsulfuron, Pretilachlor, System of rice intensification, Water application method, Weed-control efficiency, Weed density, Weed dry weight, Yield

Abstract

A field experiment was conducted during the summer season of 2014 and 2015 to study the effect of irrigation and methods of weed management on weed dynamics, yield and nutrient uptake of rice (Oryza sativa L.) under system of rice intensification (SRI). Application of 50 mm water on the day before weeding operation was signifi- cantly superior to saturation (15 mm) on the day before weeding operation for grain yield (5.5 t/ha) owing to the lowest weed density (172.2/m2), weed dry weight (76.1 g/m2), and the highest number of panicles/plant (35.1) and filled grains/panicle (94). Pre-emergence application of pretilachlor @750 g/ha at 3 days after transplanting (DAT) followed by post-emergence application of chlorimuron ethyl + metsulfuron methyl @ 4 g/ha at 20 DAT proved to be most effective in minimizing the density of weeds (139.8/m2), their dry weight (65.5 g/m2) and enhancing weed- control efficiency (57.6%), grain yield (5.6 t/ha), N-P-K uptake of 66.1, 20.2, 23.0 kg/ha respectively by grain, net returns (52,714 /ha) and benefit: cost ratio (3.35).

References

Babar, S.R. and Velayutham, A. 2012. Weed management practices on nutrient uptake, yield attributes and yield of rice under system of rice intensification. Madras Agriculture Journal 99(13): 5154_CIT_Dass, A., Kaur, R. Choudhary, A.K., Pooniya, V., Raj, R. and Rana, K.S. 2015. System of rice (Oryza sativa) intensification for higher productivity and resource-use efficiencyA review_CIT_Indian Journal of Agronomy 60(1): 110_CIT_Dewangan, D., Singh, A.P., Nirala, H. and Verma, M. 2011. Effect of different weed management practices on weed density and weed dry matter production in system of rice intensification (SRI). Indian Journal of Weed Science 43(3 and 4): 217 221_CIT_Haden, V.R., Duxbury, J.M., DiTommaso, A. and Losey, J.E. 2007_CIT_Weed community dynamics in the system rice intensification (SRI) and the efficiency of mechanical cultivation and com- petitive rice cultivars for weed control in Indonesia. Journal of Sustainable Agriculture 30(4):5-26_CIT_Haefele, S.M., Woperies, M.C.S., Ndiaye, M.K., Barro, S.F. and Ouldisseelmou, M. 2004. Internal nutrient efficiencies, fer- tilizer recovery rates and indigenous nutrient supply of irri- gated low land rice in sahelian West Africa. Field Crops Research 80: 1932_CIT_Hameed K.A., Mosa, A.K. and Jaber, F.A. 2011. Irrigation water reduction using system of rice intensification compared with conventional cultivation methods in Iraq. Paddy and Water Environment 9: 121127_CIT_Gomez, K.A. and Gomez, A.A. 2010. Statistical Procedures for Agricultural Research. (2nd Ed.). Wiley India Pvt. Ltd., India_CIT_Shantappa, D., Reddy, Y.K., Pujari, B.T. and Kumar, M.R. 2014.320 MOHAPATRA ET AL. [Vol. 62, No. 3 Performance of SRI and NTP rice (Oryza sativa L.) cultiva- tion under different water levels. Progressive Research 8(9): 788790_CIT_Singh, V.P., Singh, G., S.R.K., Singh, S.P., Kumar, A., Dhyani, V.C., Kumar, M. and Sharma, G. 2005. Effect of herbicides alone and in combination on direct-seeded rice. Indian Journal of Weed Science 37: 197201_CIT_Sinha, S.K. and Talati, J. 2007. Productivity impacts of the system of rice intensification: A case study in West Bengal, India_CIT_Agricultural Water Management 87(1): 5560_CIT_Walia, U.S., Walia, S.S., Sindhu, A.S. and Nayyar, S. 2012_CIT_Bioefficacy of pre- and post-emergence herbicides in direct- seeded rice in Central Punjab. Indian Journal of Weed Sci- ence 44(1): 3033.