Weed and nitrogen management effects on weed flora and productivity of transplanted rice (Oryza sativa) in North-Eastern region of India

HITESH S; SEEMA SEPAT; SUBHASH BABU; T.K. DAS

doi:10.59797/ija.v63i4.5690

Authors

HITESH S ICAR Research Complex for NEH Region, Barapani, Meghalaya 793 103
SEEMA SEPAT ICAR Research Complex for NEH Region, Barapani, Meghalaya 793 103
SUBHASH BABU ICAR Research Complex for NEH Region, Barapani, Meghalaya 793 103
T.K. DAS ICAR Research Complex for NEH Region, Barapani, Meghalaya 793 103

DOI:

https://doi.org/10.59797/ija.v63i4.5690

Keywords:

Grassy weeds, North-Eastern Hill region, Rice, Weed dry-weight

Abstract

A field study was conducted during rainy (kharif) season of 2017 at Barapani, Meghalaya, to find out the effects of weed and nitrogen management on weed flora and yield of transplanted rice (Oryza sativa L.) in North-Eastern region of India. The experiment was taken in split-plot design with 3 replications. In the main plot, 4 weed management practices, viz. unweeded control; oxadiargyl 0.08 kg/ha followed by (fb) bispyribac-Na 0.02 kg/ha; oxadiargyl 0.08 kg/ha fb hand weeding (HW) at 40 days after transplanting (DAT), and 2 HW at 20 and 40 DAT was taken, while 4 N levels, viz. 0, 30, 60 and 90 kg N/ha were taken in sub-plots. At 60 DAT, total weed population and weed density were remained at par in HW at 20 and 40 DAT, oxadiargyl 0.08 kg/ha fb HW at 40 DAT and oxadiargyl 0.08 kg/ha fb bispyribac-Na 0.02 kg/ha. The grain yield also followed the same trend and remained at par in HW at 20 and 40 DAT, oxadiargyl 0.08 kg/ha fb HW at 40 DAT and oxadiargyl 0.08 kg/ha fb bispyribac-Na 0.02 kg/ha. However, in terms of net returns, application of oxadiargyl 0.08 kg/ha fb bispyribac-Na 0.02 kg/ha recorded the highest followed by oxadiargyl 0.08 kg/ha fb HW at 40 DAT. Application of N at higher level reduced the total weed population at 60 DAT and a reverse trend was found with weed dry weight. Application of 90 kg N/ha recorded higher grain yield, net returns and benefit: cost ratio. It may be concluded that oxadiargyl 0.08 kg/ha fb bispyribac-Na 0.02 kg/ha with 90 kg N/ha could be an alternative for HW to enhance the productivity in transplanted rice for North-Eastern region of India.

References

Bray, R. H. and Kurtz, L.T. 1945. Determination of total, organic, and available forms of phosphorus in soils. Soil Science 59(1): 39–45.

Dass, A., Shekhawat, K., Choudhary, A.K., Sepat, S., Rathore, S.S., Mahajan, G. and Chauhan, B.S. 2017. Weed management in rice using crop competition–A review. Crop Protection 95: 45–52.

Economic Survey of India, 2016. Union budget and economic survey. Ministry of Finance, Government of India, New Delhi. Available at http://indiabudget.nic.in (accessed in June 2016).

Hanway, J.J. and Heidel, H. 1952. Soil analysis methods as used in Iowa State College Soil Testing Laboratory. Bulletin 57, Iowa State College of Agriculture, USA. p. 131.

Ngachan, S.V., Pattanayak, A. and Mohanty, A.K. 2006. Status paper on rice in North East India. Rice Knowledge Management Portal (RKMP), India. pp. 1–2.

Singh, K. and Tripathi, H.P. 2008. Effect of nitrogen and weed control practices on performance of irrigated direct seeded rice (Oryza sativa). Indian Journal of Agronomy 52(3): 231–234.

Subbiah, B.V. and Asija, G.L. 1956. A rapid procedure for the determination of available nitrogen in soils. Current Science 25: 259–260.

Walia, U.S., Bhullar, M.S., Nayyar, S. and Sindhu, V. 2009. Role of seed rate and herbicide on the growth and development of direct dry-seeded rice. Indian Journal of Weed Science 41(1 and 2): 33–36.

Walkley, A.J. and Black, I.A. 1934. An examination of the Degtjareff method for determination of soil organic matter and a proposed modification of the chromic acid titration method. Journal of Soil Science 37: 29–38.

Zhang, L., Lin, S., Bouman, B.A.M., Xue, C., Wei, F., Tao, H., Yang, H., Wang, D.Z. and Dittert, K. 2009. Response of aerobic rice growth and grain yield to N fertilizer at two contrasting sites near Beijing, China. Field Crops Research 114: 45–53.