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Document Type : Original Article


1 Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.

2 Agro Innovation Laboratory, Department of Agronomy, Bangladesh Agricultural University, Mymensingh-2202, Bangladesh.



Growing two or more cultivars of same crop species in mixture reduces intra-specific competition for natural resources and increases competitive ability of crops against weed growth and thus enhances crop yield. The objective of this study was to evaluate the potentiality of growing rice cultivars in mixtures in temporal dimension for minimizing weed pressure and increasing rice yield and to determine the best time of introduction of one cultivar in relation to another cultivar. The experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during aman season (July-December) 2017. Two transplanted aman rice cultivars having different plant height and growth duration viz. Binadhan-13 (tall, late- maturing and fine grained aromatic rice cultivar) and BRRI dhan49 (semi-dwarf, mid-maturing and coarse grained rice cultivar) were used in this study. The experiment comprised time of introduction of BRRI dhan49 namely 7 days before Binadhan-13, 7 days after Binadhan-13, same day as Binadhan-13, Binadhan-13 as sole crop, BRRI dhan49 as sole crop and three different weeding regime namely weedy, recommended weeding and weed free. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Both the cultivars showed better growth and higher yield when grown in mixture rather than sole culture. Transplanting of one cultivar before or after another cultivar produced more yield and suppressed weed better than transplanting of two cultivars on the same day. Thus only spatial arrangement produced no advantages over sole culture. Among the weeding regimes, weedy treatment performed the worst, while recommended weeding and weed free treatment performed similarly. Therefore, for better weed suppression and higher production, BRRI dhan49 may be transplanted 7 days before or after Binadhan-13 in 1:1 ratio following recommended weeding.


Al-Amin M, Anwar M.P, Rahman M.R, Islam M.R, Islam A.K.M.M. 2019. Growing tall and dwarf rice cultivars in mixture for better weed management and higher yield. J Bangladesh Agric Univ. 17(2): 133-141.
Anwar M.P, Juraimi A.S, Man A, Puteh A, Selamat A, Begum M. 2010. Weed suppressive ability of rice (Oryza sativa L.) germplasm under aerobic soil conditions. Aus J Crop Sci. 4(9): 706-717.
Arefin M.A, Rahman M.R, Rahman A.N.M.A, Islam A.K.M.M, Anwar M.P. 2018. Weed competitiveness of winter rice (Oryza sativa) under modified aerobic system. Arch Agric Environ Sci. 3(1): 1-14.
Bahani A.F, Pirdashti H, Niknejhad Y. 2014. Effect of rice (Oryza sativa L.) cultivar mixture on paddy yield and yield components under different nitrogen levels. Int J Farming Allied Sci. 3(3): 317-319.
Binang W.B, Ekeleme F, Nita J.D. 2011. Management of weeds of rainfed lowland rice using cultivar mixture strategies. Asian J Agric Res. 5(6): 306-311.
Bowden R, Shroyer J, Roozeboom K, Claassen M, Evans P, Gordon B, Heer B, Janssen K, Long J, Martin J, Schlegel A, Sears R, Witt M. 2001: Performance of wheat variety blends in Kansas. Res J Agric Biol Sci. 6(6): 1055-1059.
BRRI. 2016. Bangladesh Rice Knowledge Bank. Bangladesh Rice Research Institute. Available online at
Callaway R.M. 1995. Positive interactions among plants. Botanical Rev. 61: 306-349.
Castilla N.P, Vera Cruz C.M, Mew T.W, Zhu Y. 2003. Using rice cultivar mixtures: a sustainable approach for managing diseases and increasing yield. Int Rice Res Inst. pp. 7
Rodríguez E.E. 2006. Effect of cultivar mixture on the competitive ability of barley against weeds. MS Thesis, Department of Crop Production Ecology, Sveriges Lantbruks University, Uppasala, Sweden.
Fischer A.J, Chatel M, Ramierz H, Lozano J, Guimaraes E. 1995. Components of early competition between upland rice (Oryza sativa) and Brachiaria brizantha (Hochst.ex A. Rich). Int J Pest Manag. 41: 100-103.
Fukai S, Trenbath B.R. 1993. Processes determining intercrop productivity and yields of component crops. Field Crops Res. 34: 247-271.
Garcia-Barrios L. 2003. Plant-plant interactions in tropical agriculture. In: Vandermeer J.H, editor. Tropical agroecosystems. Boca Raton, Florida: CRC Press. pp: 11-58.
Jareen B, Anwar M.P, Yeasmin S, Islam A.K.M.M, Rashid M.R, Sultana M.T, Juraimi A.S. 2019. Evaluation of the cultivar mixture strategy as a sustainable tool for managing weeds and enhancing rice yield. Big Data Agric. 1(2):1-9.
Juskiw P.E, Helm J.H, Salmon D.F. 2000. Competitive ability in mixtures of small grain cereals. Crop Sci. 40: 159-164.
Juraimi A.S, Uddin M.K, Anwar M.P, Mohamed M.T.M, Ismail M.R, Man A. 2013. Sustainable weed management in direct seeded rice culture: A review. Aust J Crop Sci. 7(7): 989-1002.
Khan M.Z.K, Hasan A.K, Anwar M.P, Islam M.M. 2017. Weeding regime and plant spacing influence on weed growth and performance of transplant aman rice variety Binadhan-7. Fund Appl Agric. 2(3): 331-339.
Mundt C.C. 2002. Use of multiline cultivars and cultivar mixtures for disease management. Annual Rev Phytopathol. 40: 381-410.
Rodriguez E.E. 2006. Effect of cultivar mixture on the competitive ability of barley against weed, MS Thesis, Swedish University of Agricultural Sciences.
Shabi T.H, Islam A.K.M.M, Hasan A.K, Juraimi A.S, Anwar M.P. 2018. Differential weed suppression ability in selected wheat varieties in Bangladesh. Acta Scient Malaysia. 2(2): 1-7.
Sultana M.T, Anwar M.P, Hossain M.D, Jareen B, Islam R, Islam A.K.M.M. 2019. Weed competitiveness and productivity of interplanted wheat cultivars under varying water management. J Res Weed Sci. 2: 292-309.