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Asian Journal of Plant Sciences
Year: 2003  |  Volume: 2  |  Issue: 13  |  Page No.: 993 - 998

Effect of Varieties of Rice and Weeding on Weed Growth and Yield of Transplant Aman Rice

Md. Moynul Hoque, Md. Mosharraf Hossain, Md. Rezaul Hoque Khan, K.M. Khalequzzaman and S.M.R. Karim    

Abstract: An experiment was conducted at the Agronomy Field Laboratory, BAU, Mymensingh during June to December 2000 to assess the effect of varieties of transplanted aman rice and weeding regimes on weed growth and yield of transplant aman rice. Five varieties and five weeding were used in the experiment. The results revealed that BRRI dhan 34 was the most competitive variety, which provided with the least accumulation of weed dry matter per unit area. The ranking was BRRI dhan 34 ≈ Binashail > Nizershail > BRRI dhan 39 ≈ BRRI dhan 33 The ranking of the varieties in respect of grain yield was BRRI dhan 39 ≈ BRRI dhan 33 > Binashail > BRRI dhan 34 > Nizershail. The effect of weeding regimes produced significant differences on the weed growth and grain yield of transplant aman rice. The reduction of weed dry matter was similar in both two weeding and three weeding regimes. The highest grain yield was noted under three weeding conditions (3.95 t ha-1) which was at par with weed free (4.01 t ha-1), but dissimilar to two weeding regimes (3.71 t ha-1).

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