Document Type : Original Article

Authors

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

Abstract

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh from June to November 2018 to investigate the effect of application of lentil and grass pea crop residues on weed management and crop performance of T. aman rice. The experiment consisted of three variety i.e. BR11, BRRI dhan49 and Binadhan-7 and five treatments of crop residues such as no crop residues, lentil crop residue @ 2 t ha-1, grass pea crop residue @ 2 t ha-1, combination of lentil and grass pea @ 1 t ha-1 of each and hand weeding. The experiment was laid out in a randomized complete block design with three replications. The maximum weed growth was noticed with the no crop residues treatment, the minimum was found in hand weeding. The highest percent weed inhibition of 83.95%, 80.87%, 82.21% and 81.49% was obtained from Echinochloa crusgalli, Scirpus juncoides, Monochoria vaginalis and Marsilea quadrifolia L. respectively caused by hand weeding. The grain yield as well as the yield contributing characters produced by BRRI dhan49 was the highest among the studied varieties. The highest production of grain yield was obtained by hand weeding, however, the second highest was obtained from a combination of lentil and grass pea @ 1 t ha-1 of each was applied and the lowest production of grain yield was obtained in T1 (no crop residues). BRRI dhan49 under combination of lentil and grass pea @ 1 t ha-1 of each treatment produced the highest grain yield. 

Keywords

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