Allelopathic Potential of Amrul Shak (Oxalis europea) Residues on the Yield Performance of T. Aman Rice

The experiment was conducted at the Agronomy Field Laboratory of Bangladesh Agricultural University, Bangladesh during aman season (June-November) of 2019 to investigate the allelopathic potential of amrul shak residues on crop performance of T. aman rice. The experiment consisted of three cultivars i.e. Binadhan-7, BR11 and BRRI dhan49 and five different amrul shak residues such as no crop residues, 0.5 t ha-1, 1.0 t ha-1, 1.5 t ha-1, 1.5 t ha-1 + Farmers’ practice (one hand weeding). The experiment was laid out in a randomized complete block design with three replications. The grain yield as well as the yield contributing characters produced by BRRI dhan49 was the highest among the studied varieties. The highest reduction of grain yield was obtained in T1 (no crop residues) treatment and the lowest was obtained in T5 [1.5 t ha-1 + Farmers’ practice (one hand weeding)]. The highest number of effective tillers hill-1, number of grains panicle-1, 1000-grain weight, grain and straw yields were observed in T5 [1.5 t ha-1 + Farmers’ practice (one hand weeding)] treatment. BRRI dhan49 under T5 treatment condition produced the highest grain and straw yield. Results of this study indicate that amrul shak residues showed potentiality to suppress weed growth. Therefore, amrul shak residues could be a potential source of efficient weed management tool for production of T. aman rice.