Allelopathic Effect of the Residues of Rumex Maritimus L. on the Yield Performance of Boro Rice

An experiment was conducted at the Agronomy Field Laboratory, BAU, Mymensingh, during the period from December 2018 to May 2019 to evaluate the effect of the residues of R. maritimus on the yield performance of boro rice. The experiment consisted of two cultivars i.e.; BRRI dhan58 and BRRI dhan74 and four rates of R. maritimus residues treatment such as 0, 1.0, 2.0, 3.0 t ha-1 and a farmers practice. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Yield and yield contributing characters like number of total tillers hill-1, number of effective tillers hill-1, number of non-effective tillers hill-1, 1000-grain weight, grain yield, straw yield, biological yield and harvest index were significantly affected by the interaction between variety and residues. BRRI dhan74 under R4 treatment condition produced the highest grain (5.42 t ha-1) and straw yield (6.71 t ha-1) followed by the same variety. The lowest grain yield (5.15 t ha-1) and straw yield (6.51 t ha-1) resulted from BRRI dhan58 variety under R1 treatment. The highest grain (5.42 t ha-1) and straw (6.71 t ha-1) yields were observed in R. maritimus residues @ 3.0 t ha-1 treatment. Results of this study indicate that R. maritimus residues showed potentiality to inhibit weed growth and it has a significant effect on the yield of boro rice. Therefore, R. Maritimus residues might be used as an alternative way for weed management in effective and sustainable crop production.