Evaluation of Allelopathy of Agricultural Land Associated Trees on Weed Growth and Yield Performance of Boro Rice

We conducted an experiment at the Agronomy Field Laboratory, BAU, Mymensingh to evaluate the allelopathic effect of Mangifera indica, Artocarpus heterophyllus, Albizia lebbeck and Shorea robusta on the weed growth and yield performance of boro rice. The experiment consisted of one cultivar i.e. BRRI dhan29 and five different extract’s treatments such as no leaf extracts (T1), Mangifera indica leaf extracts(T2), Artocarpus heterophyllus leaf extracts(T3), Albizia lebbeck leaf extracts (T4) and Shorea robusta leaves extract (T5) @20:200 (w/v) ratio concentration. The experiment was laid out in a Completely Randomized Design with four replications. Weed population, weed dry weight were significantly affected by different treatments. The highest weed population and dry weight for all weed species were found in no tree leaf extracts treatments (T1) and Shorea robusta leaf extracts (T2) respectively. The lowest weed population and weed dry weight were recorded in Artocarpus heterophyllus leaf extracts (T3). The highest grain yield as well as the yield contributing characters was recorded in Albizia lebbeck leaf extracts (T4). The highest reduction of grain yield was observed in T1 (no tree leaf extracts) treatment. The longest plant height, highest number of total tiller hill-1, highest number of effective tillers hill-1, number of grains panicle-1, 1000-grain weight, grain and straw yields were observed in Albizia lebbeck leaf extracts (T4) treatment and the lowest was observed in T1. Results of this study indicates that Artocarpus heterophyllus (T3) and Albizia lebbeck (T4) leaf extracts showed potentiality in yield contributing characters of Boro rice. Therefore, Artocarpus heterophyllus and Albizia lebbeck leaf extracts might be used as an alternative way for weed management and sustainable crop production.