Assessment of Allelopathic Effect of Albizia Lebbeck Leaf Residues on the Yield Performance of Rice

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from August 2022 to June 2023 to study the effects of the residues of Albizia lebbeck on the yield performance of boro rice. The field experiment consisted of two rice varieties viz., BRRI dhan28 and BRRI dhan29, and five residual treatments of A. lebbeck leaves such as 0, 1.0, 2.0, 0.3 and 4.0 t ha-1. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Variety had significant effect on most of the yield and yield contributing characters except number of total tillers hill-1, number of effective tillers hill-1, number of non-effective tillers hill-1 and harvest index. On the other hand, A. lebbeck residues had also significant effect on yield and yield contributing characters of rice yield except number of non-effective tillers hill-1, panicle length, grains panicle-1, number of sterile spikelets, and 1000-gain weight. The highest number of total tillers hill-1, highest number of effective tillers hill-1, higher 1000-grain weight, grain yield, straw yield and biological yield was obtained from BRRIdhan29 and residues applied @ 3.0 t ha-1. The lowest grain yield and others yield contributing characters were found in T1 (control) treatment due to lower number of effective tillers hill-1 and higher number of sterile spikelet panicle-1. From the above results it was found that the variety BRRI dhan29 and residues @ 3.0 t ha-1 produced superior effect. Therefore, Albizia lebbeck residues could be a potential source of biological weed management and yield enhancement tool for sustainable crop production.