Allelopathic Effects of Cyperus difformis and Eleocharis atropurpurea along with Manures and Fertilizers on the Weed Growth in Transplanted Aman Rice

Abstract

At present, the rice cultivation system is in search of a biological alternative to lessen the harmful effects of chemical herbicides, as it relies heavily on them for managing weeds. This is where allelopathy plays a role, offering a potential alternative to traditional weed control methods in rice farming through the use of residues from allelopathic plants. An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh, from July 2019 to December 2019 to study the suppression of weed growth through Cyperus difformis and Eleocharis atropurpurea residues along with Manures and fertilizers in transplant aman rice. The experiment was laid out in a randomized complete block design (RCBD) with three replications. Four weed species belonging to four different families infested the experimental plots. Weed population and weed dry weight were significantly affected by treatment. Highest weed population and dry weight was found in T1 (control) for all weed variety while the minimum was found in T6 (Residues 3 t ha-1 + Vermicompost 2.5 t ha-1 + Fertilizers). The findings of this study demonstrate that combining plant residues with manures and fertilizers has the potential to suppress weed growth and improve the yield of transplanted Aman rice. Therefore, integrating plant residues with manures and fertilizers could serve as a sustainable and environmentally friendly approach for weed control and yield improvement in upcoming crop production seasons.