POTENSI EKSTRAK AIR DARI RATUN TANAMAN SORGUM YANG DITANAM DI LAHAN INCEPTISOLS SEBAGAI BIOHERBISIDA.

Allelopathy is a process that involves secondary metabolites produced by plants. Sorghum plants can produce allelopathic that can be used as bioherbicides. The source of extracts from different varieties has different bioherbicide potential. This study aims to test the extracts of ratoon organs of sorghum plants grown on inceptisol land against germination. The research was conducted on inceptisol land in Kandang Mas-Bengkulu City, and in the laboratory, January-June 2023. The study used a single factor completely randomized design. The treatments tested were seven-week-old sorghum water extracts derived from different materials and varieties, (control, Numbu variety leaves, Numbu variety stems, Numbu variety roots, Super 1 variety leaves, Super 1 variety stems, Super 1 variety roots, Suri 4 variety leaves, Suri 4 variety stems, and Suri 4 variety roots). The variables observed in this study were normal sprouts percentage, abnormal sprouts percentage, hypocotyl length, radicle length, fresh weight (hypocotyl, radicle, cotyledons, and sprouts), dry weight (hypocotyl, radicle, cotyledons, and sprouts). Observed data were analyzed for variance and treatments with significant effects were further tested using the LSD test 5% level. The results showed that ratoon extract was able to inhibit sorghum seed germination. The aqueous extract derived from the ratoon leaves of the Super 1 variety produced the highest abnormal sprouts, the lowest normal sprouts, the lowest plumula length, and the radicle length. The leaf organs of Super 1 variety ratoon in particular and the organs of Super 1 variety ratoon, in general, are the best allelopathic materials as bioherbicides. [ABSTRACT FROM AUTHOR]