STUDIES ON ALLELOPATHY OF RICE (ORYZA SATIVA) FOR BARNYARDGRASS CONTROL

摘要

Allelopathic function of rice (Oryza sativa L.) for barnyardgrass (Echinochloa crus-galli (L.) Beauv. var. mitis (Pursh) Peterm) control was observed in the effect of 84 rice varieties on the growth of barnyardgrass in greenhouse during 1999～2000. Rice varieties of I-26, TJI43, RY503 and LY2186 provided excellent control of plant dry weight of barnyardgrass with 96%, 95%, 93%and 91% respectively compared with susceptible species of XSH63. The control of barnyardgrass plant density was given significantly in 42%, 35%, 30% and 30% from varieties of I-26, TJI43, RY503 and LY 2186. In these experiments we obtained good materials for developing the biotechnology research of rice allelopathy on the weed.