Changes of Weedy Rice Occurrence in Repeated Wet Direct Seeding and Alternate Transplanting/Wet Direct Seeding of Rice
2013
Son, J.Y., RDA, Suwon, Republic of Korea | Lee, C.K., RDA, Suwon, Republic of Korea | Kim, J.H., RDA, Suwon, Republic of Korea | Yang, U.H., RDA, Suwon, Republic of Korea | Choi, K.J., RDA, Suwon, Republic of Korea | Park, H.K., RDA, Suwon, Republic of Korea | Park, T.S., RDA, Suwon, Republic of Korea | Kim, J.G., Jeollabuk0do Agricultural Research and Extension, Iksan, Republic of Korea | Yoon, Y.H., RDA, Suwon, Republic of Korea
Weedy rice is one of the major problems in direct-seeded rice field, resulting in poor rice quality and low grain yield. This study was carried out to evaluate the conversion effect to machine transplanting after wetdirect-seeding for 3 years on weedy rice occurrence, in comparison of repeated wet-direct-seeding. Occurrence of weedy rice in the continuous wet-hill-seeded and broadcasted field for 3 years increased 4 folds, when compared with that in machine transplanted rice paddy. In the first year of wet-direct-seeded field converted from machine transplanting, weedy rice occurrence did not increase, demonstrating lesser weedy rice in wet-hill-seeded than broadcasted field. These results indicate that alternate cultivation of wet-hill-seeding and machine transplanting is more effective to prevent weedy rice occurrence than the repeated wet-direct-seeding method for 3 years.
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