Interference of allelopathic rice Huakangcao 78 on weeds under different ecological conditions
Wu, J.; Li, Y.; Chen, Z.; Wang, Y.
Ying Yong Sheng Tai Xue Bao 17(9): 1645-1648
2006
ISSN/ISBN: 1001-9332 PMID: 17147174 Document Number: 596369
A pot culture experiment was conducted to examine the interference effectiveness of allelopathic rice Huakangcao 78 on weeds Echiaochloa crusgalli L., Cypents difformis L., and Eclipta prostrata L. as affected by rice leaf age during transplanting, plant density, and soil surface water depth and its retaining days. The results showed that Huakangcao 78 could significantly reduce the dry weight of weeds compared with non-alielopathic rice Lemont. The control effectiveness of Huakangcao 78 on E. crusgalli L. was better when the weed was at 0 similar to 1.5 leaf age than at 1.5 similar to 2.4 leaf age, and that on C. difformis L. was better when the weed was at 0 similar to 0.3 leaf age than at 0.8 similar to 2.0 leaf age. The interactive effectiveness between rice leaf age during transplanting and plant density on weed control was better than that between the leaf age and soil surface water depth and its retaining days. To increase the rice leaf age during transplanting and plant density could significantly promote the control effectiveness of Huakangcao 78 on weeds.