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Effects of Ageratina adenophora- invaded soil and its extract on upland rice Oryza sativa seed germination and seedling growth.

YAN Qi;LIU Wan-xue;LI Hui-na;WAN Fang-hao   

  1. State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100094, China
  • Received:2008-09-16 Revised:1900-01-01 Online:2009-05-10 Published:2009-05-10

Abstract: A laboratory test was conducted to study the effects of Ageratina adenophora- invaded soil and its methanol extract on the seed germination and seedling growth of upland rice Oryza sativa. The results showed that both the invaded soil and its methanol extract had different degrees of inhibitory effects on the seed germination and seedling growth of upland rice. The heavier the A. adenophora invaded, stronger the inhibitory effects of invaded soil and its extract were. It was speculated that some allelopatic chemicals released by A. adenophora could accumulate in soil, and had negative effects on the growth of native plants.

Key words: Phyllotreta striolata, Environmental factors, Dispersion, Marking recapture method