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| Seed germination and seedling growth of seed from velvetleaf treated by herbicides |
| QI Yue1,2, GUAN Xiao1, YAN Bing1,2, DU Le-shan1, FU Gang1,2, QIAO Meng-ping1,3, LI Jun-sheng1 |
1. Research Center for Biodiversity, Chinese Research Academy of Environmental Sciences, Beijing 100012, China;
2. College of Water Sciences, Beijing Normal University, Beijing 100875, China;
3. Renmin University of China, Beijing 100872, China |
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Abstract For further study the ecological risk of herbicides and the carry-over effect of herbicides on plant reproduction, the pot and germination experiment were used to investigate the effect of tribenuron-methly or atrazine treated on flowering stage of velvetleaf (Abutilon theophrasti Medicus) on the offspring germination and seedlings growth. The result shows that tribenuron-methly and atrazine both had a carry-over effect on velvetleaf reproduction. Tribenuron-methly had no significant effect on germination percentage and mean germination time (MGT) of seeds. Initial germination time was irregularly changed (advance or delay) with the increase of tribenuron-methly concentration. Radicle growth of seedlings (7days) were inhibited by the recommended field application concentration (RFAC) (22.5g ai/hm2) of tribenuron-methly, with promoted by the others doses. Seed germination percentage from parent plants treated by 1/16of RFAC (75g ai/hm2) of atrazine was significantly higher than that treated by other doses. The initial germination time were delayed significantly when parent plants were treated by RFAC (1200g ai/hm2), 1/4of RFAC (300g ai/hm2) of atrazine. MGT of seeds from parent plants treated by atrazine significantly increased, and seedlings growth was inhibited when parent plants were treated by 1/64 (18.75g ai/hm2), 1/4 of RFAC of atrazine.
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Received: 06 January 2016
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