Effect of Seed-coating Agents on Rice Seeds with Dehiscent Glumes

种衣剂对杂交水稻裂颖种子发芽率与成秧率的影响（英文）

In order to improve the utilization efficiency of hybrid rice seeds, the effects of seed-coating agents on hybrid rice seeds with dehiscent glumes were investigated. Total six kinds of seed-coating agents were selected, i.e., 20.5% imidacloprid ·prochloraz FS, 30.5% imidacloprid oprochloraz FS, 23.0% thiamethoxam · hymexazol·prochloraz FS, Ruisheng WS, Shileshi FS and Liangdun FS, and their effects of seeds of Longliangyou Huazhan and T You 272 were investigated. The results showed that when the percentage of glume-dehiscent seeds reached 10%, 20.5% imidacloprid .prochloraz significantly improved the germination rate of Longliangyou Huazhan, which was 4.33% higher than that in the control group, and the seedling rate of Longliangyou Huazhan remained unchanged; 30.5% imidacloprid. prochloraz did not improved the germination rate of T You 272, but improved its seedling rate, which was 7.66% higher than that in the control group. When the percentage of glume-dehiscent seeds reached 20%, 20.5% imidacloprid ·prochloraz and 30.5% imidacloprid.prochloraz improved the germination rate of T You 272 by 3.50% and 4.83%, respectively, and its seedling rate did not decline. In conclusion, seed-coating agents have certain repair effect on glume-dehiscent rice seeds; 20.5% imidacloprid ·prochloraz and 30.5% imidacloprid ·prochloraz could improve the efficiency of Longliangyou Huazhan and T You 272 with small amounts of glume-dehiscent seeds.

为了提高杂交水稻种子的利用率,研究种衣剂对杂交水稻裂颖种子的影响,采用6种市售种衣剂20.5%吡·咪FS、30.5%吡·咪FS、23.0%噻·恶·咪FS、锐胜WS、适乐时FS和亮盾FS包衣含裂颖实粒的杂交水稻组合隆两优华占和T优272种子,测定种子的发芽率和成秧率。结果表明,裂颖实粒占混合种子的10%时,20.5%吡·咪能提高隆两优华占混合种子的发芽率,显著高于对照处理4.33%,而成秧率没有下降;30.5%吡·咪没有提高T优272混合种子的发芽率,但成秧率有所提高,显著高于对照处理7.66%。裂颖实粒占混合种子的20%时,20.5%吡·咪和30.5%吡·咪均提高了T优272混合种子的发芽率,显著高于对照处理3.50%和4.83%,成秧率并没有下降。试验结果说明,种衣剂可能对裂颖种子有修复作用,20.5%吡·咪和30.5%吡·咪包衣含少量裂颖实粒的隆两优华占和T优272种子后,可提高种子效价。