Effect of A Biological Complex Seed-coating Agent on Rice Seedling Growth
To improve the germination rate and growth of rice,home-made 2％ tebuconazole biological complex seed-coating agent (BCSA) was used with different doses for coating rice seeds,4 seed-coating agents,39％ matalaxyl-M azoxystrobin,600 g/L imidacloprid,10.6％ tebuconazole thiram and 35％ thiamethoxam were used with the ratios of the agent to seed weight,1:250,1:250,1:60 and 1:500,respectively,as chemical controls.The results showed that the optimal doses for BCSA were related to germination temperature,namely the higher temperature was,the lower BCSA dose and vice versa between 20-30℃.At 20℃,the germination rate of rice seeds coated with BCSA and the 4 agents were 5.77％,0.38％,1.53％,-0.39％ and 3.84％ higher than that of the naked seed control (NSC).The root of seedlings from BSCA-coated seeds were 91.85％,154.37％,186.85％,118.09％ and 67.19％ longer,the sprout of those were 52.43％,93.81％,103.50％,50.74％ and 38.44％ longer than those of the four chemicals and NSC,respectively.The best ratio of BCSA to seeds was 1:50 when rice was seeded in mud.The emergency rate,fresh weights of aerial and underground parts of the seedlings were 7.58％,18.96％ and 15.07％ higher than those of NSC at 35 day after seeding.
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维普
