种子处理对水稻稻瘟病防治及增产效果的影响研究

Effect of Seed Treatments on Rice Blast's Control Efficiency and Production Increase

本研究以宁夏原种场自育水稻新品种宁原花4号为对象,选用4种不同药剂进行种子处理,明确水稻种子药剂包衣处理对水稻稻瘟病的控制效果及增产效果。结果表明:混配的13%精甲霜灵咯菌腈+70%噻虫嗪处理的水稻出苗率最高,为93.29%,其次为24.1%异噻菌胺·肟菌酯悬浮种衣剂处理,出苗率为92.88%;24.1%异噻菌胺·肟菌酯悬浮种衣剂处理对水稻稻瘟病的防效最高;混配13%精甲霜灵咯菌腈+70%噻虫嗪种子处理的水稻产量最高,达10275 kg/hm^(2),较对照增产13.82%,其次为24.1%异噻菌胺·肟菌酯悬浮种衣剂处理,产量为9928.5 kg/hm2,较对照增产9.98%。综合以上结果,混配13%精甲霜灵咯菌腈+70%噻虫嗪种子处理和24.1%异噻菌胺·肟菌酯悬浮种衣剂处理可以提高水稻保苗率,对水稻穗瘟病也有明显的控制效果,增产效果显著。

The self-cultivated new rice species,Ningyuanhua No.4 in Ningxia stock seed farm was taken as the research object.Four different agents were used to treat the seeds to study the effect of pharmaceutical coating of rice seed on the prevention of rice blast and the yield increase.The results showed that the emergence rate was the highest of 93.29%under the treatment of mixture of 13%Fludioxonil+Metalaxyl-M and 70%thiamethoxam.Under the treatment of 24.1%heterotrophictrifloxystrobin flowable concentrate for seed coating,the emergence rate was 92.88%,which showed the optimal control efficiency of rice blasts.The corresponding yield was 9928.5 kg/hm2,9.98%higher than the CK level.Under the treatment of 13%Fludioxonil+Metalaxyl-M and 70%thiamethoxam,the yield was the highest,up to 10275 kg/hm2,13.82%higher than the CK level.Therefore,the aforementioned two treatment methods could increase survival rate of rice seed,but also could control rice blasts and enhance the yields.