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在全省5个生态环境不同的试验点,采用分3批播种(间隔期5 d),评估全省10个主栽早稻品种及各地4~7个自选品种对水稻稻瘟病的抗性。结果表明,不同生态环境下稻瘟病的发生差异很大。根据3个试验点获得的有效数据统计,对叶瘟表现中抗的品种有金优463、株两优02和株两优09,其平均病叶率分别为0.27%、0.34%和0.30%;对穗瘟表现为抗病的品种有株两优09和淦鑫203,其平均病穗率分别为0.41%和0.89%,表现为中抗的品种有陆两优996、株两优02、T优898、金优463,平均病穗率分别为1.76%、1.76%、2.29%和3.37%。在不同的生态环境下,采用分批播种法能有效地甄别水稻品种的避病性,为翌年抗瘟品种的选用及合理布局提供重要的科学依据。
Five different ecological sites in the province were sown in three batches (interval 5 days) to evaluate the resistance of 10 cultivated early rice varieties and 4 ~ 7 self-selected varieties from all over the province to rice blast. The results showed that the occurrence of rice blast differed greatly in different ecological environments. According to the valid data obtained from the three experimental sites, Jinyou 463, Zhuliangyou 02 and Zhu Lianglian 09 were the resistant cultivars to 0.27%, 0.34% and 0.30% of the average leaf area respectively. The varieties resistant to panicle blast showed strain Zhu Liang-liang 09 and Gan Xin 203 with the average disease-onset rates of 0.41% and 0.89%, respectively. The resistant varieties showed Lu Liangyou 996, Zhu Liangyou 02, T You 898, Jinyou 463, the average disease panicle rate was 1.76%, 1.76%, 2.29% and 3.37% respectively. Under different ecological environment, the batch sowing method can effectively screen the anti-disease of rice varieties and provide an important scientific basis for the selection and reasonable layout of the anti-blast varieties in the following year.