不同生态环境下2009年江西省主栽早稻品种稻瘟病的发生

Occurrence of Rice Blast in Main Early Rice Varieties Planted in Different Ecological Regions of Jiangxi Province in 2009

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。

The resistance to rice blast of 10 main early rice varieties planted in Jiangxi Province on a large scale and 4~7 varieties planted in a few counties on a given scale was evaluated through three batches of sowing in 5 counties with different ecological environments.There existed a great difference in the occurrence of rice blast among different counties.The available data were obtained from 3 locations out of the 5.The results revealed that Jingyou463,Zhuliangyou02,and Zhuliangyou09 were moderate-resistant to leaf blast,with