近年来,随着山区水稻耕作技术的改革,生态环境发生了很大的变化,稻瘟病已成为生产上急需解决的问题。为了探明发病规律,指导农业生产,我们对品种、抗源、施肥、气候与稻瘟的发生关系进行调查,获得如下结果。一、水稻品种的抗性问题,直接与稻瘟病发病相关。我们在省农科院的支持下,一九七七年从全国各地引进195个抗稻瘟病品种,进行抗性鉴定,发现高抗穗瘟的只有22个品种,与平原区对比,发病程度普遍提高。这说明,在山区种植高抗品种更加必要。调查表明,在重病区基本一致的条件下,不同品种抗病性的差异甚大。如在杂优中,以威 In recent years, with the reform of rice farming techniques in mountainous areas, great changes have taken place in the ecological environment. Blast has become an urgent problem to be solved in production. In order to find out the regularity of incidence and guide agricultural production, we investigated the occurrence of breed, resistance source, fertilization, climate and rice blast, and got the following results. First, the resistance of rice varieties directly related to the pathogenesis of rice blast. With the support of the Provincial Academy of Agricultural Sciences, we introduced 195 anti-rice blast varieties from all over the country in 1977 for resistance identification and found that there were only 22 varieties highly resistant to panicle blast. Compared with the plain areas, the incidence was generally high improve. This shows that it is even more necessary to grow high resistant varieties in the mountains. Survey shows that in the basic conditions consistent with the disease, different varieties of disease resistance vary widely. As in the gifted, with Granville