摘 要：
研究了 6个水稻恶苗病菌菌株孢子液于水稻扬花期接种的稻种 ,翌年种植后 ,水稻恶苗病徒长型病株的症状变化时间、比例、类型及各类型病株对稻谷产量构成因子的影响 ,并比较了同一水稻品种不同菌株间及不同品种同一菌株间的差异。结果表明 ,水稻苗期显症病株除枯死外有 3种转化类型 ,即显症 隐症、显症 隐症 显症、持续显症 ;苗期隐症病株除一直表现为隐症外还有两种转化类型 ,即隐症 显症、隐症 显症 隐症。各类型病苗的最后稻谷产量均较健株的低。
译 名：
SYMPTOM CHANGE OF RICE BAKANAE DISEASE PLANTS AND ITS INFLUENCE ON YIELD COMPONENTS
作 者：
Zhu Guimei Pan Yilou Yang Jinghui Song Limei (Zhenjiang Institute of Agricultural Sciences, Jurong, Jiangsu 212400)
关键词：
Rice bakanae disease; Change of symptoms; Yield constituting factors
摘 要：
The seeds of 4 rice varieties were inoculated with 6 Gibberella fujikuroi strain microconidia when they were in the flowering stage and planted next year. The time of symptom changes,the proportion and the types of bakanae disease infected leggy rice seedlings as well as the effects of symptom change types on rice yield constituting factors were studied. The differences of the same rice variety with varied strains and of different rice varieties with the same strain were also compared. The results indicated that there were three types in symptom change of rice bakanae disease for displayed symptomdiseased plants in seedling stage except death:(1)displayed symptom diseased plant hidden symptom diseased plant,(2)displayed symptom diseased plant―hidden symptom diseased plant displayed symptom diseased plant,(3)keeping displayed symptom diseased plant; for hidden symptom diseased plants of seedling stage there were tow types of hidden symptom change except maintaining hidden symptom: hidden symptom―displayed symptom and hidden symptom―displayed symptom―hidden symptom. The results also indicated that the yield of hidden symptom diseased plants, like that of displayed symptom diseased plants, was lower than that of healthy plants.
