水稻立枯病是旱育秧最主要的病害，在全国各地普遍发生，危害十分严重，成为稻农反映最强烈的问题。关丽君等详细研究了我国北方稻区旱秧立枯病与土壤ｐＨ值、病原菌、秧苗素质等的关系，明确了培育壮秧和防治病害的关键技术是土壤调酸。成文志等研究认为，立枯病发生时，温度 Blight of rice is the most important disease of dry-growing seedling, which is common in all parts of the country. The damage is very serious and has become the most serious problem of rice-agriculture. Guan Lijun et al. Studied in detail the relationship between the dead-leaf blight of drought-growing seedlings and the soil pH value, pathogen and seedling quality in the northern rice area of ​​China. The key technology of cultivating strong seedling and preventing and controlling diseases was soil acid-adjusting. Cheng Wenzhi and other studies believe that when the blight occurs, the temperature