水稻旱育秧技术,我国从七十年代初开始引入,伹由于我国北方地区的气侯条件,不同地区的上壤类型等条件的差异,出现一系列的问题。据有关北方地区资料报道,该项技术在北方一般年份立枯病死苗面积为20％,低温多雨年份立枯病死苗达30％,部分地区更为严重。我盟开始引进该项技术以来,严重立枯死苗的现象也屡见不鲜。为 Rice drought nursery technology, China began in the early 1970s, 伹 due to the climate conditions in northern China, the different types of soil in different regions and other conditions, there are a series of problems. According to the data from the northern region, the dead blight area of ​​the technology in the general north of the country is 20% in the northern part of the country. In the cold and rainy years, dead blight of up to 30% of the dead blight occurred in some areas and even worse in some areas. Since the beginning of the introduction of the technology by our league, the phenomenon of grave death and seedling has also been not uncommon. for