早稻旱育秧是稻作技术上的一项重大改革,在各地稻区均表现出了显著的增产效果,较好的秧苗素质是早稻旱育秧获得高产的基础。然而,早稻旱育秧死苗现象,长期以来在一些地方时有发生,成了该项技术推广普及的障碍因子。生产中引起死苗的情况有以下几种,必须针对具体情况找出原因,并对症加以防治。营养土准备不当。有的地方使用干陈砖土、干火土灰等作为营养土,这是引起死苗较为普遍的一个原因。因为陈砖土中含有大量的硝酸钾的可溶性盐 Early rice dry cultivation is a major technical innovation in rice cultivation, showing significant yield increase in all the rice areas. Better seedling quality is the basis for high yield of early rice dry cultivation. However, the phenomenon of early rice dry seedling nursery phenomenon, has long been in some places, has become a barrier to popularization of the technology. Death caused by seedlings in the production of the following situations, we must find out the reasons for the specific circumstances and symptomatic prevention and control. Improper nutrition soil preparation. In some places, the use of dry brick Chen, dry ash and other soil as a nutritional soil, which is caused by a more common reason dead seedlings. Because Chen brick contains a lot of soluble salts of potassium nitrate