提高干旱冷凉山区水稻成秧率的一项有效措施低温冷害引起水稻烂秧是制约冀北冷凉山区水稻生产的一大难题。河北承德地区每年都有因水稻烂秧而延误农时现象发生。１９９２年我所引进植物抗寒剂ＣＲ—４应用于水稻浸种试验，１９９３年进行了大面积试验、示范，示范田３５０... An effective measure to improve the rate of rice seedling emergence in cold and cool mountainous areas Rice seedling is a major problem restricting rice production in cold and mountainous area of ​​northern Hebei due to chilling damage. Every year in Chengde, Hebei Province, there is a delay in farming due to rotten rice seedlings. In 1992 I introduced plant cold agent CR-4 used in rice soaking test, in 1993 conducted a large area test, demonstration, demonstration field 350 ...