越冬死苗是北方冬小麦生产上的一项重大灾害。为了减小损失,1979年新疆和北京市农科院,发起组织了“北方地区冬小麦冻害和防御措施研究协作组。”这个协作组成立以来做了大量工作,1984年5月在我省召开了第四次会议,在死苗原因和防御措施上都有重大突破,现摘要报道如下。 Winter overwintering is a major disaster in the production of winter wheat in the North. In order to reduce losses, in 1979, Xinjiang Academy of Agricultural Sciences and Beijing Municipal Academy of Agricultural Sciences initiated and organized the Collaborative Group on Research on Winter Wheat Freezing Injury and Defensive Measures in Northern China. Since its establishment, this group has done a great deal of work and was held in our province in May 1984 The fourth meeting made major breakthroughs in the causes and defensive measures of dead seedlings. The summary is as follows.