在寒冷地区种植水稻,为了回避冷害,适当安排抽穗期是十分重要的.以往估算抽穗期多按生育期间有效积温推算,但在低温年份和早插的条件下所得的有效积温值常偏大,而在高温年和迟插时所得数值偏小.为了更加精确地估算水稻抽穗期,日 In order to avoid chilling damage, it is very important to arrange the heading date appropriately in the past.In the past, the estimation of effective heading time was based on the effective accumulated temperature during the growing period, but the effective accumulated temperature value was often larger under the conditions of cold temperature and early insertion, While the values ​​obtained during the high-temperature years and late-insertion were small.In order to estimate rice heading date more accurately,