在黄淮海及以南地区,夏季炎热高湿,韭菜种子的使用年限一般只有一年,超过年限的种子发芽率和田间成苗率就很低。播种这样的种子,不仅给农户造成了浪费,而且还误了农时,所以生产者需要掌握新陈种子的识别方 In the Huang-Huai-Hai and south of the region, summer hot and humid, the useful life of leek seeds is generally only one year, more than the age of the seed germination rate and field seedling rate is very low. Sowing such seeds not only causes waste to farmers, but also misses agriculture, so producers need to know the identification of new seeds