一、ESD及其试验甜菜是我国主要制糖原料之一,发展甜菜生产,提高产糖量,对满足人民生活需要有重要的意义。近年来,我国的甜菜生产单位面积产量迅速提高,而甜菜块根中的含糖率却提高得较为缓慢,甚至有所下降。为了寻求提高块根含糖的新途径,我们于1978～1980三年进行了ESD增糖剂(简称ESD)的叶面喷洒试验。 ESD增糖剂是乙醇胺和丁二酸的混合剂, First, ESD and its test Sugar beet is one of the main raw materials for sugar production in China. It is of great significance to develop sugar beet production and increase sugar yield to meet the needs of people’s lives. In recent years, the yield per unit area of ​​sugar beet production has been rapidly increased in our country, while the sugar content in sugar beet roots has increased slowly or even decreased. In order to find a new way to improve the sugar content of roots, we carried out the foliar spray test of the ESD-enhancing agent (ESD) in the three years from 1978 to 1980. An ESD booster is a mixture of ethanolamine and succinic acid,