“920”植物生长激素的研究和应用已在全国迅速推广,而“920”的效价又是生产上、应用上的重要数据,所以全国各地已研究出各种土办法来进行测定,但是测定的数值粗略,不够准确。采用四用萤光计和普氏光度计等仪器测定,又因仪器价格昂贵,不便推广,解决不了贫下中农的急需。鉴于研究出一种测定“920”效价的简单仪 “920” plant growth hormone research and application has been rapidly promoted in the country, and “920” titer is production, the application of important data, so all over the country have been studied various methods to determine the soil, but the determination The value of rough, not accurate enough. The use of four fluorometer and Platts photometer and other equipment, but also because of the high cost of the instrument, inconvenience to promote, can not solve the urgent need of poor peasants. In view of the study developed a simple “920” titers