稀土元素是镧系元素 (镧、铈、镨、钕、钜、钐、铕、钆、铽、镝、铒、铥、镱和镥 )以及与其性质相近的钪和钇等 17种金属元素的总称，稀土元素又简称稀土。具有稀土标明量的肥料称为稀土肥料。稀土肥料在粮食作物和经济作物上都有广泛的应用，但烟草上应用尚不多见。我们于 1 The rare earth elements are the general term for 17 kinds of metal elements such as lanthanides (lanthanum, cerium, praseodymium, neodymium, trichloromethane, samarium, europium, gadolinium, terbium, dysprosium, erbium, gallium, ytterbium and gallium) , Rare earth elements, also known as rare earth. Fertilizers labeled with rare earth are called rare earth fertilizers. Rare earth fertilizers have a wide range of applications in food crops and cash crops, but the application on tobacco is still rare. We are at 1