农用稀土元素是指17种稀土元素中的镧、铈、镨、钕4种轻稀土元素。用于农业的主要是硝酸盐复合产品,即硝酸稀土。稀土可促进作物种子发芽、出苗,可改善光合器官形态,提高光合能力,促进根系生长发育和对营养物质的吸收,提高作物抗逆性,增加作物产量和提高品质。农用稀土是以水溶 Agricultural rare earth elements refers to the 17 kinds of rare earth elements in lanthanum, cerium, praseodymium, neodymium four light rare earth elements. The main agricultural use is nitrate composite products, namely rare earth nitrate. Rare earth can promote crop seed germination, emergence, can improve photosynthetic organ morphology, improve photosynthetic capacity, promote root growth and development and nutrient absorption, improve crop resistance, increase crop yield and improve quality. Agricultural rare earth is soluble in water