稀土又叫常乐，是一种由镧和铈为主的多种微量元素组成的粉状物质。镧元素能够促进小麦对氮素的吸收，铈元素能够促进对磷素的吸收，镧和铈混合施用，可对小麦吸收氮和磷营养元素有较强的调节作用。据调查：施用适量的稀土，可以促进小麦发芽，使小麦根系发达，生长旺盛，叶面? Rare earth is also called Changle, which is a kind of powdery material composed of trace elements such as lanthanum and cerium. Lanthanum can promote the absorption of nitrogen in wheat, while cerium can promote the absorption of phosphorus and the mixture of lanthanum and cerium, which can regulate the absorption of nitrogen and phosphorus in wheat. According to the survey: the application of the right amount of rare earth, wheat can promote germination, wheat root system developed, vigorous growth, foliage?