一、微量元素的含量目前,在下列两种情况下,土壤中微量元素的状态已成为科学研究的对象。一种情况是当任何一个重要的微量元素开始限止植物的正常生长时,另一种情况是土壤被怀疑为受到重金属的污染时。对亚洲热带土壤的微量元素状态进行研究是很重要的。因为一方面人们常常向土壤中施入作物所需要的大量元素,特别是N和 First, the trace element content At present, in the following two cases, the status of soil trace elements has become the object of scientific research. In one situation, when any significant trace element begins to limit the normal growth of the plant, the other is when the soil is suspected of being contaminated with heavy metals. It is important to study the trace element status of tropical soils in Asia. Because on the one hand, people often apply large quantities of crops to the soil, in particular N and