微素虽为作物所必需,但其用量小,专一性强,对作物的有效量与中毒量之间的范围窄,施用不当不仅效果差,还会污染环境、毒害作物。因此,施用微量元素肥料要讲究针对性。 Although microcrystalline is necessary for crops, its use amount is small and its specificity is strong. The range between the effective amount of crops and the poisoning amount is narrow. Improper application not only has poor effect but also pollutes the environment and poison crops. Therefore, the application of trace element fertilizer should pay attention to pertinence.