作物的正常生育需要一个良好的环境,适时适量补充其生长过程中所必需的营养元素,才能达到稳产、高产、优质、高效的生产目的。我国耕地由于区域性的差异,土壤间不同程度的存在一些营养元素的不足或成份间比例失调。其中不乏微量元素。虽然微量元素的缺乏不如大量元素普遍,但在生产 The normal crop growth needs a good environment, timely and adequate replenishment of nutrients necessary for its growth process, in order to achieve stable production, high yield, high quality and efficient production purposes. Due to the regional differences in cultivated land in our country, there are some deficiencies of nutrient elements or imbalances among the components in different degrees in the soil. Many of them trace elements. Although the lack of trace elements is not as common as a large number of elements, but in the production