微肥虽然用量甚微,却是蔬菜生长发育过程中不可缺少的营养元素。一旦缺乏任何一种微量元素,都会成为蔬菜高产的障碍因子。实践证明,合理施用微肥能起到“四两拨千斤”的作用,不仅使蔬菜增产,而且能改 Although the amount of trace fertilizer is minimal, but it is an essential nutrient in the process of vegetable growth and development. Once the lack of any trace elements, will become a high yield barriers to vegetables. Practice has proved that the rational use of micro-fertilizer can play a “big and small” key role, not only to increase production of vegetables, but also to change