微肥是蔬菜生长发育过程中不可缺少的营养元素,把微肥稀释后作叶面肥喷施,花钱少、见效快、效益高。其技术要点是: 一、喷施浓度。浓度适宜才可收到良好的效果,切忌浓度过高,否则不但无益,反而有害。各种微肥在蔬菜上适宜喷施浓度为:硼砂或硼酸,0.05%～0.25%;钼酸铵,0.02%～0.05%;硫酸锌,0.05%～0.2%;硫酸锰,0.05%～0.1%;硫酸亚铁,0.5%～1%;硝酸稀土0.03%～0.1%。二、喷施时期。要根据不同的蔬菜品种和不同的微肥确定,一般以在开花前喷施为宜。在阴天或者晴天的下午到黄昏喷施,以尽可能延长肥料溶液在蔬菜茎叶上的滞留时间,提高喷肥效 Micronutrient is an indispensable nutrient element in the growth and development of vegetables. When the fertilizer is diluted, it can be sprayed on the foliage fertilizer to reduce the cost and quicken the benefits. The technical points are: First, spraying concentration. Concentration appropriate to receive good results, avoid concentration is too high, otherwise not only useless, but harmful. Various kinds of trace fertilizers are suitable for spraying on vegetables: borax or boric acid, 0.05% to 0.25%, ammonium molybdate, 0.02% to 0.05%, zinc sulfate, 0.05% to 0.2%, manganese sulfate, 0.05% to 0.1% ; Ferrous sulfate, 0.5% ~ 1%; rare earth nitrate 0.03% ~ 0.1%. Second, the spraying period. According to different varieties of vegetables and different determination of micro-fertilizer, generally sprayed before flowering appropriate. In the cloudy or sunny afternoon to evening spraying, in order to maximize the fertilizer solution in vegetable stems and leaves of residence time and improve fertilizer efficiency