实践证明 ,把微肥释后对蔬菜叶面喷施 ,是一种经济有效的施用方法。喷施过程中要把好“六关” :浓度关。一般来说 ,各种微肥适宜的喷施浓度是 :硼酸或硼砂溶液 0 .0 5%～ 0 .2 5% ;钼酸铵溶液 0 .0 2 %～ 0 .0 5% ,硫酸锌溶液 0 .0 5%～ 0 .2 % ;硫酸铜溶液 0 .0 1 %～ 0 .0 2 Practice has proved that the micro-fertilizer on the foliage after spraying, is a cost-effective method of application. Spray process should take a good “six off”: concentration off. In general, a variety of fertilizers suitable spray concentration is: boric acid or borax solution 0. 0 5% ~ 0 25%; ammonium molybdate solution 0. 0 2% ~ 0 0 5%, zinc sulfate solution 0. 0 5% ~ 0 .2%; copper sulfate solution 0. 0 1% ~ 0