叶面施肥也叫根外追肥,它是将肥料溶解在水中,然后用喷雾器喷施在叶片上的一种施肥方法。一般喷洒后叶面附着量为30～60％,吸收量为附着量的40～80％。 叶面施肥与基肥、追肥相比较有下列好处:(一)避免土壤对肥料的固定和微生物对肥料的吸收和分解,用量少,肥料利用率高;(二)在土壤干旱不适于进行追肥时也能施用;(三)蔬菜吸收肥料 Foliar fertilizer, also known as top dressing, is a fertilizer that dissolves fertilizer in water and sprays it on the leaves using a sprayer. After the general spray foliar coating amount of 30 to 60%, the amount of absorption of the amount of 40 to 80%. Foliar fertilization compared with basal and topdressing have the following advantages: (a) to avoid soil fixation of fertilizers and microbial absorption and decomposition of fertilizers, with less dosage, high fertilizer utilization; (b) in the soil is not suitable for top dressing drought Can also be applied; (three) vegetables to absorb fertilizer