The invention discloses a method for applying a
fertilizer on oranges. With the method, a leaf
fertilizer-application mode is adopted when the orange is in different growth periods (successively a tree vigour restoration period, a period from white flower
bud to a
bud period, the period of blossom fall to young fruit formation, a young
fruit development period, a young fruit expansion period, a summer
shoot period, an autumn growth
germination period, an autumn growth aging period, a fruit expansion later period, a fruit color changing period and a fruit maturing period), or a mode of combining leaf spraying with flushing for spraying roots is adopted to apply one or a combination of a Bili water-soluble
fertilizer, a Zhuangli water-soluble fertilizer, a Huali water-soluble fertilizer, a
boron-force water-soluble fertilizer, a fruit setting water-soluble fertilizer, a high-
potassium flushed fertilizer, a root force
calcium water-soluble fertilizer, a Gaili water-soluble fertilizer, a fruit-expansion flushed fertilizer, a liquid for accelerating rooting and increasing
sweetness and a Hongguoli water-soluble fertilizer; thus various
nutrient components (especially
calcium,
magnesium, ferrum,
zinc,
manganese,
boron,
copper,
molybdenum and the like) required for each growth period are supplemented for oranges, so that the oranges can quickly and sufficiently obtain required
nutrient components in each growth period to keep balanced nutrients, thereby ensuring that the tips, the flowers, the fruits and the like of the oranges can normally grow.