一、适量疏花。在密橘树盛花期喷雾100PPM的乙烯剂,可控制授粉,抑制胚的生长,促使花果脱落,能起到疏花作用,及保花保果的效应。然后在谢花三分之二时,喷施8—10PPM的防落素或50PPM的赤霉素,加0.5％的尿素,0.3％的磷酸二氢钾和0.2％的硼肥,隔10—15天喷2次,若不用硼肥或改用0.2％的硫酸锌也能具有同样的效果。 二、营养保果。一般温州密橘有两次落果 First, the amount of flowering. Spraying 100PPM of vinyl in full blossom orange flower can control pollination, inhibit the growth of embryo, promote flower shedding, can play the role of thinning flower, and protect the effect of flower and fruit. Then in Xie two-thirds of the time, spray 8-10PPM of the anti-pigmentation or 50PPM of gibberellin, plus 0.5% urea, 0.3% of potassium dihydrogen phosphate and 0.2% boron, every 10-15 Spray 2 times, if you do not use boron fertilizer or use 0.2% zinc sulfate can have the same effect. Second, nutritional preservation. General Wenzhou dense orange two fall fruit