多效唑是一种植物生长延缓剂,低毒,在果树上使用能使树体矮化、枝条缩短,控长促花坐果,通风透光提高产量。果树使用多效唑具有以下优点:施入土壤中后易被根部吸收,有效期长,使用一次可维持3~4年,对根系有促进作用,可降低树冠比。使用后可提高果树的抗旱、抗寒能力及果实品质和着色度。尤其在控制树体生长、控制徒长枝、简化夏季修剪和促进幼树提早结果、提高坐果率等方面效果十分显著。 Paclobutrazol is a plant growth retardants, low toxicity, use in the tree can dwarf the tree, shorten the branches, the control of long flower and fruit, ventilation and light to improve yield. Fruit tree using paclobutrazol has the following advantages: After applied to the soil easily absorbed by the roots, the effective period is long, the use can be maintained for 3 to 4 years, to promote the roots, can reduce the canopy ratio. Use can improve fruit trees drought, cold tolerance and fruit quality and color degree. Especially in the control of tree growth, control leggy branches, to simplify summer pruning and promote saplings early results, improve fruit set rate and other aspects of the effect is very significant.