Plant growth regulators can enhance cell metabolism, promote cell division, and significantly increase the fruit setting rate of jujube trees. Commonly used are gibberellin, 2.4-D, naphthaleneacetic acid and paclobutrazol, etc., which have obvious effects on promoting flowers and fruits of jujube trees, and are in production. The most widely used is gibberellin. Gibberellin Gibberellin is generally used in the early stage of jujube tree blooming. Generally, when jujube trees have 5-8 flowers, spray 10-15 mg/kg of gibberellin once, which can promote pollen germination and stimulate unpollinated jujube flowers. , Improve fruit setting by 1 to 2 times. At the same time, it can be sprayed with micro-fertilizers and pesticides without reducing the effect. Increasing the depth and spraying frequency can increase the fruit setting rate, but the fruit tends to become smaller and the fruit drop is serious. Spraying naphthalene acetic acid or 20 mg/kg naphthalene acetic acid or 20 mg/kg antiloxin three times during the flowering and young fruit stages of jujube trees can increase fruit setting by 60%. Spraying 40-80 mg/kg naphthalene acetic acid after the jujube flower can reduce fruit drop by 23%-42%. 2.4-D spraying 20 mg/kg 2.4-D aqueous solution during the flowering period of jujube trees can increase the fruit setting rate by 40%; spraying 30-50 mg/kg 2.4-D after blooming can reduce fruit drop by 35%-40%. Paclobutrazol Paclobutrazol is a kind of growth retardant, which can effectively control the development of the tree, inhibit the growth of new shoots, thicken the leaves, and deepen the green color. It is used in dwarf and densely planted jujube gardens, and the effect is extremely obvious. Jujube saplings are generally used at a concentration of 800-1000 mg/kg, and mature trees are used at a concentration of 2000-2500 mg/kg, before flowering (late May), that is, when the jujube has grown to 8-9 leaves. The amount of spraying should be dripping from the leaves. Chlormequat jujube saplings were sprayed with a concentration of 2500-3000 mg/kg of Chlormequat every 15 days in late May for two times. The crown can be shorter than the control by 17%-30%, and the fruit setting rate can be increased by 2.26%. . Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone Medicine Granules,Granules Medication,Ephedra Licorice Granules,Flunixin Meglumine Granules Sichuan Aibang Weiye Biological Engineering Co., Ltd. , https://www.aibangpharm.com