Promoting High Yield of Jujube Tree by Proper Fertilization

Only by applying fertilizer scientifically and rationally can jujube trees enhance their tree potential, improve their resistance to diseases and insect pests, improve their quality and increase their yield. The fertilization of jujube can be divided into base fertilizer and topdressing fertilizer. The scientific application period of base fertilizer was from the mature period of jujube fruit to the soil thawing in the following year, and topdressing was carried out in the early sprouting stage, flowering stage and rapid fruit expansion stage of jujube tree. Base fertilizer plays an important role in the growth of jujube. The germination, flower bud differentiation, flowering and fruiting of jujube mostly consume the storage nutrition of last year. In order to increase the storage nutrition of the tree, we should strive for early application of base fertilizer. The application of base fertilizer is the best in the mature period of jujube fruit, at this time, the leaves still have high photosynthetic efficiency, sufficient sunshine, high air in autumn, large temperature difference between day and night, and fertilizer has a long time to decompose in the soil, which is beneficial to the accumulation of organic nutritions. it is convenient for jujube sprouting, flower bud differentiation, branch and leaf growth, flowering and fruit absorption and utilization. The base fertilizer is mainly organic fertilizer such as fully mature high-quality ring manure and barnyard manure, which can be properly combined with some quick-acting fertilizer. The amount of fertilizer applied to young trees is generally about 10 kg per tree, and the fruiting tree depends on the yield, which is generally applied quantitatively by "jin jujube jin fertilizer". At present, there is less livestock and poultry breeding, resulting in a serious shortage of organic fertilizer, which can be replaced by bio-organic fertilizer. Nitrogen fertilizer is the main topdressing fertilizer in the germination stage and full flowering stage, generally 0.75 kg pure nitrogen is applied to each fruiting tree, and phosphorus and potassium fertilizer is the main topdressing fertilizer in the fruit rapid expansion stage, and 0.8 kg diammonium phosphate and 1 kg potassium sulfate are applied to each jujube tree in the full fruiting stage. the ring multi-point method is often used. In order to save labor investment, foliar topdressing can be combined with spraying to control diseases and insect pests, spraying water during flowering and spraying growth regulators, spraying urea, potassium dihydrogen phosphate and other trace elements as extra-root topdressing to promote jujube fruit growth.