Key points of guava cultivation techniques "global fruit seedlings" (1) Planting: 1. Selection of planting site: Guava has low requirements on soil and strong adaptability, but it grows fast and needs a lot of fertilizer and water. In order to get early fruit and high yield, it is best to choose plots with deep soil layer, fertile soil and good drainage for planting. 2. Planting specifications: generally 80- 100 plants are suitable, and the specifications are 2.5mX2.5m or 3X3m. 3. Requirements before planting: 1) Dig a pit, and the specifications depend on the soil conditions. Generally, the length, width and depth are required to be 80cm and 60cm respectively. 2) Apply sufficient base fertilizer, which can be soil miscellaneous fertilizer, chicken manure, livestock, etc. , and add 0.8- 1.0 kg of calcium magnesium phosphate fertilizer. 4. Planting season: Guava can be planted all year round if it is planted with nutritious bag seedlings. If it is planted with root seedlings, it will be planted better in spring and the survival rate will be high. The planting depth of seedlings should not be too deep, and it is advisable to cover the root neck with 5cm of high seedling emergence and spray the roots with water. (2) Fertilizer and water management The newly planted young trees mainly keep the soil moist. Water and fertilizer can be applied 2-3 times 30-40 days after planting. It is best to use organic decomposed fertilizers such as human manure and pig manure water to promote the vegetative growth of young trees, and apply them once every two months. Apply ternary compound fertilizer 100-200g/ plant at the initial stage, and ternary compound fertilizer 300-400g/ plant for two-year-old trees, and add organic fertilizer and potassium fertilizer to improve fruit quality. (3) After the young trees are planted, they are allowed to grow for a period of time, and then they are cut off at 40-50 cm from the ground to promote branching, leaving 6-8 evenly distributed branches as the main branches, thus cultivating a short and fruitful crown. Every time the new shoots are drawn to a length of about 30cm, they are cored or chopped. (4) Flowering guava is easy to flower and has a high fruit setting rate. In order to promote fruit growth, achieve the goal of big fruit, high yield and high quality, and improve economic benefits, it is necessary to bloom and thin fruit. Flowers become thinner when they are in full bloom, and fruits generally become thinner after flowers wither, when young fruits grow to the size of fingers. Each branch only needs 1-2 fruits, leaving 6 pairs of leaves. (5) Fruit bagging Fruit bagging is an important cultivation technical measure. Bagging can not only protect fruits from pests and diseases, but also promote fruit development. The produced fruit has beautiful appearance and high commodity value. When the young fruit grows to the size of table tennis, it can be bagged. Before bagging, spray bactericide and insecticide, and then bag. Bagging material: the inner layer is a foam net bag and the outer layer is a transparent film bag. Put the two layers on at the same time, cut a hole at the lower end after bagging to let the water vapor in the bag out. When the fruit is harvested, the fruit and the bag are picked together, and the bag can be reused after cleaning, saving cost. (6) Pests and diseases control Guava is rare, and the main diseases are: leaf spot, orange disease, branch orange disease, anthracnose and so on; Pests mainly include: fruit flies, scale insects, leaf curl moths, red spiders and so on. Prevention and control methods: Both diseases can be treated with bactericidal pesticides and pests can be treated with pesticides, all of which can achieve good results. In recent years, fruit flies have done serious harm to guava, so special attention should be paid to prevention and control. The best control method is fruit bagging.