After the papaya tree is planted in the field, it will enter the result period in 4-5 years. Grasping the scientific management of the fruit tree growth period will steadily obtain the high quality and high yield of papaya.
First, the application of pre-flowering fertilizer in the middle and late March is also an early spring festival. The branches of papaya trees begin to show young flower buds. At this time, it is necessary to apply a pre-flowering fertilizer to promote flower bud differentiation. The NPK compound fertilizer is used in the pre-flowering fertilizer, and the method of trenching is generally adopted according to the dosage of 5 kg per mu. The specific location of the ditch is directly below the outer edge of the canopy. Otherwise, it is easy to hurt the root too close, and too far will affect the fertilizer effect. Second, foliar spray fertilizer in the papaya tree before flowering, young fruit period, fruit expansion period spray "strong fruit tingling" +0.4% ~ 0.5% urea +0.2% ~ 0.3% potassium dihydrogen phosphate, add papaya flowers and fruits The nutrients needed during the period to prevent falling flowers and fruit, improve the fruit setting rate, preserve the flowers and preserve the fruit, and make the fruit color good and fruity. Third, the flowering cycle of papaya is prone to large and small years, in order to avoid large and small, can be cut in the flowering period. Use a blunt blade to cut the sap of the trunk, deep into the xylem, and then apply the cationic active agent "foliar fertilizer" to allow the agent to enter the slit. The trees that grow more vigorously are used once every 10-15 days, and the trees are used once again for about 30 days. Apply "foliar fertilizer" by ring cutting, so that papaya can bloom more and more fruit, and produce high quality. 4. Thinning fruits and vegetables begin to bloom and thin fruit from the flowering stage. According to the size of the fruit and the load of the various branches, the fruit and the fruit are scattered. The roots of the branches and the fruit of the middle are kept as much as possible on the main branches. The fruits inside the crown are not easily affected by wind and wind, and can be left more. The distance between the fruits is about 20 cm for large fruit and about 15 cm for small fruit. In order to fully color the fruit, the leaves around the fruit should be removed. V. Pest Control Papaya is mainly harmed by aphids, heartworms and beetles. Aphids grow from the early branches and leaves, and the habits of locusts can be combined with the “head-heading†management measures of the new branches of papaya trees to remove the tops of the new branches. Note that the cut branches should be collected and destroyed to prevent the mites from escaping and continue to harm. The wounds caused by pruning are closed in time with a "healing anti-corrosion film" to prevent cracking and pest damage. The diseases of papaya are mainly dry rot and leaf spot, different growth stages and different varieties, and the degree of damage is different. For dry rot, scrape off the lesions, expose the living parts, and then apply the "tree general" + stone sulphur or fungicide. Branches with heavier diseases can be removed directly with plastic pruning. In summary, during the growth period of papaya, the tree potential must be strengthened to ensure the nutrient balance of the tree, provide sufficient nutrition for the flowering period, and increase the fruit's swelling vitality, thereby improving the quality of the fruit.
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