What are the planting techniques of pomelo trees? Transplanted pomelo trees are tall and leafy, and their roots are more developed than ordinary citrus varieties. Therefore, when opening a garden, we should first choose an area with a thick soil layer, with a minimum of 70cm. If the natural soil layer of land resources is not strong enough, it is necessary to increase the thickness of soil layer artificially. At the same time, some land improvement work can be carried out, such as subsoiling and drying, and increasing organic matter in the soil with green manure crops and river mud.
Because of the large crown of grapefruit and the row spacing of 4×5 meters, the utilization rate of land resources is relatively low. Therefore, other crops can be intercropped among pomelo trees, which can not only improve the annual output value of the field, but also improve the soil layer reasonably. The plants selected by intercropping are generally leguminous plants or vegetables, which has a large space utilization rate.
Transplanting generally chooses autumn and spring. In spring, the temperature rises and there is plenty of sunshine. Green plants are very easy to take root and the survival rate is high. When transplanting, select robust and disease-free reliable seedlings, dig a big pit with a thickness of 1 m, put a conical mound in the middle of the pit, spread the seedlings and rhizomes along the surface of the mound, and then turn over the soil to fill the soil. In the case of grafting, the grafting method should be at least 10cm away from the road surface to avoid pests and diseases in the soil eroding the seedlings from the interface.
Fertilizer and water management methods must be flexibly implemented according to crown diameter. The principle of fruit tree pruning and fertilization is "diligent fertilization and thin fertilization", which is applicable to all crops. Because the amount of fertilization is small during the seedling development, the amount of fertilization has been increasing during the growth process, unlike the old trees that store nutrients themselves. In the first two years, fertilizer and water were generally applied once a month, mainly based on base fertilizer. Every time100–150g urea is added to each tree, a little more farm manure can be applied to the poor soil layer, and the dosage can be gradually increased.
A little compound fertilizer can be applied in the bud stage of autumn and spring shoots every year to promote trunk expansion and grow branches, so as to prepare for a bumper harvest in advance. Results Fertilization on trees was generally 4 times a year. They are spring fertilizer, farmyard manure and urea. Summer fertilizer, mainly farm manure+phosphorus and potassium fertilizer. Autumn fertilizer is mainly farmyard manure+phosphorus-potassium fertilizer+urea, winter fertilizer+farmyard manure+phosphorus-potassium fertilizer+organic chemical green manure crops.
Pruning of fruit trees requires constant pruning to shape the harvesting tree as it grows. Generally, only 3-4 strong branches are left in the tree body, only oblique new branches are left, and long upright and steep branches are cut off to expand the coverage of the trunk and increase the total area of fallen leaves. Pruning of adult pomelo trees includes summer pruning and winter pruning. In summer, open the skylight and cut the branches at the top to increase the ventilation and light transmission in the inner chamber of the grapefruit tree. Cut loose branches near the road to prevent disease infiltration and nutrient competition. In winter, diseased branches, weak branches and transverse branches are cut off, and the soil is disinfected.
The pest control of grapefruit diseases is less than that of citrus fruits of the same sex, but it should also be attached great importance to prevention, otherwise more manpower needs to be invested to control and continue to endanger production.
Planting and maintenance seeds should be watered after planting, and it is best to keep the soil layer slightly wet, which is conducive to the germination of grapefruit trees. To get enough sunshine, it is best to let pomelo trees transmit sunlight every 6 hours. After careful maintenance for one month, a small amount of dilute liquid fertilizer is added to assist the rapid growth and development of pomelo trees.