1. Pomelo orchards should be built in sandy loam with abundant water resources, deep soil layer and fertile soil. The garden should be of the same height, with a row spacing of 3m× 3m, and the planting method should be triangular. As long as the young branches are mature, red-fleshed honey pomelo can be planted all year round.
2. Selection of strong seedlings: select one-year-old grafted seedlings with developed roots and strong growth for planting. Under good management conditions, seedlings can quickly resume growth and crown formation is also faster.
3. The important measures to enlarge holes, improve soil fertility and improve site conditions are the basis of early fruiting, high quality and high yield. Generally, reaming and soil improvement are started in the second year after planting, and the best effect is achieved in the third year. The specific method is to symmetrically dig ditches with a depth of 60-70cm and a width of 40-50cm on the lower sides of the drip line of the tree crown, fill in one load of green manure and one load of burnt soil, 65,438+0.5 kg of calcium magnesium phosphate fertilizer, and appropriate amount of lime and topsoil, and apply them in layers to improve the soil by compaction.
4, reasonable pruning, correct girdling (cutting) pruning principle: thinning branches, cutting more branches outside the crown, and cutting less branches inside the crown. Pruning time: young pomelo trees are generally pruned twice, that is, summer pruning and winter pruning; Results Pomelo trees were pruned three times, namely spring pruning, summer pruning and winter pruning. Prune in February-March in spring, May-July in summer and half a month after fruit picking in winter, that is,10-1month. Pruning method: Don't adopt the "one size fits all" method, and focus on thinning the peripheral branches. For the dense crown, you can adopt the "skylight" pruning method. This method can effectively control the crown, promote the germination of inner cavity branches, and avoid the reduction of production due to cutting again. Fruiting branches, dead branches, diseased branches and weak branches should be cut off. In late September, the pomelo trees with flourishing leaves and no or less flowers were girdled. The method of girdling (cutting) is: girdling is used on the trunk or the main branch with a diameter of more than 6 cm, reaching the xylem. After treatment, the wound is treated with 70% fluoromethoxymethyl sulfide 800 times solution or 60% fluoroxywettable powder, which will not have adverse effects on tree vigor and yield. The method of girdling (cutting) can inhibit vegetative growth, promote flower bud differentiation, increase flower quantity and ensure yield.
5, scientific fertilization, improve quality.
Fertilization method: apply fertilizer around the furrow, and apply fertilizer 3-4 times a year according to the requirements of "applying base fertilizer in autumn, carefully applying fertilizer to accelerate germination, and applying fertilizer to protect and strengthen fruits". Mainly use decomposed organic fertilizer, supplemented by inorganic fertilizer, and apply more phosphorus and potassium fertilizer. Apply 20-30 kilograms of pig manure to the plants to accelerate germination, and apply it from the end of February to the beginning of March. Fruit-preserving fertilizer is mainly topdressing outside the roots, spraying high-potassium humic acid Kangbao or Lvjin or 0.3% urea +0.2% potassium dihydrogen phosphate, applying 20-40 kg pig manure to the plants to strengthen the fruits, and applying 40-60 kg stable manure to the plants to pick the fruits.
6, reasonable fruit thinning,
Bagging should first remove abnormal fruits, small fruits and pests, and the leaf-fruit ratio is generally (160-200): 1. After fruit thinning and fruit fixation, bagging is carried out when the young fruit grows to the single fruit weight 100- 150g and the fruit transverse diameter is about 5cm. Pay attention to the width and tightness when bagging, so as not to loosen the bag mouth or damage the fruit handle. Please refer to.