Planting technique of Red Heart Shaddock

Red grapefruit is different from ordinary grapefruit in that its flesh is red and was first found in Heping County. The red natural pigment contained in red grapefruit is very good for the human body, and its anti-cancer effect is very amazing, especially for patients with heart disease and high blood pressure.

Planting technique of Red Heart Shaddock

1. Choose the place. The sloping land without pollution and the mountain with a slope of less than 20 °were selected for planting, and the soil was neutral and weak acid.

2. Land preparation. Under the condition of dry land, the tillage depth is 50-90cm by using powder ridge machine.

3. Grafting. The excellent scion of Hongxin pomelo was introduced, the local sour pomelo seedlings were selected as rootstock, and the grafting method was single bud grafting.

4. Planting. According to the plant distance of 4.5m X 6.2m Ling 420,500plants per hectare, the length, width and depth of each hole was 95cmX 95cmX 95cm, 2kg of soil fertilizer was applied in each hole, 25-50kg of mature human and animal manure, 200kg-300g of water-retaining agent and 0.5-1kg of compound fertilizer were applied. The roots of pomelo seedlings were treated with soil in fixed root water for 30 minutes and then dried naturally.

5. Seedling treatment. After survival of grafting, thin liquid fertilizer or dung water can be applied for 15-20 days, once a month, keep a strong new shoot of scion, cut the rest, wipe off the sprouting millet from rootstock at any time, unbind 20-30 days after grafting, in order to facilitate the healing and growth of grafting position, pay attention to watering irrigation to keep the soil or nutrient mud moist, when the stem of the new tip of scion is about 15 cm long, it can be planted in the nursery.

Fertilization skills of young trees of Hongxin pomelo

The main purpose of young trees is to cultivate branch tips and accelerate crown growth. Pomelo trees begin to send out new roots 15-20 days after planting. At this time, it is necessary to apply rotten human feces. The root system of one-year-old tree has weak fertilizer tolerance, so the principle of "frequently applying shoot application" should be adopted. 2-3 times a month, the fertilizer concentration increases gradually from light to light, and each shoot is guaranteed to have 1-2 times of heavy fertilizer. 5-10 jin of human and animal manure plus 0.1-0.2 jin of urea is applied to each plant in the first 15-20 days, or 1 jin of matured peanut plus 0.2 jin of urea can be used as strong shoot fertilizer. The application of fertilizer should be plate or annular shallow ditch, winter fertilizer or heavy fertilizer should be applied deeply, and the hole with length, width and depth of 60 × 30 × 30 cm should be applied, and the hole is located perpendicular to the outside of the crown. In the new shoot stage, 0.4% urea + 0.5% magnesium sulfate can be sprayed to accelerate the turning green.

Pest control, disease control and fruit protection

The main results are as follows: 1. The overwintering red spider sprays the medicine once before the spring shoot germinates in early February, adding water 2000 times for Kemente or 1000-1500 times for Nisolang in the middle of March.

2. Various diseases. In late February, young shoots are about 0.5cm-5cm before flowering, do not spray during flowering, use copper-ammonium mixture, one jin of copper sulfate plus five jin of ammonium bicarbonate, pack with film for 24 hours, add 1000 jin of water to spray the whole tree and the ground, or spring shoots about 0.5cm-5cm to spray 1-2 times before flowering and at the early stage of Xiehua young fruit, mix with topzine and Jinggangmycin. Or carbendazim 500 times water solution and Jinggangmycin 500 times water solution, use alternately.

3. Other insects. Other insects use dichlorvos to add 1000 times of water. Timely prevention and control of spring shoot diseases and insect pests can promote strong spring shoots, luxuriant branches and leaves, less disease in the early stage of young fruit after Xiehua, and high fruit setting rate.

Thinning flowers and shoots and picking hearts

1. Thinning flowers and branches. Adult fruiting trees or declining trees have a large amount of flowers, so some weak flower branches should be removed. It is generally carried out from mid-late February to early March. In principle, we should master the principle of getting weak and staying strong, leave 4-5 flowers on the mother branch of one fruit, and implement the principle of reasonable matching of morning, middle and evening in the whole tree. After flower thinning, concentrate tree nutrients to meet the growth needs of remaining buds, promote large buds, good flower quality and high fruit setting rate after flowering.

2. Thinning. Shoot thinning can improve the ventilation and light transmission of trees and reduce the harm of diseases and insect pests, which is an effective measure to improve the rate of fruit setting. Shoot thinning, generally thinning the top of the crown and the denser part of the periphery, the higher long branches are properly thinned, and the tender spring shoots in the crown and the short spring shoots on the outside of the crown are the mother branches in the coming year, which generally cannot be thinned. Spring shoot thinning can only be controlled within 5% of spring shoots, not too much. In order to increase the amount of leaves, produce more chlorophyll, improve the fruit setting rate, and achieve more fruits, high quality and high yield.

3. Pick the heart. Picking heart can improve fruit setting rate, accumulate tree nutrition, reduce ineffective nutrition consumption, hang more fruit, hang good fruit. Picking the heart is generally carried out at the top of the crown with long branches, and when the young shoot is 5-7 inches long, only 4-6 leaves are left.

Every step of the cultivation of red grapefruit is very important. When planting, we must be careful and careful, and we must do a good job of management in the later stage of planting in order to ensure the quality of the fruit. Hongxin pomelo not only tastes good, but also has great efficacy, so better planting will certainly bring good benefits for everyone.