Red pomelo pomelo formation layer regeneration ability, the use of a reasonable girdling or circumcision, can promote young trees more long flowers, early results.

(1) Red meat honey grapefruit ring cut, ringing time. Ring cutting, girdling time is generally controlled in late November to early December flower buds. The time and degree of girdling are different due to the local climate and the flower bud differentiation status of red-fruited pomelo. Pinghe altitude is 260~400 meters. Plain red pomelo plucked in the plain area should be in mid-November. The altitude of 400~600 meters in the middle of the mountain should be 11 In the second half of the month, elevation above 700 meters should be in mid-December. If November-December does not rain for half a month or one month, or when the soil is dry, different measures should be taken for different tree ages and different tree vigor. Ring-cutting objects are generally the result of debilitating trees, while circumcision should be used for both the initial result tree and the vigorously growing adult tree. The trees above 10 years old are best not to be girdled. If the grapefruit grows well in the spring of the following year and the spring shoots are vigorous, it can be cut in a circle around the main branches in 5 days. The 6-10 year old tree depends on the tree vigor. The strong tree branch circumscribes the main branch (with a width of no more than 0.3 cm). The tree's mid-circle cuts twice, and the tree's weak is neither circumcision. Nor is it cut. The initial result tree is circumscribed at 1.0 cm from the ground (above the grafting site), the width is generally not more than 0.3 cm, or 0.2 cm is not peeled to facilitate healing. Low-lying areas or low temperatures in winter in the area of ​​0`-2C, it is advisable to leave a thickness of about 3 cm in the lateral branches without girdling.

(2) Red meat honey grapefruit ring width. General control in 0.3`0.5 cm, up to 0.6 cm for particularly prosperous trees. When girdling, it mainly protects the upper and lower incisions, requiring the incision to be smooth, neat and not broken. The girdling area is generally 10`20 cm above the ground. The higher the circumcision site, the weaker the healing ability, and the corresponding reduction in the width of circumcision.

(3) Red meat honey pomelo ring mouth protection. Immediately after circumcision, the wound was treated with 70% thiophanate-methyl 400 times to prevent resin and other bacterial infections. One month after circumcision, no later than the end of February of the following year, the ring is sealed and protected. Choose 1 piece of fresh cow dung, 2 pieces of clay, and 200 times solution of thiophanate, stir well and make it into a slime group, and then apply a ring to the mouth. If it is found that the smearing material falls off within 1 month, the callus from the upper and lower sides of the ring is not healed. Apply it again in time and wrap it with a plastic film to ensure that the wound heals.

(4) Red meat honey grapefruit girdling tree cultivation management points. Timely top dressing and picking leaves. After girdling, it is not advisable to spray pine alkali mixture in winter, but it can be carried out 15 to 20 days before girdling; it is not appropriate to deepen the soil in winter. Shallow ploughing (within 10 cm or less), combined with organic manure; unsuitable for spreading chemical fertilizers, especially urea, is suitable for external fertilization, 10 days after girdling, once every 10 days for 2 consecutive times. . The fertilizer was selected as a 500-fold solution of high-potassium high-Korol, 1000-times liquid Green No. 2 and 400-fold potassium dihydrogen phosphate, and 10% magnesium sulfate 0.6% urea. To be sprayed once at the spring shoot stage, one green time 1000-time liquid, and then another high-intensity type 500 times liquid high-inflammatory for 10 days, which can be combined with pest control at the same time. Spring shearing period, the length of 30 cm, the thickness of 1.5 cm in the erect slightly removed, or picking the heart left 5 leaves, in order to promote the spring shoot early turn green, early enrichment, reduce the first physiological fruit drop.

After the girdling, the pomelo tree, whose wounds did not heal normally, was wounded in the upper and lower phloem of the original excision wound with a sharp knife. The green wound 95 liquid was applied to the new wound, and then 10 times liquid green wind 95 soil was mixed. The wound was filled with a mixture of clay and finally wrapped in plastic film. At the same time, the top of the canopy was top dressing twice, separated by 10 days. http://

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