First, the ring cut flower promotion In mid-September of the following year, with a ring cutter on the standing Wang branch ring cut, blade spacing of 0.3 cm. Cut 0.3 centimeters without cutting at the beginning and end of the cutting mouth. As a nutrient transport passage, it can not only promote flowers, but also prevent a large number of fallen leaves from being caused by improper cutting. Second, pruning before winter pruning trim should be light or not cut, focusing on flowers before. The tall branches of trees are generally more prosperous, and even after the branches are treated, the branches are still dense, the crown can transmit light poorly, and the buds are unevenly distributed on the canopy. In late March to late April, sparse squid branches, overlapping branches and dense inner branches in the middle of erection were removed, and flower branches were retained as much as possible. After trimming, the crown was erected, creating conditions for three-dimensional results. Third, improve the technical measures to preserve and preserve the fruit 1. Change the hormone to promote fruit to protect buds in advance from early to mid-April, before flowering with synergistic liquefaction BA+GA (developed by China Citrus Research Institute), 0.6 kg per 10 ml of watered. , pedicel. The emphasis is on flower buds, crowns, and buds in the lower and middle parts of the flower buds. After 10 days, compared with the adjacent buds, the pedicels became longer and thicker, the sepals became thicker, the dense disks became larger, and the buds decreased significantly. 2. After flowering, the fruit was sprayed with hormone to promote fruit use of 1010-6 2.4-D+4010-6 boric acid 0.2%. At the same time, pesticides and fungicides were added, young fruit and buds were sprayed, and were carried out from flowering stage to flowering stage. , reduce the first physiological fruit drop. 3. The eradication of the late spring shoots was the beginning of the circumcision control shoots and the flowering period began. The result was strong and vigorous. The result was a branch with a circumcision circumcision and then a plastic band. Due to pruning during flowering, it is easy to shoot. Increase the shedding of young fruit. The circumcision control effect is good, and it takes a long time. The wound will heal before the end of June, without affecting the autumn shoots. 4. Umbilical yellow inhibitor (FOWS) was used to prevent umbilical yellow in the past and umbilical yellow was found in the past. In late May of 1995, the use of umbilical yellow inhibitor Fows (developed by the Chinese Orange Research Institute), 0.3 kg of umbilical water per 10 ml of water, can improve the fruit setting rate, and can prevent umbilical yellow, fruit umbilical Huang is rarely found. Fourth, fertilizer and water management and later management 1. Change the drought-resistant drought-fenced flowering period until the end of June, which is particularly sensitive to young fruit. If the young fruit period is high temperature and drought, we should make full use of sprinkler irrigation facilities, sprinkling irrigation sooner or later, once a day for 7 days, and change it to be active. And in the spring budding period, autumn shoots and fruit expansion from June to October, timely irrigation. 2. Controlling and disposing of uniform shoots on citrus leafminers. Before and after July 10, it was the low period of adult spawning of leaf miners, concentrated on the shoots during this period of time, and carried out chemical control. The results were compared before and after spraying. All of the autumn shoots are troweled, and leaf miners are rare. 3, fertilization in late June heavy fruit to promote shoot fertilizer, fertilizer accounted for 60% of the year. 5 kg of oil cake, 3 kg of dried chicken manure, 1 kg of calcium magnesium phosphate fertilizer, 0.5 kg of potassium chloride (made in Canada), and 1 kg of carbonamine. Potassium chloride is spread over the rhizosphere and sprinkled or sprinkled before spraying. Fertilizers were applied in early September and the types and quantities of fertilizers mentioned above were still used except for the absence of carbonic amines. 4. Prevention of sunburn and cracking In July, the canopy was sprayed with 2% lime water. In August and early September, 0.2% boric acid and the same amount of quick lime were used to spray young fruit and young shoots. The fruit cracking was significantly reduced compared with previous years. High branch navel orange, uneven flower bud distribution, less flowering drought, abnormally high temperature during young fruit period, improvement of fruit-promoting measures, especially application of synergistic liquefied BA+GA and umbilicus inhibitor Fows, and mixture of boric acid and quicklime in autumn Spraying cloth, to protect the fruit, reduce umbilical yellow, reduce cracking fruit to play a good role. China Agricultural Network Editor
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