One, ring cut flowers
In mid-September of the following year, the ring was cut with a circulator and the blade spacing was 0.3 cm. After the ring cut smear Hua Wang 2 (Southern product), can play a little control to promote the flower, the effect of flower protection and fruit preservation.
Second, pruning before flower
Winter trims should be lightly cut or not cut, with an emphasis on flowering. 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 preservation of fruit and fruit technology measures
1. Change hormones to promote fruit buds
From early to mid-April, before flowering, it was sprayed with melon and fruit, and its pedicels became longer and thicker, sepals became thicker, dense disks became larger, and buds decreased significantly.
2, after the change of flowers coated fruit for the hormone to promote fruit
With 10,10-6 2,4-D + 4010-6 boric acid 0.2%, while adding insecticides and fungicides, young fruit and flower buds were sprayed, from the flowering stage to the flowering stage, reducing the first physiological fruit drop.
3, remove the late spring shoots for circumcision control
Since the beginning of the Xiehua period, the result of vigorous growth and strong uprightness has been cut with a circumcision device and then applied to promote Huawang No. 2 (Southern Commodity). It is less harmful to the tree vigor and has little impact on the tree vigor. .
4. Use umbilical yellow inhibitor (FOWS) to prevent umbilical yellow
Umbilical yellow was found in the past and was removed with a knife, coated with 90% iodine and a bactericide. 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 post-management
1. Change drought resistance to drought prevention
The Xiehua period until the end of June is when young fruit is particularly sensitive to water. 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 period from June to October, timely irrigation.
2ã€Using uniform buds to prevent citrus leafminer
Before and after July 10, it was the low season of adult spawning of leafminer moth, concentrated in this period of time, and carried out chemical control. Before and after spraying, it was found that the sporadic autumn shoots were all smeared and the leaf miner was harmed. It happens rarely.
3, fertilization
In late June, the fruit was rejuvenated and the fertilizer was used to promote shoot fertilizer, which accounted for 60% of the annual production. 5 kg of oil cake, 3 kg of dried chicken manure, 1 kg of calcium magnesium phosphate, 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 fruit
In July, the canopy was sprayed with 2% lime water. In August and early September, young fruit and shoots were sprayed with 0.2% boric acid and the same amount of quick lime. The fruit cracking was significantly reduced compared to 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 Plant Protection Network: Wei Linfei)
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