Causes of Citrus Fleeting
1, related to the breed
Floluta fruit mainly occurs in the late stage of fruit ripening, and it is easily peeled from the broad-leaved citrus fruits such as Satsuma mandarin, Sakaguchi (5), ç–¤ 佟, 佟, 鸬, 鸬, 鸬, ((5), 幌喾矗, ã³, ã³, ã³, ã³, ã³, ã³, ã³, ã³, ã³, ã³. (d) Frame 20. Really still chasing (5)?T Discarding files?Cigar?Small?(9)?Pins???????????????????ç› âˆ‘ã™ âˆ‘ã™ âˆ‘ã™ èŸ ç¬¤é¾†å”· èŸ ç¬¤é¾†å”· èŸ ç¬¤é¾†å”· èŸ ç¬¤é¾†å”· èŸ ç¬¤é¾†å”· / /
2, related to fruit size
The bigger the fruit, the more severe the floating skin. Strong fruits and young trees produce fruit with less fruit. Fruits with younger trees produce fruit. Fruits at the top of the crown, ascending fruit, and rough shank, have better nutrient conditions and become more coarse and large. Floats appear.
3. The occurrence of heavy orchards that have been delayed
The application of strong fruit fertilizer is too late. Excessive nitrogen in the fruit tree not only affects the coloration and maturation of the fruit, but also promotes the secondary hypertrophy of the fruit, which contributes to the occurrence of floating skin.
4, late harvest occurred heavy
Delayed harvest, skin aging, prone to skin. The later the harvest period, the more severe the floating skin.
5, related to environmental conditions
In the years when there is less rainfall during the mature period and the climate is drier, there is less occurrence of the floating skin fruit; on the contrary, if the rainfall is large, the temperature is high and the humidity is high, the floating skin easily occurs.
6, the lack of calcium and boron deficient fruit weight
Calcium is the most important factor determining the hardness of fruit. Insufficient calcium in fruit enlargement period, loose connection between peel cells, poor toughness, it is easy to produce floating skin. The lack of boron in citrus causes calcium deficiency, which in turn promotes the occurrence of floating fruit. Citrus peel uneven, mostly caused by calcium deficiency, lack of boron.
Citrus skin protection measures
1, reduce the humidity of the orchard
Doing this well is especially important for dense planting gardens and flatland gardens. During the ripening and coloring of fruits, a large amount of water should be avoided, and attention should be paid to the drainage of the gutters to reduce the humidity of the orchards as much as possible, and the orange orchard should be ventilated and light-transmitting to create environmental conditions that are not conducive to the occurrence of floating skin.
2. Reasonably thinning the fruit to ensure proper amount of tree results
If too much fruit is placed in the tree, the skin will be stunted and there will be more floating fruit. To reduce the occurrence of floating skin, fruit thinning should be carried out after the fruit is stable. The degree of fruit thinning is usually determined according to the ratio of leaf to fruit required for the high yield of citrus.
3, increase potassium fertilizer, early application, re-build strong fruit fertilizer
Strong fruit fertilizer application time should not be too late. Poor irrigation conditions, weak tree vigor, and fruitful results should be given early. Fertilizer types are quick-acting organic liquid fertilizers or nitrogen, phosphorous, and potassium fertilizers. It is imperative that partial fertilizers be applied and urea and other nitrogen fertilizers be reused. When Shi Zhuang fruit fertilizer is added, 0.5 to 1 kg of potassium sulfate or potassium chloride per plant is applied, and 0.3% of Potassium Phosphate, potassium dihydrogen phosphate and other potash are applied to the crown to thicken the peel and enhance the pliability of the peel, thus reducing pre-harvest skin fruit.
4, timely harvest in batches
Fruits that are sold or stored for storage should be harvested at about 80% maturity, that is, fruit surface 2/3 turns yellow, so it is appropriate to choose Huang Liuqing and harvest them in batches. Fruits that are directly sold directly can be harvested after they are cooked and sold as soon as possible after harvest.
5, increase calcium fertilizer
The addition of calcium fertilizer can enhance the pliability and fruit firmness of citrus peel, thus reducing the occurrence of floating skin fruit. There are two ways: First, the soil calcium. Every year after the fruit is harvested and before germination the next year, lime powder is uniformly distributed in the whole garden in combination with the soil (the amount of mu is 40-50 kg). The addition of calcium superphosphate or calcium magnesium phosphate fertilizer (amount: 0.5 to 1 kg/plant) in the fruit extract fertilizer can also play a role in calcium supplementation. The second is the fruit spray calcium, the best calcium chelate. There have been studies showing that the use of inorganic calcium compounds alone can reduce the skin, but also reduce the effect of fruit quality. The calcium-containing compound nutrient solution significantly inhibited the occurrence of skin rind, and the effect of the high calcium nutrient solution was better than that of the whole nutrient solution.
6, spraying boron on the surface
In the citrus flower phase, young fruit period, and strong fruit period, each spray 0.1% to 0.2% borax or boric acid, supplement the body boron nutrition, promote the absorption of calcium, thereby reducing the occurrence of floating skin fruit.
7, the fruit before spraying gibberellin
One month before citrus fruit coloration, it was a high incidence of physiological pupa. Production can be in the 20 to 25 days before the harvest, spraying the fruit once 5 ~ 10 mg / liter of gibberellic acid to delay fruit aging and reduce the occurrence of floating skin fruit. However, there will be green patches on the skin, and will not fade after storage, affecting the appearance of the fruit. So this method is not recommended!
8, create a cool storage environment after harvest
Citrus ovirrhea, also known as dry water during storage, occurs when the skin of the broad-leaved citrus is flaky, skin and meat are separated, and the cells of the capsular sac are dehydrated and shrank. This has a great influence on the quality of storage. Years of storage practices have shown that the results of small trees, short “sweating†periods, and high humidity during storage can easily cause fruit to dry. Therefore, pay attention to picking fruit from older trees during storage and within 3 days of harvesting. As soon as possible, dip fruit with antiseptic and fresh-keeping agents to soak the entire fruit for 3 to 5 seconds.
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