Why aren t my citrus sweet enough? Why is sweet mandarin so sweet?

Citrus, when the temperature reaches 40, there is leaf burning, 37 when the growth stops, 35 is prone to sunburn, if accompanied by 2 days of heavy rain, there is also the possibility of brown rot.

The direct rays of the sun heralded the official arrival of summer in the northern hemisphere, with high temperatures, heavy rains, droughts and other bad weather appearing one after another, and citrus fruits are particularly prone to canker and anthrax under high temperature conditions, and the peel is also prone to sunburn and burns.

The influence of temperature on fruit quality is mainly concentrated in acid removal, sugar application, and color change. If the air temperature in the orchard is not well controlled, and preventive measures are not taken in time before the high temperature comes, there will be: citrus skin has more yellow spots, citrus is not sweet enough, and fruit drop is serious.

This is an orchard we visited earlier, due to high temperature and heat damage, there was a serious fruit drop, and this year's yield is a bit hanging!

When the heat comes, how do citrus groves respond?

1.Hole irrigation and ditch irrigation are used.

Hole irrigation and furrow irrigation technology can be used to improve the scientificity and effectiveness of irrigation.

The specific method is to excavate 1 2 soil pits of 30 30 30 30 cm at the outer third of the drip line of fruit trees, fill them with about 50 liters of water in turn, and then cover more than 10 cm thick weeds, so that the citrus trees are basically not affected by drought.

Experts especially remind to pay attention to the time of irrigation. The soil temperature is too high during the day, and after irrigation, the water will evaporate quickly. Therefore, it is best to choose the time to irrigate the orchard before 10 o'clock in the morning or after 5 o'clock in the afternoon.

Before and after irrigation, cover the bottom of the canopy and around the main trunk with weeds and straw. In this way, the labor intensity of irrigation workers can be reduced, and the evaporation of water can be reduced, so as to achieve the purpose of irrigation.

2.The tree tray is covered with grass.

For orchards without irrigation conditions, the application of tree tray cover grass mulching technology should be promoted, which can effectively reduce the evaporation loss of soil moisture.

The specific method is to cover straw, straw and other substances in the canopy drip line to reduce water evaporation, and at the same time reduce and avoid weeds and fruit trees competing for fertilizer and water, and enhance the drought resistance of fruit trees.

3.Supplemental application of fast-acting top dressing.

Continuous high temperature weather will cause partial death of citrus roots, direct sunlight will cause fruit burns, if the lack of water will affect the normal growth of the tree, fruit and leaves, the orchard with severe drought will have leaves, fruits, branches will dry up, the tree will weaken, and pests and diseases are very easy to occur.

Therefore, the majority of fruit farmers and owners should apply a quick-acting top dressing after the end of the dry weather to promote the growth of roots and restore the tree's potential. At the same time, the occurrence of pests and diseases should be closely observed, and if signs are found, they must be dealt with immediately.

4.Clean up the drains.

When the temperature drops, the orchard drainage facilities should be quickly organized to clean up the orchard drainage facilities to ensure the smoothness of the field drainage ditch and the main ditch, to ensure that there is no water accumulation in the orchard field, and to avoid waterlogging after the orchard drought. Otherwise, it will cause a large number of fruit drops in the fruiting trees, which will affect the yield and efficiency of citrus.

Mandarin oranges are sweet because they are rich in polyphenols.

The taste of the mandarin orange is divided into sweet oil and non-sweet oil, the taste is sweet and sweet, the sour and astringent is not sweet mandarin, the more common mandarin is the red skin mandarin, the fruit surface is rough, and there are more brown flower skin phenomenon, for the formation of this phenomenon: one explanation is that the ripeness is related to the variety, and its roughness increases with the ripeness, and the other is the wind injury formed by the fruit in the wild state.

Mandarin orange

With the improvement of people's requirements for appearance, there are also neat and smooth varieties of citrus with a neat and smooth fruit surface, which is emerald green, shiny, and has no obvious flower skin, but in the taste side, I still think that the red skin is a little more delicious, a little sweeter, and the food is also diverse, with sugar pickling, fracturing with sour plum powder, and fried ginger shreds.

Mandarin orange, aliases: Shanyougan (Chaoshan), Wangguo (South Australia), Shanyougan, Tuyougan (Chaoyang), Shanyougan (Chao'an), Gangan (Chaoyang), Ganzi (Wuhua), Ganzi, Amla, Olive, Wangguo, Ganzi (Guangzhou), Ganzi (Huiyang), Revolution Fruit, Ganshu, Ganzi, Amla (Zhanjiang).

In some places, it is also called cow mandarin or ember, Euphorbiaceae, deciduous small tree, single-leafed, strip-oblong, alternate on very thin branches, di-column, broadly linear, oblong-elliptic. The fruit is fleshy, spherical, red yellow or light yellow when ripe, and can be eaten raw, and citrus leaves are often used to fill pillows, breathe and dissipate heat.

It depends on its variety, planting technology, management, soil and other ridges, those citrus planting areas, there will be special technicians and skilled personnel, Morino key to teach technology and experience, I don't know if you have special technical personnel there, you can go to consult!!

Sweetening and coloring is an extremely important process in the growth and development of citrus, which is related to the appearance quality and flavor quality of citrus, and directly affects consumers' desire to buy and the best of the fruit.

1. Improve lighting.

8 November is the period when light has the greatest impact on the quality of citrus fruits, and if the fruit trees do not have enough light at this time, it is easy to lead to low juice, low sugar content and poor color. Therefore, we should take improving the ventilation and light transmission conditions of fruit trees as the starting point, strengthen canopy management, and prune reasonably to achieve the purpose of promoting the sweetening and coloring of citrus. We must achieve "dense to thin, high to low", to ensure the formation of "independent trees, independent branches", that is, to appropriately adjust the distance between trees and between branches, so that they do not intersect and overlap.

The specific criterion is to maintain a distance of at least 30 to 40 cm between the two canopies, and the height of the canopy is not higher than the permeable meter. Fruit farmers who plant densely in the orchard can take the method of thinning or transplanting, and try to keep the plant row spacing at about 4*3 meters to avoid the orchard canopy.

2. Reasonable fertilization.

After citrus enters the flavor formation period, we should also pay attention to nitrogen control, phosphorus and potassium and medium and trace elements in fertilization. This is because nitrogen promotes vegetative growth in fruit trees and hinders the transfer of sugar to the fruit. Phosphorus can improve photosynthetic energy efficiency and promote fruit ripening, and potassium can increase fruit sugar accumulation and promote coloring. The trace element molybdenum can promote the synthesis of organic phosphorus-containing compounds in plants, participate in photosynthesis and respiration in the body, and promote fruit sweetening and coloring.

1. Increase calcium fertilizer 2, spray foliar fertilizer 3, and apply basal fertilizer early.

3. Water management.

During the expansion of citrus fruits, fruit trees often need a lot of water**, at this stage, fruit farmers must do a good job in the water management of the orchard, drainage after rain, watering during drought, and keeping the orchard soil moist at all times. Now in September, many citrus producing areas have rainy days, and everyone should pay attention to drainage and waterlogging in the orchard to avoid abnormal yellowing and fruit drop of citrus fruits.

When the fruit is ripe and ripe, the appropriate water stress is conducive to fruit coloring. Therefore, we should pay attention to keeping the soil in the orchard dry at this time to reduce the nitrogen uptake by the fruit trees. Because nitrogen will speed up the growth of fruit tree branches, the fruit will not be able to absorb enough nutrients to maintain its sweetening and coloring, which is a typical tip fruit contradiction.

In addition, scientific water control can also improve the soluble solids and sugar content in the fruit juice, and improve the quality of the fruit.

May everyone's efforts on the road to citrus cultivation be richly rewarded!

Citrus is a common fruit in life, because it is juicy and fleshy and has the effect of quenching thirst, cough and phlegm, people will plant one or two at home, but many people have questions about why citrus tastes sour when planting citrus.

1. The root system is damaged (rotting, burning, etc.), and it is unable to absorb nutrients normally. Nutrient deficiencies are not conducive to the reduction of acids and the increase of sugars. The circumcision is not completely healed, the nutrients cannot be transported properly, and the fruit tree does not die.

In the later stage, the nutrients are insufficient, the tree vitality is weak, and the fruit is colored early, but the taste is sour and astringent.

Note: Insufficient light, insufficient moisture from the coloring stage to the ripening stage, or high nitrogen fertilizer will result in low sugar content.

2. The application of organic fertilizer is less, which is not conducive to reducing acid and increasing sugar. The lack of potassium fertilizer during the fruit expansion period cannot reduce the acid well. The lack of phosphorus and potassium fertilizer in the coloring period is not conducive to the accumulation and coloring of sugar.

If the citrus grown is sour, it is usually summarized by me for several reasons. There are some sweet points that you can pay attention to when fertilizing, which are as follows:

For example, sugar oranges are buried in autumn fertilizer, and the average fruit yield per plant is 80kg. For example, per plant: 5 kg of commercial organic fertilizer or bacterial fertilizer or 10 kg of rotten farm fertilizer + 1 kg of peanut bran + kg of balanced compound fertilizer + trace elements in the weight of male fiber.

For example, by burying autumn fertilizers, the average fruit bearing capacity of fertile citrus is 80 kg per plant. Each plant: 8 kg of commercially available organic fertilizer or bacterial fertilizer or 20 kg of decomposed agricultural fertilizer + 1 kg of peanut bran + kg of balanced compound fertilizer + kg of medium and trace elements.

1. Balanced nutrition, reasonable fertilization Fertilization is the key to ensure the growth of fruits, fertilization should apply more organic fertilizer, compound fertilizer, reasonable collocation, achieve balanced nutrition, do not apply a certain element, to ensure that the supply of various nutrients is sufficient. For example, boron deficiency and zinc deficiency will lead to thick peel, calcium deficiency is prone to cracked fruits, sunburned fruits. Now it is also advocated to test the soil and formula fertilization, according to the needs of the orchard, what is lacking in cracked jujubes and what is supplemented.

2. Correct use of regulators -4D is widely used in citrus planting, which can play a role in preserving flowers and fruits, but if it is used too frequently or too concentrated, it is easy to have coarse skin and large fruits, so these hormone regulators need to be used correctly.

3. Disease and insect prevention Many pests and diseases will cause damage to the fruit surface, such as sand skin disease, canker disease, scab disease, bituminous coal disease, brown spot disease, red spider, scale insect insect, rust tick, etc., so the quality of pest control is also directly related to the quality of the fruit.

Different varieties, changes in the growing environment, improper fertilization, and incorrect picking time may all lead to unsweet citrus fruits.

First of all, different citrus varieties produce different degrees of sweetness, and inferior varieties will not produce sweet fruits no matter how they are planted. When planting citrus, it is necessary to choose the right core residue. Secondly, the sugar-acid content and sugar-acid ratio of citrus are the fundamental factors affecting the sweetness of the fruit, sugar and acid is a substance that gradually accumulates in the growth process of citrus, if there is a problem in the growth process, the fruit will not be sweet and sour.

For example, too much or too little precipitation can have an extreme impact on the fruit. If the water of the fruit tree is insufficient, it will not be able to grow normally, and the fruit will not be sweet due to the lack of water and sugar, and it will be very shriveled. If the amount of precipitation in the local area.

Too much, and not drained in time, the accumulated water will damage the root system of the fruit tree, the fruit nutrition is not natural and sweet, and in serious cases, it will also lead to the death of the dry and clumped trees.

Growers should water their trees as the weather changes when planting citrus, and manually when they are dry. If the rainfall is too heavy, you can dig drainage ditches to drain as much excess water as possible and ensure that the root system of the fruit tree is not damaged. In addition to the amount of water, light is also an important factor in marketing the sweetness of citrus fruits.

The sugar in citrus fruits is mainly used in the photosynthesis of leaves.

If the planting density is too high, it leads to a decrease in leaf photosynthesis. When planting fruit trees, it is necessary to arrange them reasonably to ensure that the leaves can carry out sufficient photosynthesis. At the same time, citrus fruit trees have dense branches and leaves after growth, and they need to be pruned frequently, so as not to block the sun and seize the nutrients of the fruit trees, resulting in insufficient nutrients and sweetness of the fruits.

Then, fertilization is also a very critical part of the citrus planting process. If you fertilize too much, it will result in a thick skin, uneven color distribution and low sugar content in the fruit. Only proper fertilization can replenish the nutrients of the fruit tree and ensure the sweetness of the fruit.

Finally, the fruit must not be picked until the citrus is fully ripe, and the wrong time to pick the fruit will also result in insufficient sugar accumulation, which will also cause the fruit to not be sweet.

Sugar accumulation, organic acids, sugar-acid ratio, soil conditions, fertilization during growth, citrus varieties, these are all relevant factors.

It may be caused by a lack of fertilizer, or it may be caused by insufficient sunlight exposure time, poor development, or disease, or it may be caused by the lack of rapid and solid management of the fruit.

It may be due to insufficient sunlight or lack of regular fertilization and watering, the surrounding environment is not suitable for citrus growth, the management of water is weak, and the calcium content in the soil is relatively low.

It may be that there is not enough light time, it may be a lack of photosynthesis, or it may be that the fertility of the soil is not enough, there is a lack of organic fertilizer, or it may be that the planting is too dense.

Summary. The reason for the sweetness is because the orange is rich in polyphenols. When polyphenols combine with proteins in the mouth, they form an impermeable film, which causes the oral muscles to contract and tighten, resulting in astringency. After a period of time, this layer of film gradually ruptures, the oral muscles recover, and the effect of rejuvenation appears.

The original reason for the sweetness is that the orange is rich in polyphenols. When polyphenols combine with proteins in the mouth, they form an impermeable film, which causes the oral muscles to contract and tighten, resulting in astringency. After a period of time, this layer of film gradually ruptures, the oral muscles are restored, and the effect of being healthy and sweet.

It is drought-tolerant, barren, adaptable, and can grow normally in sandy loam, shallow and barren mountain tops or cracked mountainsides, but it grows better in acidic red soil with deep soil layer. Mandarin orange likes pure knowledge and closed light and temperature, and is more shade-tolerant in the young stage, so it grows well in Mengxin sparse forest.

I mean, the pomelo orange is very sweet now.

Eat. The reason for the sweet empty is because the orange is rich in polyphenols. After the polyphenols are combined with the disgusting proteins in the mouth, they will form an impermeable film, so the oral muscles will shrink and tighten, resulting in astringency; After a period of time, this layer of film gradually ruptures, the oral muscles recover, and the effect of rejuvenation appears.