There are two reasons for reasonable pruning of potted lemons. First, the pot is small, the soil is small, and the nutrients provided are limited, which can not meet the needs of lemon growth and must be pruned; Second, through pruning, the rational distribution of nutrients in the tree can be adjusted, so that limited nutrients can be supplied to buds and leaves to form more fruiting branches, thus achieving full flowering and fruiting branches. The new shoots of potted lemons must be pruned intensively before they germinate. First of all, we should remove dead branches, diseased branches, clustered branches, inward branches, cross branches and sprouting branches. Weakly cut strong branches, leaving 4 or 5 full buds; Strong pruning of weak branches leaves 2 or 3 buds, so that each branch can grow stronger spring shoots. After the spring shoots are fully grown, in order to control their imaginary length, they can be lightly cut and 3 or 4 branches can be cut off. When the new shoots grow to 6 ~ 8 knots, it is necessary to remove the heart to induce more summer shoots.
In order to prevent the summer shoots from growing too vigorously, and at the same time, trees should accumulate nutrients and promote the formation of buds, potted lemons should be "watered" before entering summer. The specific method is to gradually reduce the water supply to potted lemons more than ten days before the summer heat; In the first 5 days, the water was stopped, the basin soil was exposed to the sun, a lot of water evaporated, and the basin soil was dry; Due to the lack of water in roots, branches and leaves lose water, and leaves wither and curl. In order to prevent the leaves from dehydration, water can be sprayed on the leaves in the morning and evening, and a small amount of water can be sprayed on the pot soil at the same time, so that the axillary buds of lemon will expand day by day under the condition of drought and not dying, and the color of the buds will turn from green to white. When most axillary buds turn from green to white, "withholding water" will succeed in promoting flowers. At this time, the water supply of potted lemons should be restored in time.
After the lemon blooms, in addition to applying thin fertilizer once a week, it is also necessary to dilute the flowers and fruits. Sparse some buds before bloom; After the flowers wither and set fruit, some young fruits in inappropriate positions should be thinned out to reduce the consumption of nutrients, so that the limited nutrients can be concentrated on the preserved flowers and fruits, and the fruits can grow bigger and better. In the process of fruit growth, if the fertilizer and water are sufficient and the plants are nutritious, some branches will sprout new buds, and the growth of new buds will inevitably divert some nutrients, which will affect the growth of fruits. In order to protect the fruit, the new buds should be smoothed in time. When the fruit turns yellow, stop fertilizing, reduce watering and keep the soil moist and slightly dry. If we continue to give too much fertilizer and water, the fruit will ripen and fall early, shortening the viewing time.
Reasonable fertilization Lemons like fertilizers, and usually apply more thin fertilizers. Apply decomposed liquid fertilizer once before the plants germinate, and then apply liquid fertilizer mainly containing nitrogen every 7 ~ 10 days to promote more branches and leaves and more spring shoots. Fertilize in time after each coring to promote the early maturity of branches. In the process of lemon growth, you can sprinkle some cake fertilizer on the basin surface, so that some fertilizer penetrates into the soil every time you water it, which can enhance fertility. After autumn, fertilization will be reduced, plant nutrition will be avoided, autumn shoots will be promoted, and fruits will compete for nutrients, leading to fruit drop.
Due to the lack of potted soil, the nutritional supply of potted lemons is limited. After years of lack of soil fertility, lemons will weaken year by year, with fewer flowers and fewer fruits. In order to keep the lemon blossom and bear fruit every year, it is necessary to turn over the pot. The best turning time is half a month before lemon germination. Before turning over the pot, prepare a pot that is one size larger than the original pot, take the lemon out of the pot, and don't break the mud. Cut off the topsoil with a thickness of 1 and 2 cm along the mud mass, cut off the dead roots and rotten roots, cut off the soil with a thickness of 1cm at the bottom of the mud mass, and take out the tiles embedded in the bottom of the original pot. The drainage holes of the new pool are laid with tiles. First, lay a drainage layer with a thickness of 2 or 3 cm, and then lay a layer of nutrient-rich culture soil with a thickness of 4 or 5 cm, which is mixed with a small amount of calcium superphosphate. Then put the lemon mud balls into the pot, fill the culture soil around the mouth of the pot, slightly compact the pot soil, water the roots, put it in a ventilated and semi-cool place, and put it back in place for daily management after one week.
Question 2: When will potted lemons bloom? Potted lemons are the same as lemons grown on the ground. They all bloom from April to May, and the flowering time will be earlier in hotter areas and later in colder areas.
Question 3: How do potted lemon trees blossom and bear more fruits? 1. Change pots and soil: You must turn pots and soil in March and April in spring. If the flowerpot is too small, you can change it to a suitable flowerpot. If the flowerpot is still suitable, the original flowerpot can be replaced with new soil, and the base fertilizer should be applied when changing the soil.
Second, spring pruning: spring pruning is combined with changing pots in spring, and internal branches, dead branches, root leaves of pests and diseases, and redundant branches are cut off to facilitate plant fruiting.
3. Rational fertilization: Lemon plants should be topdressing many times before flowering and after fruiting, applying multi-element flower fertilizer once a month and spraying flower nutrient solution once every half month to ensure that the fruits are not easy to fall off and have bright colors.
Fourth, prevent defoliation: defoliation affects the fruit of lemon. In order to avoid falling leaves, in daily management, avoid watering more and watering less.
5. Shading at noon: When the temperature exceeds 30℃ at noon, it should be shaded for about 3 hours, otherwise it will affect the normal flower shape and hinder the plant from bearing fruit.
6. Artificial pollination: Artificial pollination is an important measure for multiple fruits. It is best to pollinate the petals in time after they grow. This work is carried out at around 9: 00 every morning, and the effect is good.
Seven, pest control: summer and autumn are the seasons with frequent pests and diseases, so it is necessary to do a good job of prevention and control. Pest control is more important than cure, and anthers are sprayed every half month, about 9 am and 4 pm. It is not advisable to spray in the hot sun at noon to prevent phytotoxicity.
Eight, focus on fruit protection: after fruit setting, according to the size of the plant, leave a few or dozens of fruits without pests and diseases, pick the rest, and pick the residual flowers as you see them, so that the nutrients are concentrated in the young fruits.
Nine, the correct wintering: throughout the winter, potted lemons should be placed in the environment of 5℃ to 10℃, and the plants should receive enough light every day, and the water should be controlled at ordinary times. Potted soil is often in a slightly dry state to avoid root rot and lay a good foundation for the results.
Question 4: Why can't potted lemons blossom and bear fruit? Potted lemons, if not properly managed, often only bloom without fruit, or rarely bear fruit, or even do not bloom. In order to make lemon blossom and bear fruit every year, scientific management must be carried out in water, fertilizer and pruning to achieve fruitful results. The main links of management are as follows:
Reasonable pruning:
There are two reasons for pruning potted lemons: 1, and the pot soil is small and the nutrients are limited, which cannot meet the growth needs of lemons and must be pruned. 2. Adjust the rational distribution of nutrients in the tree body through shaping and pruning, so that limited nutrients can be supplied to the buds and branches of the tree, forming fruiting branches and promoting the fruit to be full of branches. Before the spring shoots of potted lemons germinate, they must be pruned, such as dead branches, diseased branches, horizontal branches, inner branches and long branches. And weak branches (strong branches), leaving 4-5 complete axillary buds; Strong cutting weak branches, leaving 2-3 buds, to promote each branch to sprout strong spring shoots. After the spring shoots are fully grown, in order to control their excessive growth, they can be lightly pruned and cut off 3-4 branches. When the new shoots grow to 6-8 knots, they will be cored to induce more summer shoots.
Keep moisture before flowering:
In order to prevent excessive growth of summer shoots, accumulate nutrients for trees and promote the formation of flower buds, water control should be implemented for lemons before summer. The specific method is: gradually reduce the amount of lemon watering more than ten days before the summer heat, and stop the water supply five days before the summer heat. In order to prevent the dehydration of branches and leaves, it is necessary to spray the plant surface and pot soil frequently to keep the lemon in a dry state, which will make the axillary buds expand day by day and turn the color from green to white. When most axillary buds turn from green to white, it means that "withholding water to promote flowers" is successful and water supply should be resumed immediately.
Protect flowers and fruits:
After the lemon blooms, in addition to applying dilute liquid fertilizer once a week, the flowers and fruits should also be diluted. When the flowers are not in full bloom, some buds should be thinned to make the flowers wither and set fruit, and then some weak fruits should be thinned to reduce the consumption of nutrition, so that nutrition can be concentrated on the preserved flowers and fruits, and the fruits can grow strong and fat. In the process of fruit growth, if the fertilizer and water are sufficient and the plants are in a good nutritional state, some branches will sprout new buds, and the growth of new buds will divert some nutrients, which will affect the growth of fruits. In order to ensure the quality of the fruit, these new shoots should be cut off in time. After the fruit turns yellow, stop fertilizing, reduce watering times and keep the soil slightly wet. At this time, too much water and fertilizer will only cause premature fruit drop.
Rational fertilization:
Lemons like fat, so we should apply more dilute liquid fertilizer. Before germination, irrigate the decomposed liquid fertilizer once, and then irrigate the thin fertilizer water with nitrogen fertilizer as the main component every 7- 10 days to promote the plants to grow more branches and leaves and spring shoots. Fertilize in time after each coring to promote the early maturity of branches. During the growth of lemon, you can sprinkle some cake fertilizer on the basin surface, so that the fertilizer can penetrate into the soil with water and enhance fertility. Fertilization should be reduced after autumn to prevent plants from sprouting autumn shoots and competing with fruits for nutrition, which will lead to the decline of fruit quality and fruit drop.
Turn over the pots and change the soil:
Potted plants, because of less soil and limited nutrition, are easy to cause plants to weaken year by year, and reduce flowers and fruits due to insufficient fertility. In order to ensure more flowers and fruits every year, it is necessary to turn over the pots and change the soil. The best time to turn over the pot is half a month before the lemon germinates in spring, and the lemon will be put back on the pot in combination with pruning rotten roots and replacing new nutrient soil.
Daily management of lemons;
1, change pots and soil: potted lemons must be changed pots and soil from March to April every year, and base fertilizer (both cake fertilizer and manure can be used) should be added;
2. Spring pruning: pruning by changing pots, cutting off dead branches, old and weak branches and overlapping branches. , in order to facilitate the flowering and fruiting of plants;
3. Fertilization: Lemons should be fertilized several times before flowering and after fruiting, mainly decomposed organic fertilizer. Spray 1000 times of urea and potassium dihydrogen phosphate aqueous solution once every half month to ensure that the fruit does not fall off and the color is bright;
4. Prevent falling leaves: Falling leaves will affect the fruits of lemons. In order to avoid defoliation, daily attention should be paid to avoiding the sharp rise and fall of temperature, frequent watering and watering with alkaline water (lemon belongs to acid-loving flowers, and the PH value of water is required to be 6.0-6.5. If the soil and water are too alkaline, the leaves will turn yellow and fall off easily).
5. Shading at noon: When the temperature is higher than 30℃ at noon, it should be shaded in time, otherwise it will affect the normal flowering and fruiting;
6. Artificial pollination: Artificial pollination is an important measure for lemon to bear more fruits. Pollination should be carried out in time after the petals are opened, and the best operation effect is around 9 am every day;
7. Pests and diseases: There are many pests and diseases in summer and autumn, and prevention is more important than cure. Pesticides and fungicides shall be sprayed once every half month, and the pesticide concentration shall not exceed the standard. It is forbidden to spray at noon to avoid drug damage. ...& gt& gt
Question 5: When do lemons bloom? In what season do they bear fruit? Flowers bloom all year round, 3-4 times a year.
Lemon (lemon)
Lemon is a shrub with small trees or branches of Rutaceae. The scientific name of lemon (Citrus limon (L.) Burm.f) is also called lemon fruit, foreign lemon and beneficial mother fruit. Because of its sour taste, pregnant women with insufficient liver qi like to eat it best, so it is called beneficial mother fruit or beneficial mother and child.
Lemon is a small evergreen tree of Rutaceae and Citrus. Whether it originated in the southwest of China and Myanmar, or in the eastern part of the southern foothills of the Himalayas, is still inconclusive. Now the main producers are Italy, Greece, Spain and the United States. This kind of tree is more open, with many needles on its branchlets, and its tender tips are often purple. Petiole short, wings inconspicuous. White with purple, slightly fragrant, solitary or 3 ~ 6 flowers in racemes. Citrus fruit is yellow and shiny, oval or obovate, with * * * * shaped protrusions at the top, large oil cells and obvious depressions, and the peel is not easy to peel off, with sour taste, and the pulp petals are 8 ~ 12, which is not easy to separate. The seeds are ovoid, and most of them are single embryos. There are dozens of cultivated varieties, mainly Eureka and Lisbon. Lemon is one of the least cold-tolerant citrus varieties. Suitable for places where it is warmer in winter, not too hot in summer and the temperature is relatively stable. Cutting propagation is very easy to survive, but grafting is often used in production, with rough lemon (a hybrid of lemon) with developed root system as the rootstock. Suitable for planting on warm gentle slopes with deep soil layer and good drainage. It blooms all year round and is open 3 ~ 4 times a year. Fruit is rich in vitamin C and citric acid. There are lemon oil with special fragrance and vitamin P in the oil cells of the peel, which are harvested after full growth and do not turn yellow, and then ripened with ethylene to make the peel turn yellow. It is resistant to storage and transportation. Besides fresh food, you can also make various drinks and extract lemon oil. There is little cultivation in China, and there is a kind of "Beijing Lemon" in the north. The top of the fruit has no * * * * like protuberance, and it is neither sour nor fragrant, so it is only potted for viewing.
Untrimmed lemon plants can be as high as 3 to 6 meters. The young leaves are obviously red and then gradually turn green. Some varieties have angular young branches; Some varieties have spikes between leaf axils. Flowers are large, fragrant, solitary or clustered; The bud is reddish, the petals are white and purple, which can be used to make drinks, contain vitamin P and extract lemon oil. The fruit is ovoid with a wide and short * *-shaped protrusion at the top; 8 to 10 disc; It is yellow when it is ripe. Some varieties have thick exocarp, white mesocarp, spongy and almost tasteless, which are the main sources of commercial pectin. Seeds are small, ovoid and pointed; Occasionally seedless. The pulp tastes very sour. The main acid is citric acid, accounting for more than 5% of the total fruit juice. Lemon juice is rich in vitamin C and contains a small amount of vitamin B. After the Crusaders discovered lemons in Palestine, lemons began to spread all over Europe. At present, the cultivation of lemon trees in most tropical and subtropical regions is limited. Commercial lemon trees are usually propagated by budding, and the coastal areas of Italy and California are most suitable for growing lemons. Generally planted in orchards, the spacing between plants is 5 to 8 meters. Generally, flowers bloom all year round, and fruits are harvested 6 to 10 times a year. Mature commercial fruit is about 5 cm in diameter. Fruits are generally harvested before ripening and can be preserved for 3 months after treatment. Fruiting begins in the third year after planting and reaches commercial fruit in five years. The average annual output of each tree is 1500. Because lemons are easy to bruise, wear gloves when picking them.
Anyue County, ziyang, Sichuan Province is the only lemon commodity production base county in China and the hometown of lemons in China. Eureka is the main cultivated variety, which was introduced from the United States in the 1920s. After more than 70 years of cultivation and breeding, a new strain with early fruiting, high yield and high quality has been cultivated. The quality of Anyue lemon fruit and its lemon oil is better than that of the main lemon producing countries in the world, such as the United States and Italy, as determined by China Citrus Research Institute for three consecutive years. Won the title of national and provincial high-quality fruit for many times, and 1993 won the gold medal of Thailand high-quality fruit Expo. Anyue county began to build a lemon commodity production base from 1986. Through hard work, 18 townships have been built and 8 million lemons have been planted. In 2000, it produced 32,000 tons of lemons. At present, the annual output of fresh fruits reaches150,000 tons. By 20 10, the planting area of Anyue lemon will reach 200,000 mu, with an annual output of more than 250,000 tons of fresh fruit. Anyue Hongyi Agricultural Development Company invested 20,000 mu to build a national standardized lemon production base. Both the base and fresh lemon fruits have passed the strict inspection by the national import and export inspection and quarantine department and obtained the right to operate independently. It laid a quality foundation for Anyue lemon to go global. Lemon is gradually becoming a green pillar industry in Anyue County. Products are exported to more than ten countries and regions such as Russia, Kazakhstan, Hong Kong, Macao and more than twenty large and medium-sized cities in China. Its output, scale and market share account for more than 70% of the country.
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Question 6: When will the lemon tree blossom? Generally, flowers bloom all year round, and fruits are harvested 6 to 10 times a year. Mature commercial fruit is about 5 cm in diameter. Fruits are generally harvested before ripening and can be preserved for 3 months after treatment. Fruit began to bear in the third year after planting, and commercial fruit was achieved after years of cultivation. The average annual output of each tree is 1500.
Question 7: When will the lemon tree blossom? Lemon has many advantages. It blooms all its life, bearing green fruits and mature fruits, which is different from other kinds of fruit trees. Other kinds of fruit trees only bloom and bear fruit once a year, but lemons are tireless all year round, happily and vigorously covered with fragrant green clothes and thorns.
Question 8: What kinds of lemons blossom and bear fruit all year round? If the light and temperature are suitable, most kinds of lemons can blossom and bear fruit all year round. I am in Shandong, a pot of Eureka. Last autumn and winter, flowers bloomed because of the heating.
Question 9: When potted lemons are bought back, many flowers will bloom in a few days, but as long as the pot soil is not completely dry and the leaves are not wilting, it is not the reason for watering. Fruit trees need a lot of trace elements to blossom and bear fruit, and most of the flowers bought from the market are watered with nutrient solution. Once you buy it home, stop pouring nutrient solution, and there will be malnutrition such as yellow leaves. Another possibility is that most of the flowers sold in the past are raised in greenhouses, which are hot and stuffy, and the air humidity when bought home is too low, which is easy to fall off. You can buy some liquid nutrient solution from the flower market, or use compound fertilizer, dilute it 500 times with clear water and water it once every 20 days. Then pinch off the flowers to reduce the nutritional consumption of lemons. Pad the bottom of the flowerpot, and don't touch the ground directly. Also, look at the photos you took. There is no sunshine, so you need to put them on the balcony where you can get sunshine for a long time.
Question 10: How long did the lemon tree last today? Therefore, lemons like light and are drought-tolerant. It is best to put potted plants in a bright place on the balcony. It is best to dry it thoroughly and then water it. It is best to keep warm if you are afraid of waterlogging and freezing in winter, and the temperature can be controlled at around 20℃. It is better to add some potassium dihydrogen phosphate when watering, and it will have an effect in a month or two.