Why do orchids generally love to adjust their leaves? be
Milan likes a ventilated, humid, warm and sunny environment. Milan, which went public in the spring, was mostly transported from the south to the north. The climate difference between the two places is very big, which poses a great threat to Milan's survival. Especially in early spring, even locally cultivated varieties, if not properly managed, will lead to a large number of defoliation and even death, not to mention exotic varieties. Here are the common causes, preventive methods and maintenance skills of deciduous leaves in Milan for your reference:
Milan is afraid of cold. Once it gets cold, a lot of leaves will suddenly fall off in a short time. In the process of indoor maintenance, if it is cold, leaves often appear. Therefore, we must keep out the wind and cold in spring.
In Milan, under the condition of low room temperature and insufficient light for a long time, roots and leaves were damaged due to excessive watering, so that green leaves fell off. Milan, which has fallen leaves, should immediately stop watering, spraying water and topdressing, and adopt methods such as "loosening soil to disperse moisture" and "changing soil to absorb moisture". And put it in warm sunshine, water it after the soil is dry and loose, and gradually moisten it until it slowly recovers.
Third, Milan is prone to lose many leaves in winter. From the physical signs, the dark brown wilting of leaves is a symbol of freezing, so it should be heated in time or moved to a warmer place to gradually recover. Dead leaves are caused by poor ventilation or too dry soil. Green leaves fall off because the soil is too wet. In winter, Milan's physiological activities are weak, so it is forbidden to have low temperature, high humidity or dry air. Continuous low temperature below 5℃, aisle wind and insufficient illumination for a long time can also cause defoliation.
In April, the cold wind blows straight, and the leaves fall easily. When the temperature is stable after Qingming, you can go out again, which is good for protecting the leaves.
Five fertilizer damage Improper fertilization will cause fertilizer damage and defoliation. Fertilizer must be fully fermented and decomposed. If raw fertilizer is applied at home, Milan will not grow vigorously, but will be burned by the heat generated during the fermentation of raw fertilizer. If inorganic fertilizer is applied, the leaves will fall off after root injury because of too much fertilization at one time or direct contact with chemical fertilizer.
In order to prevent Milan from falling leaves, in addition to applying more organic fertilizer to meet its moisture, temperature, pH, light and other conditions, there are two points that need special attention.
1 cap
The purpose of topping is to promote its multi-branching, control its overgrowth and prevent the leafy part from moving up. It is necessary to master the height of branches when planting Milan for the first time, and 15 ~ 20 cm is suitable for potted plants. In the first year, pay attention to removing the top that is growing too fast. Milan, born 2 ~ 3 years old, is a critical period of plastic surgery, and needs to focus on full crown modeling. When the growth of abundant branches is unbalanced, the strong branches should be thinned out. Some side branches and the remaining side branches should be hung with ropes to control their growth. Weak ones should be cored or truncated to promote their branching. The topping in Milan should be carried out in spring, and the overgrown branches should be topped, leaving branches half shorter than the adjacent side branches. This can maintain a certain crown shape for a long time, with branches up? ぁ?
Sparse bud
The purpose of bud thinning is to mediate the competition for nutrients between the growth of vegetative organs and the formation of flowers. Milan is a flower with vigorous flowering and strong nutritional demand. Flowers belong to reproductive organs, and their formation and growth require much more nutrients than the growth of vegetative organs, and plants themselves have the characteristic of giving priority to the nutrients needed by reproductive organs. Milan has a large number of flowers, many flowering times and strict demand for nutrients, which is also one of the main reasons for the lower leaves falling off. To solve this problem, it is necessary to remove 1/2 or 2/3 when the inflorescence is just formed. As long as we strengthen the management of the remaining flowers and give them enough light and temperature, the flowers are still fragrant and refreshing.
Answer time of orange astringency 2007-09-03 12:36
Another answer may be the cold weather.
Answer time: 2007-09-03 12:35
Ah, yes, but there is hardly any water.
Answer time of star tears 2007-09-03 12:40
Milan likes a ventilated, humid, warm and sunny environment. Milan, which went public in the spring, was mostly transported from the south to the north. The climate difference between the two places is very big, which poses a great threat to Milan's survival. Especially in early spring, even locally cultivated varieties, if not properly managed, will lead to a large number of defoliation and even death, not to mention exotic varieties. Here are the common causes, preventive methods and maintenance skills of deciduous leaves in Milan for your reference:
Milan is afraid of cold. Once it gets cold, a lot of leaves will suddenly fall off in a short time. In the process of indoor maintenance, if it is cold, leaves often appear. Therefore, we must keep out the wind and cold in spring.
In Milan, under the condition of low room temperature and insufficient light for a long time, roots and leaves were damaged due to excessive watering, so that green leaves fell off. Milan, which has fallen leaves, should immediately stop watering, spraying water and topdressing, and adopt methods such as "loosening soil to disperse moisture" and "changing soil to absorb moisture". And put it in warm sunshine, water it after the soil is dry and loose, and gradually moisten it until it slowly recovers.
Third, Milan is prone to lose many leaves in winter. From the physical signs, the dark brown wilting of leaves is a symbol of freezing, so it should be heated in time or moved to a warmer place to gradually recover. Dead leaves are caused by poor ventilation or too dry soil. Green leaves fall off because the soil is too wet. In winter, Milan's physiological activities are weak, so it is forbidden to have low temperature, high humidity or dry air. Continuous low temperature below 5℃, aisle wind and insufficient illumination for a long time can also cause defoliation.
In April, the cold wind blows straight, and the leaves fall easily. When the temperature is stable after Qingming, you can go out again, which is good for protecting the leaves.
Five fertilizer damage Improper fertilization will cause fertilizer damage and defoliation. Fertilizer must be fully fermented and decomposed. If raw fertilizer is applied at home, Milan will not grow vigorously, but will be burned by the heat generated during the fermentation of raw fertilizer. If inorganic fertilizer is applied, the leaves will fall off after root injury because of too much fertilization at one time or direct contact with chemical fertilizer.
In order to prevent Milan from falling leaves, in addition to applying more organic fertilizer to meet its moisture, temperature, pH, light and other conditions, there are two points that need special attention.
1 cap
The purpose of topping is to promote its multi-branching, control its overgrowth and prevent the leafy part from moving up. It is necessary to master the height of branches when planting Milan for the first time, and 15 ~ 20 cm is suitable for potted plants. In the first year, pay attention to removing the top that is growing too fast. Milan, born 2 ~ 3 years old, is a critical period of plastic surgery, and needs to focus on full crown modeling. When the growth of abundant branches is unbalanced, the strong branches should be thinned out. Some side branches and the remaining side branches should be hung with ropes to control their growth. Weak ones should be cored or truncated to promote their branching. The topping in Milan should be carried out in spring, and the overgrown branches should be topped, leaving branches half shorter than the adjacent side branches. This can maintain a certain crown shape for a long time, with branches up? ぁ?
Sparse bud
The purpose of bud thinning is to mediate the competition for nutrients between the growth of vegetative organs and the formation of flowers. Milan is a flower with vigorous flowering and strong nutritional demand. Flowers belong to reproductive organs, and their formation and growth require much more nutrients than the growth of vegetative organs, and plants themselves have the characteristic of giving priority to the nutrients needed by reproductive organs. Milan has a large number of flowers, many flowering times and strict demand for nutrients, which is also one of the main reasons for the lower leaves falling off. To solve this problem, it is necessary to remove 1/2 or 2/3 when the inflorescence is just formed. As long as we strengthen the management of the remaining flowers and give them enough light and temperature, the flowers are still fragrant and refreshing.
Rice orchids do not grow. What are the chubby rice orchids on the leaves?
Fertilize 1 time every 2 weeks after leaves, but the watering amount must be controlled and not too wet. In midsummer, in addition to shading the sun at noon, we should also see more sunshine, so that Milan not only blooms many times, but also has a strong fragrance. Winter maintenance in the area north of the Yangtze River must be moved indoors.
Milan likes humidity, so water it properly during the growing period. Too much watering can easily lead to rotten roots and yellow leaves falling off; Too much watering during flowering period is easy to cause falling flowers and buds; Too little watering will cause leaves to dry up and buds to wither. Therefore, when the temperature is high in summer, in addition to watering 1 ~ 2 times a day, we should often spray branches and leaves with clear water and sprinkle water on the ground to improve the air humidity. At the same time, fertilization should be appropriate. Because Milan has a large number of flowers a year, it is necessary to topdressing 2 ~ 3 times of fully decomposed dilute liquid fertilizer in time after each flower, so as to make bloom endless and full of fragrance. Milan likes acidic soil, and humus-based culture soil should be used for potted plants. In the vigorous growth period, spraying 0.2% ferrous sulfate solution once a week will make the leaves turn green and the flowers multiply.
Loose, well-drained and breathable soil for potted plants. 65438+ change pots every 0 ~ 2 years, and 65438+ fertilize every 0 ~ 2 weeks.
Planting in many gardens in the south; Potted plants in the north should be planted in outdoor places where the sun can shine directly in spring, summer and autumn. In winter, it will be moved to a place with direct sunlight indoors, and the overwintering temperature will be above 10℃.
After flowering, the adult mother plant will bear oval small red fruit, like bitter tree fruit. When the fruit is reddish brown, pick it, soak it in warm water, peel off the fleshy peel, then sow the seeds in a sand basin with the harvest, and germinate in summer and autumn for about one month. It takes two or three years for the seedlings to blossom, unlike the seedlings propagated by high-altitude layering, which can be full of strange fragrance that year.
Rational fertilization. Milan orchids have strong flowering ability and many flowering times, so they must be supplemented with nutrition in time. Every time orchids bloom, they should pay close attention to supplementing nutrition. Lack of fertilizer is the main reason why orchids only grow leaves and do not bloom or fall. Therefore, when the temperature rises, orchids should be moved outdoors for maintenance. After a week, they should loosen the soil, apply some dilute nitrogen fertilizer, fertilize water or human feces with 10% to 20% decomposed cakes, and then apply liquid fertilizer every 10 day to promote the growth of their branches and leaves. From June, orchids entered the vigorous growth period and flowering period, until the middle of 10. It is necessary to apply concentrated fertilizer mainly containing phosphate fertilizer every 15 days, or spray 0.3% potassium dihydrogen phosphate solution every 15 to 20 days, so that the flowers will flourish more. It is particularly important to note that the flowering period must be dominated by phosphate fertilizer, otherwise it will only grow leaves and not bloom. During the flowering period from June to 10, if fertilization is insufficient, not only will the flowering times be reduced, but also the flowers will not be fragrant, and the buds that have already appeared will wither and fail to bloom.
Growth habit
Like warm, humid and sunny environment, not cold-resistant, slightly shade-tolerant. Loose and fertile slightly acidic soil is the best, and the temperature in winter is not lower than 10℃. Often found in sparse forests or bushes in low-altitude mountainous areas.
Milan likes warmth, sunshine and fatness. The optimum growth temperature is 20℃ ~ 25℃. Under normal circumstances, when the sunshine is sufficient and the temperature is high (about 30℃), the flowers will have a strong fragrance. If it is placed in the shade in summer and a large amount of nitrogen fertilizer is applied at the same time, it is one of the main reasons why Milan does not bloom or blooms less and its fragrance is weak. Therefore, during the growth and development of Milan, it is necessary to maintain it in a sunny place outdoors, and pay attention to the appropriate application of liquid fertilizer containing more phosphorus. It is best to use rotten alum water such as broken bones, fish bones, chicken bones, etc., and often add some fertilizers containing more phosphorus or fermented rice washing water, which is helpful for budding, flowering, golden color and fragrant smell.
Michelia likes warm, humid, sunny environment, not cold-tolerant, slightly shade-tolerant, and the suitable growth temperature is 20℃ ~ 25℃. Moreover, loose and fertile slightly acidic soil should be the best soil for planting Michelia, and the winter temperature should not be lower than 10℃.
Nutrient medium
Why do the leaves fall in Milan? Milan is a subtropical tree species, which is produced in Fujian, Guangdong, Sichuan, Yunnan and Southeast Asia. I like a mild and humid climate.
Because Milan is a southern plant, it is difficult to cultivate it indoors. Need careful maintenance. Your Milan leaves have fallen off, which may be caused by many reasons, such as the pH of soil, the pH of water and the problem of fertilizer. Some technical points of aquaculture in Milan are hereby notified as follows:
Milan grows more peat, rotten leaves and sandy soil in the north. Families can use (old) Clivia soil and plain sand to cultivate soil. The basin should not be too big, and alkaline fertilizer should not be added to the soil. The bottom of the basin should be padded with drainage layer. After planting, put the seedlings in the shade for maintenance. When the sky is dry
Spray water on leaves and surrounding ground every day to keep the environment moist. After the new leaves grow, they will move to the shade, and then gradually adapt to the strong light, and the flowers will be more fragrant. Potted flower seedlings in spring should be topdressing before and after the arrival of beginning of autumn, especially rare organic liquid fertilizer. From the second year, during the growing season,
Topdressing organic liquid fertilizer every 20 days. If it can be applied alternately with the mixed solution of 0. 1% urea and 0.2% potassium dihydrogen phosphate, the flowers and leaves will flourish more. Pot soil should always be moist, and it should not leak because of drought, but it should not be moist for a long time. If it is placed indoors, it should be ventilated 15 days or so.
Rotate outward. When you are indoors in winter, you need to see enough sunshine, and the lowest indoor temperature should not be lower than 8℃. Control water and prohibit fertilizer, pay attention to the door and window switches to avoid direct cold air blowing and smoke pollution. Scale insects and the prevention of sooty blotch. In North China, after the dry wind from late April to early May, it will move outdoors.
Guard. Milan can change pots every two years.
Milan should start pruning and shaping from the seedlings, leaving a section of trunk with a height of 15cm to 20cm. Don't let the main branches grow out of the soil, but prune them at the height of 15cm above the main branches to make the plants plump. The lower branches of perennial plants often age and die. Therefore, the north is suitable.
Cut it once every other year in high temperature season, to promote the germination of adventitious buds at the lower part of the main branch, grow new lateral branches, keep the posture of the tree symmetrical, keep the tree strong and have lush leaves.
Why did Milan suddenly fall leaves all over the floor? How did Milan finally stay barefoot? It is because of excessive watering, insufficient light, cold wind blowing, low-temperature water spraying or short-term cold damage below 5℃, which leads to a large number of green leaves falling off. Therefore, Milan's measures to prevent leg exposure are to prevent green leaves from falling. If bare legs occur in Milan, comprehensive measures should be taken to remedy the leaf protection problem that promotes the lower new technology. If you train well, you can achieve great results in one year.
(1) Pinch the heart to promote new branches. Before the root tip grows in spring, according to the requirements of plastic surgery, most of the upper root tip is pinched off. This can limit the high growth and promote the occurrence of new quilts in the lower part. In the future, appropriate adjustments should be made according to the situation of new branches. 1 year Don't prune branches with leaves, lest the leaves continue to decrease.
(2) There is plenty of sunshine to prevent occlusion. Milan loves sunshine, so we should see as much sunshine as possible in any season. Even in midsummer, in order to prevent the direct sunlight around noon from inhibiting its growth, it is best to put it on the edge of the shade shed or move it indoors for temporary shelter during the period of 165438+ 0: 00 am to 3: 00 pm. During the period of flowering and fragrance release, it can only be placed indoors for a period of time around noon.
(3) Strictly prevent frostbite. Milan prefers warmth to cold. You can leave the house after Tomb-Sweeping Day in spring and enter the house as soon as possible before the first frost in autumn. After leaving the room, before entering the room, in case of sudden cooling or the temperature may drop below 15℃ at night, you should move indoors to avoid the cold in time. Beware of the cold wind in cold season. Water spraying or watering in winter should be carried out at noon when the weather is sunny and warm, and warm water should be used to prevent freezing injury caused by excessive cooling.
Why do Milan flowers have yellow leaves? How to maintain Milan orchids? Generally, it is often watered frequently and the humidity is high. It is best to put it in a bright and ventilated place on the balcony. They like light and drought-tolerant plants, drought-tolerant. It's best to dry the soil. Always spray water on leaves and branches and add some nutrient solution to make the leaves brighter and greener.
Why do orchids lose their leaves when they bloom? Many leaves have fallen off, lack of sunshine and too much watering. This is the case.
Why smiling leaves fall, Milan's conservation methods, Milan's conservation methods.
There are many reasons for changing pots and leaves in Milan, and the control check is: 1~ changing pots in growth period; 2~ lack of nutrients, weak plants; 3~ Milan's roots were damaged when changing pots; 4~ Plants need to go through the "upper pot period" after changing pots, and under the action of air, water and photosynthesis, they will grow a new round of roots.