What should I do if the leaves of the welcome pine are yellow, and how to save the yellow pine of th

Mainly caused by improper watering. Dry pine wet cypress. Soil moisture between 15% and 30%. Less than 10%, the plant grows poorly, or even wilts, and above 35%, the root system is prone to death.

Solution: Do not water a lot, but must spray the foliage frequently, which has the effect of cooling and humidifying in summer.

The soil is loose, breathable and hygienic, and it is not disinfected and sterilized. Water is absorbed once when two-thirds of the soil is cultivated, and another third is cultivated with dry soil to absorb moisture the next day to maintain proper dry humidity.

This pine is the representative of the Huangshan pine, and even the symbol of the whole Huangshan, it is just like a hospitable host, waving his arms, warmly welcoming guests at home and abroad to visit Huangshan. In addition, there are also send-off pines and escort pines. Welcome pine on the left side of Yuping Building, Wenshu Cave above, leaning on the green lion stone to break the stone and born, 10 meters high, DBH meter, ground diameter 75 centimeters, high meters under the branches, the age of the tree has been at least 800 years, one of the "four uniques" of the Yellow Mountain.

One side of the branch stretches out, like a person stretches out an arm to welcome guests from afar, and the other hand is elegantly inserted in the trouser pocket, graceful and graceful. It is the iconic landscape and scenery of Huangshan.

The popularity of the welcome pine can be described as high. From the solemn Great Hall of the People to the station wharf, it will be found everywhere, and even the screen of the hotel and the shadow wall of the courtyard have the elegance of the welcome pine. The welcome pine has become a symbol of peace and friendship between the people of China and the world.

The huge iron painting "Welcome Pine" displayed in the Anhui Hall of the Great Hall of the People is made according to its image.

There may be three reasons for the yellowing of needles: first, the cultivation substrate is not loose and breathable; The second is to drench too often. The potting soil is in a long-term overhumid state, and the oxygen in the pot is insufficient; The third is improper fertilization. The frequency of fertilization is too dense or the concentration is too high, which damages the root system.

Welcome Pine. Yellowing, foliar spraying of ferrous sulfate.

Can turn yellow to green. Due to the large amount of phosphorus in the use of a large amount of fertilizer, the absorption of iron by plants is blocked, resulting in yellowing of the upper and middle leaves of plants and stunted growth and development.

physiological diseases.

Planting welcome matsudaira should be watered sparingly, and the soil should be moist. It needs to be shaded and lightly fertilized. In winter, water once every five days with sufficient water, no need to fertilize, and can be placed indoors for maintenance to avoid frostbite. In other seasons, the soil is usually watered when it is slightly dry, and fertilizer is applied once a month.

Maintenance method: 1. Soil.

Alkaline soil should not be used for planting welcome pine, but should be made with loose and fertile slightly acidic soil, or you can use sandy soil and humus soil to prepare it yourself.

2. Illumination. Although the daily maintenance of the welcome pine is generally placed indoors and is not easy to contact the sun, it is necessary to occasionally move out to dry, which will make the plant grow more noisy. If possible, I put it in astigmatism.

The maintenance of the environment is more conducive to the growth of the welcome pine.

3. Water and fertilizer. Generally, the temperature is relatively high in the summer, and the frequency of watering should be a little faster, and the Qingyin is watered once a day in the early morning or evening, and the spring and autumn seasons are almost every 2 or 3 days, and in the winter, they are basically watered once a week. You don't need much fertilizer to maintain the pine, so you can use some rotted farmhouse manure every 10 days during the growing period, and water it on the second day after the fertilizer is used.

How to save the yellow leaves of the welcome pine, hello, we have six fruits in the park, and the yellow leaves of the welcome pine appear, I don't know what to do.

First, the yellowing of the replacement of potting soil is likely to be caused by soil discomfort, and if the soil is not changed for a long time, the soil is seriously compacted, which hinders the respiration of the root system, and it is easy to lead to the yellow leaf situation. It is recommended to return to the soil replacement office as soon as possible to ensure that the soil used is soft, breathable, drainable and slightly acidic, and the welcome pine will soon return to normal growth in such a soil environment. Second, increase the light welcome pine Although the beam head has a certain shade tolerance, if the sun is not basked for a long time, the leaves can not carry out photosynthesis normally, which is easy to lead to yellow leaves.

If this is the case, it is necessary to increase the light as soon as possible, preferably 6-8 hours of light every day, and the astigmatism in the room will do, and the normal growth will soon return. Note that the strong light in summer must be blocked in time, not exposed to the sun, otherwise it is easy to sunburn. 3. Avoid stagnant water and welcome pine to have a certain drought tolerance and fear of waterlogging.

If you can't control the amount of water well when watering it, resulting in water accumulation in the potting soil, it will hinder the respiration of the root system, and the leaves will be easy to yellowing after a long time. If this is the case, it is necessary to drain the stagnant water as soon as possible, strengthen ventilation, and evaporate the water. Be careful to water it thoroughly at most, and it is strictly forbidden to accumulate water.

It is best to wait for the soil to dry and water thoroughly. Fourth, reasonable topdressing welcome pine has a certain ability to resist barrenness, and is afraid of thick fertilizer and fertilizer. If the concentration of fertilizer applied to it is high or raw fertilizer is used, it is easy to produce fertilizer damage, which will lead to yellowing of leaves.

If this is the case, rinse off the fertilizer by watering it with water as soon as possible. In addition, the soil is not good for acorn and poor, which will also hinder growth. If it is caused by lack of fertilizer, it is necessary to top dressing as soon as possible, and thin fertilizer can be applied less.

The yellowing of the pine may be caused by soil compaction, and it is necessary to repot it every once in a while and prune the root system properly during the growth of the pine. The yellowing of the welcome pine may also be caused by insufficient light, and it is necessary to give 6 to 8 hours of astigmatism every day during the growth period of the welcome pine to avoid the yellowing of the leaves.

The yellowing of the pine may be caused by the soil being too compact. Therefore, during the growth period of the welcome pine, it is necessary to repot every once in a while, and the roots of the welcome pine pot should be properly pruned, and disinfected and dried. When changing the soil, it is necessary to choose loose and breathable, acidic sandy loam soil with strong drainage, and after the new planting of heavy bridge trousers, it is necessary to regularly loosen the soil to ensure that the soil has good air permeability.

The yellowing of the pine may be caused by insufficient light. During the growth period, it is necessary to give 6 8 hours of light irradiation every day, so that the pine can fully photosynthesize, so as to grow verdant branches and leaves. In addition, when the sun is strong in summer, it is necessary to do a good job of shading to avoid being exposed to strong light.

Excessive fertilization may also cause yellowing of the foliage of the pine. During the growth period of welcome pine, fertilizer needs to be applied every 15 days to supplement nutrients, and attention should not be too much fertilizer to avoid fertilizer damage causing yellowing of branches and leaves. Fertilization can be stopped in autumn and winter, and the fertilizer needs to be diluted before watering.

Watering allergies may also lead to yellowing of the leaves of the welcome pine, so when watering the potatoes and hail water for the Yingke pine, it is necessary to carry out according to the dryness and wetness of the soil. In spring and summer, it can be watered every 3 5 days, and in autumn and winter, it can be watered every 10 15 days, and each time it is watered, it is enough to ensure that the soil is in a slightly moist state.