What happened to the knotted ash leaf roll?

The curly leaves of the ash may be caused by too much sunlight in summer, so it is necessary to pay attention to proper shade to avoid burning and drying. It may also be caused by insufficient watering, which should be watered thoroughly in time, and the frequency of watering can be increased during the period when the water evaporation is more vigorous. It may also be caused by too thick and heavy fertilization, and should be insisted on applying thin fertilizer and frequent application of Bika water-soluble fertilizer, and too much fertilizer needs to be diluted with a large amount of watering.

Or it may be caused by soil alkalization, and ferrous sulfate solution can be watered.

Discharge cooling is another type of convection cooling. Unlike regenerative cooling, the coolant used for exhaust cooling absorbs heat to the thrust chamber and is discharged out of the combustion chamber instead of entering the combustion chamber to participate in combustion. Direct drain coolant reduces the thrust chamber specific impulse, so the coolant flow for drain cooling needs to be minimized while only using drain cooling at the outlet section of the nozzle that is relatively less heated.

There is also radiative cooling, in which the heat flow is transferred from the combustion products to the thrust chamber, and then the heat is radiated by the thrust chamber wall to the surrounding space. Radiative cooling is characterized by simplicity and small structural mass. It is mainly used in the extension section of large nozzles and the thrust chamber of small thrust engines using high-temperature resistant materials.

When cooling in the thrust chamber of the tissue, a relatively low temperature liquid or gas protective layer is established on the surface of the thrust chamber wall to reduce the heat flow to the thrust chamber wall, reduce the wall temperature, and achieve cooling. Internal cooling is mainly divided into three methods: internal cooling (shield cooling), membrane cooling and diaphoretic cooling of head tissues. After the internal cooling measures are adopted in the thrust chamber, the mixing ratio near the wall of the combustion chamber is different from the optimal mixing ratio in the central area (in most cases, the near-wall layer rich in fuel is used) due to the need to reduce the temperature of the protective layer, resulting in the uneven distribution of the mixing ratio along the cross-section of the combustion chamber, so that the combustion efficiency is reduced to a certain extent.

Membrane cooling is similar to shield cooling in that it cools the thrust chamber wall by establishing a uniform and stable coolant film or air film protective layer near the inner wall surface, except that the coolant used to establish the protective layer is not injected by the injector, but is supplied through a special cooling belt. The cooling band is generally arranged in a cross-section of the combustion chamber or the convergence section of the nozzle. There can be several cooling bands along the length of the combustion chamber.

In order to improve the stability of the membrane, the coolant often flows through the gaps or small holes in the cooling belts, and when sweating is used, the thrust chamber wall or part of the inner wall is made of porous material with a pore diameter of tens of microns. Porous materials are usually sintered with metal powders or pressed with metal mesh. In this case, the number of pores per unit area is increased by making the micropores in the material as evenly distributed as possible.

The liquid coolant penetrates into the inner wall, creating a protective film that reduces the density of the heat transferred to the wall. When the flow rate of liquid coolant used for sweat cooling is above a certain threshold, a liquid film is formed near the wall of the thrust chamber. When the coolant flow rate is below the critical flow, the inner wall temperature will be higher than the coolant boiling point at the current pressure, and some or all of the coolant will evaporate, forming an air film.

In addition to the above thermal protection, there are other thermal protection methods such as: ablation cooling, thermal insulation cooling, hot melt cooling and composite protection of chamber walls. 3. Thermal protection scheme of high enthalpy gas generator Based on the above methods and the actual situation, the thermal protection method of high enthalpy gas generator is obtained.

The combustion chamber of a high-enthalpy gas generator differs from that of a liquid rocket engine, eliminating the front thrust chamber part, making its structure simpler and more effective. Then, the thermal protection involved is the thermal protection part of the combustion chamber wall. As the fuel enters the combustion chamber, it quickly decomposes and releases large quantities.

Causes: It may just be normal metabolism, natural aging.

Solution: If it is for this reason, you don't need to worry, you just need to cut off the yellow leaves and continue to maintain them carefully.

Reason: Although it does not require much water, it can also turn the leaves yellow due to drought if it is not watered for a long time. However, if there is too much glue, it will hinder the breathing of the roots, which will also lead to this situation.

Solution: If there is a lack of water, you can water it properly, and if there is too much water, put it in a ventilated place to promote the evaporation of water.

Reason: If there is too little fertilizer, or the pot is too small, it will cause the leaves to turn yellow due to insufficient nutrients**. Once too much fertilizer is applied, the concentration of fertilizer is too high, which will also damage the roots and cause yellowing.

Solution: If the fertilizer is too little, you can supplement the fertilizer appropriately, and if the concentration is too high, you need to water and dilute part of the fertilizer.

Reason: Too little or too much light can also make the leaves yellow.

Solution: Adjust the light, see more light during the growing season, and shade it in summer.

Reason: If you don't pay attention to protection in winter, it will also cause frostbite and cause yellowing of leaves.

Solution: Take protective measures in winter and increase the temperature.

Ash leaves dry and curled up may be caused by too strong light, although it likes light, but it is not resistant to exposure to the sun, strong light exposure will be sunburned, and the leaves will dry up and fall. It may also be caused by insufficient watering, preferring a moist environment, the soil is dry for a long time and cannot absorb water, and the leaves will dry up and fall. It is necessary to replenish water in time and make the soil slightly moist during the growing season.

In addition, it may also be a fertilizer damage caused by excessive fertilization, so it is necessary to rinse off the fertilizer with water.

1. Poor respiration and even rot of the root system caused by excessive watering. The symptoms are: the old leaves do not change much or darken, and the young leaves turn yellowish.

In this case, the soil can be loosened and watered in a mild way, or the pot can be raised and drained, and in severe cases, the soil should be replaced.

2. Yellowing of leaves caused by drought. It is characterized by the gradual development of yellowing parts from old leaves to new leaves. This is often caused by not being watered thoroughly.

It is possible to put half a pot of water into a pot with falling stones, and put the white ash bonsai into the water with a pot, so that the water can wet the potting soil thoroughly through the drainage hole. In the future, pay attention to keep the potting soil moist.

3. In spring, if the jointed ash bonsai is turned and repotted too early, it will cause the plants to freeze and cause the bonsai leaves to turn yellow. It is characterized by scorched and yellowish leaves. Therefore, it is important to grasp the timing of repotting.

4. Caused by excessive fertilization or excessive concentration. It is characterized by the gradual yellowing and shedding of the old leaves, while the new leaves are thick and shiny. The remedy is to increase the amount of watering, drain the fertilizer from the soil, or sprinkle some rapeseed such as radish and cabbage on the pot surface to consume the nutrients in the pot after it germinates.

5. It is caused by insufficient fertilization, or too small pots and too much potting soil. It can be overcome by turning the pot in time to change the soil and increase the application of fertilizer. Caused by the lack of light, it can be caused by intensifying the light, and it can be solved by enhancing the light studio.

At this time, the leaves should have fallen off a long time ago, remember to apply some fertilizer to the soil in winter, water as little as possible, remember that a principle is that it is dry and dry, and wet is wet.

Hello Because I didn't see it in person, it's hard to say what the problem is Let's talk about a few reasons for this problem in general, and compare them to see what the reasons are:1See if it is too watered, and whether the root soil is too wet for a long time, which is easy to rot roots and lose leaves; 2.

Whether to fertilize the jointed ash now, the jointed ash belongs to the better to feed the plant, if you need to fertilize, generally start in September, usually as long as you pay attention to the maintenance on the line. Now that the weather is getting hotter, if you always fertilize, it is easy to lead to nutrient root burning, so it is recommended to start fertilizing after September; 3.Look at its growth environment, whether it ensures ventilation and light, after all, it is a plant and needs photosynthesis; 4.

See if the leaves dry up and fall off. Leaf dryness, yellowing is generally the soil alkaline and long-term sprinkler irrigation. Yellowing disease should be treated with ferrous sulfate press 1:

After dissolving 400 mixed with water, irrigate the roots, irrigate once every other week, 3 or 5 times in a row to heal.

Generally speaking, this is the case, I don't know if it will help you If what I said is not comprehensive enough, you can consult Wuhan Lvlin Horticulture Engineering Co., Ltd. They are specialized in this and must have more say in this over

It's not a big deal, it must be your white ash but water, less sunlight, and no fat at all.

I also have a family that snorts and drops the leaves, and when they grow, they fall when they grow, and it is winter, and they kneel and beg for the reason.