What should I do if the leaves of the big trees transplanted in the spring are yellow in the summer?

Tree decay in general cannot simply be attributed to one cause, but is often the result of the interaction of multiple causes. The causes of weakness change depending on the growing season and climate.

1. First of all, check whether there are any problems with the planting technique, understand the size of the soil ball, the habit of the seedlings, the planting season, whether the planting is too deep, whether there is water accumulation, and whether it is drought.

2. Whether the branch pruning method is appropriate, whether the branch is abnormal, and whether there is any tumor.

3. See if there are tall buildings around to block it, whether there is sewage or harmful gases or dust from chemical plants nearby, and whether it belongs to saline-alkali land.

4. Check whether the roots are rotten and moldy, whether new roots are generated, and whether the leaves are curled and wilted, yellowed or abnormally shed.

5. According to the inspection situation, you can choose standard 3721, nuclear energy, Niso and other products to treat as soon as possible and restore growth.

Why are newly planted trees in spring so easy to die in summer?

Newly planted trees sprout and grow in spring, but suddenly dry up and die in June and July. After actual observation and analysis, there are the following factors:

Newly planted trees sprout too much, have too few or no capillary roots, and sometimes only callus is found at the broken roots.

Reason analysis: Before May, the temperature was low, the nutrients and water stored in the tree were sufficient, and the water absorbed by the root system could still meet the needs of tree germination and growth, so the tree issued a large number of new shoots. But for other reasons, such as:

The water is seriously polluted, and the content of toxic substances and germs is too high.

The soil is compacted, poorly aerated and some contain rooting inhibitors.

Uncomfortable ground temperature. Improper use of pesticides, such as excessive use of fungicides due to weeding.

All of the above causes can cause no new roots or few new roots to grow slowly, and even the original old roots rot and die. In June, due to the increase in temperature, the water evaporation and loss of the tree body is too fast, resulting in an imbalance in water supply. At the same time, the high temperature makes the plant metabolism vigorous, and the rooting promotion substances of the tree roots are degraded too quickly, which cannot meet the needs of new root growth, so the new shoots wither and the trees die.

2) The trees themselves suffer from serious pests and diseases. Such as root rot, white silk disease, dry rot, gidding worm and longhorn beetle pests. The spring temperature is low, not suitable for the occurrence of pests and diseases, after entering May, with the increase in temperature, pests and diseases gradually begin to occur in large quantities, and reach the vigorous period in June and July.

The vascular bundles of trees are gradually damaged due to pests and diseases, resulting in an imbalance in water supply and the death of trees.

In view of the above reasons, the following points should be paid attention to in spring tree planting and management:

Select high-quality seedlings without diseases and insects.

Pay attention to the soil condition of the planting site, if it is alkaline, you can apply organic fertilizer to improve it.

If necessary, some rooting promotion substances can be applied to newly planted seedlings, such as Happy Forest Rooting Powder, Chunyu No. 1, etc. Apply some fertilizers that are conducive to rooting, such as a small amount of urea and humic acid fertilizers.

After the tree is planted, in addition to the regular watering, the anti-transpiration inhibitor of the happy forest can be sprayed on the leaves. Some growth-inhibiting substances can also be sprayed, such as intelligent control, paclobutrazol, etc., to control the growth of the upper part of the plant and reduce water consumption.

After the tree sprouts, the buds should be removed from the appropriate parts and all others should be erased.

Pay close attention to pests and diseases, and find pests and diseases in a timely manner. It can be used to control root rot with exacerbium (30% allicin), Fushengling, etc., and to control underground pests such as green health and carbofuran.

Newly transplanted trees in spring have yellowing leaves, so peel off the mulch underneath and loosen the soil!

It is normal for the leaves of the newly transplanted trees to turn yellow, this is because the root system of the transplanted tree can not absorb water and nutrients, so it will lead to yellow leaves or dry up, there is no mental state, you can water a small amount of water and fertilizer to promote it to take root and sprout, and you can absorb nutrients.

If the light is too strong, the plant should be properly shaded to prevent the plant from being damaged twice, and then the plant should be properly watered, usually to keep the soil moist and not dry. If you are worried that the yellowed leaves will absorb too much nutrients and water, you can cut off all the yellowish leaves and use the light pruning method when pruning.

After pruning is completed, potassium permanganate can be properly applied to the wound, which has the effect of disinfection and sterilization, and can also promote the speed of wound recovery. The demand for fertilizer is not high, but it should be properly applied with Bika water-soluble fertilizer when planting.

In autumn, the green pigment slowly fades, and the red pigment and yellow pigment are revealed. All leaves contain green chlorophyll, which is used by trees to capture light energy and store it in the form of chemicals such as sugar with the help of other substances in the leaves.

In addition to chlorophyll, many leaves contain other pigments such as yellow, orange and red. Although these pigments do not photosynthesize in the same way as chlorophyll, some of them are able to transfer captured light energy to chlorophyll.

In spring and summer, chlorophyll is much more abundant in the leaves than other pigments, so the leaves show the green color of chlorophyll, and the color of the other pigments is not visible.

Yellow leaf disease caused by iron deficiency will appear yellowing of leaves, irrigation should be controlled, not too dry or flooded, poor root growth or poor breathing will make the absorption of iron decrease, this phenomenon should be paid attention to in fertilizer and water management, you can spray some ferrous sulfate foliar fertilizer to alleviate it. It may be caused by hot dry wind, and if so, potassium dihydrogen sulfate.

The yellowing of plant leaves may be due to calcium deficiency, and calcium fertilizer can be sprayed on the foliar surface to enhance the toughness of the leaves, and it is not easy to have dry yellow leaves.

Like the kind of jackfruit that has just emerged is very fragile and needs careful care, water and temperature are especially important and must be suitable, the temperature should not be too high, and the water should not be watered too much, and it must shine more in the sun to allow its leaves to fully photosynthesize. Yellow leaves do not need to be picked, you can apply high-efficiency slow-release fertilizer to it, the kind of small granular is better, you must follow the instructions for use, not too much, otherwise it will burn seedlings, this fertilizer is sprinkled on the surface of the soil and do not need to care about it, 3 months later, you can look at the situation and then add it appropriately.

In the process of pineapple growth, if it encounters natural environmental influences such as high temperature, low temperature, drought, etc., or when pests and diseases, excessive application of fertilizers and pesticides cause fertilizer damage, the leaves will turn yellow and even the whole plant will die.

Pineapple is a tropical perennial herbaceous crop, with the change of seasons, its leaves in the winter yellowing or even falling off is a very normal physiological activity, under normal circumstances, the next day can send out new roots and new leaves.

Pineapples have their own special growth habits: they usually take new roots after about 1 month at a temperature of 22 to 24. The suitable temperature of root growth is 29-31, and the growth is stopped when it is lower than 5 or higher than 43. Roots begin to grow in March and grow rapidly as the temperature increases.

Growth peaks from late May to July, slows down after October, and near-surface root dies from December to February due to cold and drought. Spring warm leaves begin to extract, May to July leaf color is dark green, growth is faster, winter basically stop extraction, leaf color turns red and yellow, such as cold damage leaf tissue dehydration and green, will dry up.

There are 2 reasons why pineapple leaves turn yellow, one is due to watering problems and the other is fertilization problems.

Too much water, spinach watering more will cause the root system to lack of oxygen resulting in yellow leaves, generally watering can be inserted into the soil with chopsticks to see whether the spinach root part is short of water, as long as the soil is moist, do not need to water.

In addition, when there is a lack of trace elements such as iron, manganese, boron and zinc, yellow leaves, small leaves and soft rot will also occur, which can be solved by spraying spinach special foliar fertilizer in the later stage of growth.

If the bottom leaves of spinach grow new roots from the leaf axils, the leaves turn yellow, which is a normal phenomenon and is the metabolism of spinach itself.

Causes and solutions to the yellowing of plants in winter.

Normal metabolism: In winter, the plant will lose its leaves to store nutrients; Lack of nutrients: if the nutrients are not sufficient for a long time, there will be yellow leaf atrophy and other diseases, do not fertilize immediately during the dormant period, and fertilize once before dormancy; Improper watering:

Winter is dry, it should be watered in time, but not too much; High temperature: If you put the plant near a heater or other equipment, you will also have yellow leaves.

Causes and solutions to the yellowing of plants in winter.

Normal metabolism. This is a normal situation, so don't worry too much, just dispose of the yellow leaves, and it will return to normal after a while.

Flower. Lack of nutrients.

This is the same as people, if the nutrients are not sufficient for a long time, people will also be thin and shriveled. Therefore, when the plant does not have enough nutrients for a long time, the leaves will also appear yellowing. At this time, nutrients should be supplemented according to the state of the plant.

If it is a dormant plant, it is not recommended to fertilize it immediately, or even to fertilize it. If the growth is slow, a small amount of fertilizer can be applied, and fertilization should be strengthened during the growth period.

Flower. Improper moisture.

Too much or too little water at any time will cause the leaves of the plant to turn yellow. It is more serious in winter, because the environment in winter is dry, and then the potting soil is too dry, so it is difficult not to yellow; In winter, when the temperature is low, the loss of water will be greatly reduced, and if you need to water too much at this time, the soil will be in a state of excessive moisture for a long time, which will also easily make the leaves yellow.

The temperature is too high. When placing plants at home, be sure not to be close to the air outlets of heating and other equipment, otherwise it is easy to cause yellowing of plant leaves.

Flower. The temperature is too low.

Plants have a minimum temperature limit, the temperature is already below the range that the plant can tolerate, its leaves are prone to yellowing, and even the whole plant can be frostbitten and freeze to death. Therefore, friends must understand what the temperature range of the plant can withstand when maintaining.