What is the reason why the leaves of green plants turn yellow? How to solve?

Leaves are not only the main organs of plant photosynthesis, but also the organs of transpiration, which are generally divided into three parts: leaves, petioles and stipules, and the color is usually green. So, what is the reason why the leaves of green plants turn yellow? How to solve?

First, what is the reason why the leaves turn yellow?

First, the soil is alkaline: many plants are suitable for growing in slightly acidic soil. If the soil is alkaline, the soil texture will be hard, agglomerated, poor ventilation and permeability, and the plant will show the phenomenon of green turning yellow between the old leaves and leaf veins.

Second, too much watering: for some plants that are not resistant to waterlogging, if overwatered, the air in the soil will be discharged by water, and the external air will be prevented from entering, resulting in extreme lack of oxygen in the soil, and the roots will not get the oxygen they need. young leaves or leaf tips will turn yellow first.

Third, too little watering: for some wet plants, if too little watering, the leaves will turn yellow due to lack of water, this is lack of water yellow, the performance of the plant's old leaves turn yellow, slowly new leaves will also turn yellow, the edges of many leaves will change from yellow to dry.

Reason 4, the temperature is too low: for some plants that are not cold-tolerant, if the temperature is too low, it will cause freezing damage to the plant, causing the leaves of the plant to turn yellow, and in serious cases may cause death.

Reason 5, lack of light: for some light-loving plants, if lack of light, plants can not carry out photosynthesis, resulting in yellowing leaves, serious cases will lead to leaf shedding or even death.

Reason 6, strong light exposure: for some plants that like shade, putting the plant under strong light exposure will cause the leaf edge and tip of the leaf to turn yellow and dry, and the part directly exposed by the sun will appear macula.

Reason 7, too little fertilization: some plants have a great demand for fertilizer. If there is too little fertilizer, the plant can not absorb enough nutrients, which will cause the old leaves to turn yellow first and then the new leaves to turn yellow.

Reason 8, excessive fertilization: fertilization generally can not be too much, otherwise it will damage its roots, resulting in burning seedlings, resulting in yellowing leaves, edge curling, leaf tips gradually withered yellow, serious plant death.

Reason 9, diseases and insect pests: the leaves may be suffering from diseases or pests, endangering the leaves, causing the leaves to turn yellow.

Second, how to solve the yellowing of leaves?

1. The solution to the yellowing of leaves caused by soil partial alkali: acidic fertilizers such as aluminum sulfate, ferrous sulfate, sulfur powder, ammonium sulfate, ammonium nitrate, calcium superphosphate, potassium dihydrogen phosphate and potassium sulfate can be used in the soil to neutralize alkalinity; soil rich in organic matter can also be replaced.

2. The solution to the yellowing of leaves caused by too much watering: you can put the plant in a ventilated and well-lit place to let the water out as soon as possible; you can also add some dry soil into the flowerpot to increase the absorption of water; or change the soil directly, or replace the flowerpot with good water permeability.

3. The solution to the yellowing of leaves caused by too little watering: timely watering, watering thoroughly, and maintenance in a cool place.

4. The solution to the yellowing of leaves caused by too low temperature is to raise the temperature and control the plant at a suitable growth temperature.

5. the solution to the yellowing of leaves caused by lack of light: if it is summer, put the plant in a place with plenty of light, let it slowly return to normal, do not put it directly in the sun; if it is spring or winter, you can put it directly in the sun.

6. the solution to the yellowing of leaves caused by strong light explosion: cut off the severely burned leaves and give the plant shade maintenance until it recovers; or put the plant in a cool place for maintenance, and the burned area will slowly return to normal.

7. the solution to the yellowing of leaves caused by too little fertilization: increase the application of fertilizer, such as urea, rotten fertilizer cake water, phosphate fertilizer, plant ash, potassium chloride fertilizer, etc., and apply whatever fertilizer is lacking.

8. The solution to the yellowing of leaves caused by excessive fertilization: wash and dilute the fertilizer in the pot soil with clean water, then put the flowerpot in a cool place and wait for the pot soil to dry before normal maintenance; or wash the roots of the plant with clean water, change the culture soil, and put it back on the pot.

9. The solution to the yellowing of leaves caused by diseases and insect pests: first, pull out the diseased plants, then move to the ventilated place, and spray chemicals to control diseases and insect pests.

The reasons for the yellowing of green plant leaves are soil alkali, too much watering, too little watering, too low temperature, lack of light, strong light exposure, too little fertilization, too much fertilization, diseases and insect pests, etc., different reasons, different solutions.