Causes and control methods of yellow leaves of leafy vegetables

There are many varieties of leafy vegetables in our life, but they often encounter the phenomenon of leaf yellowing in the process of planting, which seriously affects the economic income of farmers, so what is the cause of yellow leaves of leafy vegetables? How to prevent and cure it? Come and have a look with the editor.

1. Yellow leaves of leafy vegetables

1. Water is yellow. The yellow leaves in this situation are actually caused by overwatering or over-watering in the process of cultivation. The characteristic of water-yellow leaves is that there is no obvious change in the old leaves, but the young leaves turn yellow.

2. Fat yellow. Fat yellow, as its name implies, is caused by excessive fertilization or high concentration of fertilization. the characteristic of fat yellow is that its young leaves are thicker, shiny and uneven.

3. Dry and yellow. Dry yellow is caused by lack of water, and it is characterized by the yellow of old leaves from top to bottom. If it is not watered in time, it will cause the whole plant to wither and yellow, and even die.

4. Hungry yellow. Contrary to Fei Huang, it is caused by too little fertilization. this will also happen if the fertilization concentration is too low and the interval between fertilization is too long. it is characterized by yellow young leaves and tender stems, and if it is not fertilized in time, it will also cause the death of the whole plant.

Second, prevention and control skills

1. Thinning flowers and fruits

After the temperature rises, the growth rate of vegetables is accelerated, and the nutrients absorbed by the roots are limited, which can not meet the needs of plant growth and development, so the phenomenon of yellow leaves will appear. At this time, the nutrient consumption of plants should be reduced in time. And the most effective method is to thinning flowers and fruits, removing the lower old leaves in time to meet the nutritional needs of vegetables.

2. Spraying foliar fertilizer

In addition, when root absorption can not meet plant consumption, extra-root fertilization can be adopted to supplement nutrients, and foliar fertilizer is effective. Foliar fertilizer containing humic acid, amino acid, boron, magnesium, zinc and other foliar fertilizer can regulate crop growth, promote leaf recovery as soon as possible, and enhance plant growth.

3. Choose suitable fertilizer for root cultivation.

Many fertilizers on the market can promote plant rooting, although regulating crop growth, promoting leaf recovery as soon as possible, enhancing plant growth rapidly, but the survival rate is low, it is easy to die in a bad environment, and root growth and development will also snatch nutrients. On the contrary, it will aggravate the phenomenon of yellow leaves. Therefore, when selecting rooting products, the selection can not only promote rooting and rooting, improve the resistance of the root system to the adverse environment, but also ensure adequate nutrients such as nitrogen, phosphorus and potassium.

4. Temperature control

The external temperature rises quickly in spring, we should pay attention to the temperature control in the shed, so as to avoid heating up too fast and avoid acute wilting. The general temperature should not exceed 28-30 degrees. When the temperature is too high, it should be ventilated and cooled in time.

The above is the introduction of the causes and control methods of yellow leaves of leafy vegetables. I hope it can help you. If you want to know more about it, please follow us.