Methods and misunderstandings of flushing fertilization for fruit trees

Flushing fertilization of fruit trees has a great effect on the growth and yield increase of fruit trees. rational use of flushing fertilization and mastering the use method of flushing fertilizer can greatly improve the efficiency of fertilizer use. And many fruit growers also have a lot of misunderstandings in their use, so let's take a look at the fruit flushing fertilization methods and misunderstandings with Xiaobian.

I. the use method of flushing fertilization for fruit trees

1. Sap flow period

Starting from March every spring, when the ground temperature exceeds 5 degrees, the sap begins to flow, and the roots begin to get slowly. As the ground temperature rises gradually, the root growth becomes whine, and fruit trees begin to store nutrients for germination and flowering. At this time, it is the first time that a large amount of fertilizer is needed, and at this time, in order to promote the growth of branches and leaves, nitrogen fertilizer should be given priority to. At the same time, topdressing can be carried out according to the tree potential. If the tree is strong, 8 kg of organic water-soluble fertilizer can be applied per mu. On the other hand, the seedlings with weak tree potential and large flowering amount are applied about 12 kg.

2. Flower bud differentiation.

When the fruit tree enters the flower bud differentiation and the root system enters the second growth peak, we can increase the application of phosphorus fertilizer to promote the flower bud differentiation, combined with watering, apply 8-12 kg or 6-9 kg organic water-soluble fertilizer per mu to supplement the tree nutrition and restore the tree potential.

3. Fruit expansion period

The third peak period of root growth is from July to September, and the fruit also enters the expansion period, which is also the period of flower bud formation and fruit coloring. At this time, the application of potassium fertilizer can obviously improve the fruit quality and promote the fruit expansion. It's hot and rainy in summer, so this topdressing depends on the sky.

Second, the misunderstanding of flushing fertilization.

1. Pay no attention to the law

The use of flushing fertilization pays attention to the principle of a small number of times, in order to completely infiltrate nutrients into the crop root system, if there is no law, it will not only affect the root system absorption, but also cause overnutrition.

2. Flood irrigation

The effect of flood irrigation on fruit trees in winter is sweet. After applying fertilizer with the water, the low temperature will decrease obviously, and the air permeability of the soil will worsen, which will cause rotten roots and, in serious cases, rotten roots of fruit trees.

3. No concept of time

Pay attention to soil moisture when in use, do not apply when the soil is too wet, so as not to affect the soil permeability and cause retting roots and heart leaves to turn yellow. At the same time, we should pay attention to the weather changes and choose to apply it when the weather turns fine after the cold spell, so as to avoid the use of flushing fertilizer in continuous cloudy days.

The above is the introduction of fruit tree flushing fertilization methods and misunderstandings, hope to help you, want to know more related knowledge, please pay attention to us.