The Latest Methods and Common Misconceptions of Fertilizer Flushing for Fruit Trees

Fertilizer flushing for fruit trees plays a big role in fruit tree growth and yield increase. Using flush fertilizer rationally and mastering the application methods of flush fertilizer can greatly improve fertilizer use efficiency. However, many fruit growers also have many misconceptions when using it. Let's take a look together with the editor at the methods and misconceptions of fruit flushing fertilization.

I. Application Methods of Fertilizer Flushing for Fruit Trees

1. Sap flow period

Starting in March every spring, when the ground temperature exceeds 5 degrees, the sap begins to flow, and the root system gradually begins to take up nutrients. As the ground temperature gradually rises, the root growth amount also follows, and the fruit trees begin to store nutrients for bud break and flowering. This is when the first period of large fertilizer demand arrives. At this time, in order to promote the growth of branches and leaves, nitrogen fertilizer should be the main type, and topdressing can also be carried out according to tree vigor. For those with strong tree vigor, 8 kg of organic water-soluble fertilizer can be flushed per mu, while for seedlings with weak tree vigor and a large amount of flowering, about 12 kg should be applied.

2. Flower bud differentiation

When fruit trees enter the flower bud differentiation stage, the root system enters the second growth peak period. At this time, phosphate fertilizer can be added to promote flower bud differentiation. Combined with watering, 8-12 kg or 6-9 kg of organic water-soluble fertilizer can be flushed per mu to supplement tree nutrition and restore tree vigor.

3. Fruit expansion period

July to September is the third growth peak period of the root system. The fruit also enters the expansion period, and it is also the period of flower bud formation and fruit coloring. At this time, adding potassium fertilizer can significantly improve fruit quality and promote fruit expansion. Summer has high temperatures and frequent rain, so this topdressing should be carried out according to the weather.

II. Misconceptions About Flush Fertilization

1. Not following a pattern

The use of flush fertilizer follows the principle of small amounts and multiple applications. The purpose is for the crop root system to fully leach the nutrients. If there is no pattern, it will not only affect root absorption but also cause excess nutrition.

2. Flood irrigation

Flood irrigation in winter has a great impact on fruit trees. After flushing fertilizer with water, the low temperature will drop significantly, and soil aeration will also deteriorate, causing root rot, and in severe cases causing fruit tree root rot.

3. No concept of time

When using it, pay attention to soil moisture. Do not flush when the soil is too wet, so as not to affect soil aeration and cause root rotting and yellowing of heart leaves. At the same time, pay attention to weather changes, and choose to flush when the weather turns clear after a cold snap, avoiding the use of flush fertilizer during continuous cloudy days.

The above is an introduction to the methods and misconceptions of fertilizer flushing for fruit trees. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.