Correct methods and common misconceptions of fertigation for fruit trees
Fertigation for fruit trees plays a big role in tree growth and yield increase. Using fertigation rationally and mastering the application methods can greatly improve fertilizer use efficiency. However, many fruit growers also have many misconceptions when using it. Below, let's take a look at fertigation methods and misconceptions for fruit trees with the editor.
I. Application methods of fertigation for fruit trees
1. Sap flow period
Starting in March every spring, when the ground temperature exceeds 5°C, sap begins to flow, and the root system gradually begins to take up nutrients. As the ground temperature gradually rises, root growth increases accordingly, 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. At the same time, topdressing can be carried out according to tree vigor. For vigorous trees, 8 kg of organic water-soluble fertilizer can be applied per mu by fertigation, while for weak trees or seedlings with 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 its second growth peak. At this time, phosphorus fertilizer can be added to promote flower bud differentiation. Combined with watering, apply 8-12 kg or 6-9 kg of organic water-soluble fertilizer per mu by fertigation to supplement tree nutrition and restore tree vigor.
3. Fruit enlargement period
July to September is the third growth peak of the root system, and the fruit also enters the enlargement period. 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 enlargement. Summer has high temperatures and frequent rain, so this topdressing should be carried out according to the weather.
II. Misconceptions about fertigation
1. Ignoring the rules
The use of fertigation follows the principle of small amounts applied many times, so that the crop root system can fully infiltrate the nutrients. If there is no regularity, it will not only affect root absorption but also cause excess nutrition.
2. Flood irrigation
The impact of flood irrigation in winter on fruit trees is great. After applying fertilizer with water, the low temperature will drop noticeably, and soil aeration will also deteriorate, causing root rot, and in severe cases causing fruit tree root rot.
3. No sense of timing
When using it, pay attention to soil moisture. Do not apply by fertigation when the soil is too wet, so as not to affect soil aeration and cause root suffocation and yellowing of young leaves. At the same time, pay attention to weather changes, and choose to apply by fertigation when the weather turns clear after a cold wave, avoiding the use of fertigation during continuous overcast days.
The above is an introduction to fertigation methods and misconceptions for fruit trees. We hope it can help you. If you want to learn more related knowledge, please stay tuned to us.