In terms of fertilizer requirements for dwarfing Rocki apples, proper fertilization is essential to promote high yield and high quality. Fertilizer is the basis for the growth and development of apple trees, and scientific fertilization can ensure the health of the tree, increase the yield and improve the quality. In this paper, the fertilizer demand characteristics, fertilization methods and precautions of dwarf Leki apples will be used to help fruit farmers apply fertilizer reasonably and achieve high yield and high quality.
1. Fertilizer demand characteristics of dwarf Leki apples.
Dwarf Leki apple trees have the characteristics of compact tree, slow growth, early fruiting and high yield. As a result, its fertilizer requirements are also different from those of other apple varieties. In general, dwarf Rockit apples require sufficient nutrients such as nitrogen, phosphorus, and potassium, and the demand for trace elements is also relatively strict.
1.Nitrogen fertilizer: Nitrogen is one of the nutrients necessary for the growth and development of apple trees. Dwarf Rockit apples have a relatively high nitrogen requirement, especially in spring and summer, and nitrogen fertilizer needs to be properly supplemented to promote tree growth and fruit development.
2.Phosphate fertilizer: Phosphorus is an essential nutrient for the development of apple trees, which plays an important role in improving fruit quality and yield. The phosphorus requirement for dwarf Rocky apples is relatively low, but it still needs to be properly supplemented.
3.Potassium fertilizer: Potassium has the effect of promoting the growth of apple trees, improving fruit quality and enhancing the stress resistance of the tree. Dwarf Rockie apples have a high potassium requirement, especially during the fruit development period, and need to increase the amount of potassium fertilizer.
4.Trace elements: Dwarf Leki apples also have strict requirements for trace elements, such as iron, zinc, boron, etc. Deficiencies in these elements can lead to poor growth, reduced yields, and poor quality.
2. Fertilization methods and precautions.
In order to meet the fertilizer needs of dwarf Loki apples, growers need to adopt appropriate fertilization methods and precautions.
1.Base fertilizer: Base fertilizer is the basis for the growth of apple trees, generally based on organic fertilizer, and at the same time with an appropriate amount of chemical fertilizer. When applying basal fertilizer, the fertilizer should be evenly sprinkled under the canopy, and then the soil should be plowed so that the fertilizer is well mixed with the soil.
2.Top dressing: According to the growth and development of apple trees, fertilizer should be applied in a timely manner. Top dressing is generally based on available nitrogen fertilizer, with appropriate amount of phosphorus and potassium fertilizer. When topdressing, it is necessary to be appropriate and even, and avoid too much or too little fertilization that affects the growth of the tree and the development of fruits.
3.Foliar Spray: Foliar spray is a method of fertilization that quickly replenishes nutrients. Foliar application of micronutrient and macronutrient fertilizers can meet the nutrient needs of apple trees during growth and development. When spraying, it is necessary to choose the appropriate concentration and timing to avoid too high or too low concentration to affect the health of the tree and the quality of the fruit.
4.Reasonable matching: In the process of fertilization, we should pay attention to the reasonable combination of nutrients such as nitrogen, phosphorus, and potassium. At the same time, it is also necessary to pay attention to the combination of organic fertilizer and chemical fertilizer to improve fertilizer utilization rate and reduce environmental pollution.
5.Control the amount of fertilizer: The amount of fertilizer to be applied should be determined according to the growth of the apple tree and the status of soil nutrients. Avoid applying too much or too little fertilizer that will affect tree growth and fruit quality. At the same time, it is also necessary to pay attention to balanced fertilization to avoid the deficiency or excess of certain nutrients.
6.Timely fertilization: Timely fertilization is the key to ensuring the healthy growth of apple trees and the high quality and yield of fruits. In the process of fertilization, it is necessary to choose the appropriate time for fertilization according to the growth law and fertilizer needs of apple trees. For example, the application of nitrogen fertilizer before flowering can promote flowering and fruit set;The application of potassium fertilizer during the fruit expansion period can promote fruit development and improve quality.