Fruit tree spring fertilizer technical guidance

After the fruit trees enter the spring, as the temperature rises, the growth speeds up and the amount of water required for fertilizer increases gradually. During this period of growth, a large number of nutrients, especially nitrogen and trace elements, must be absorbed from the soil by the shoots, leaves, flowers, and fruit set. Therefore, in the spring nutrient management of fruit trees, proper top dressing is very important.

First, fruit tree fertilization principle

The fertilization of fruit trees should adhere to the combination of basal fertilizer and topdressing, and the basic fertilizer should be re-applied, and the principle of top dressing should be supplemented. That is, the base fertilizer should be applied before autumn and winter, and the appropriate amount of top dressing should be applied in spring and summer in order to meet the demand of fruit trees for different nutrients.

Fertilizer varieties of fruit trees should adhere to the principle of three cooperation: organic fertilizer and chemical fertilizers, nitrogen, phosphorus and potassium fertilizers, and a large number of elements in combination with trace elements and fertilizers to meet the needs of fruit trees for full nutrition.

Second, the fruit tree spring fertilizer technology

According to the fact that the fruit grower is mistaken in understanding, most of the orchards have not applied the current situation of autumn fertilization. Fertilizer should adopt two measures this spring.

1, spring fertilizer. The orchard that has been applied to basal fertilization is mainly nitrogen fertilizer in the spring, and it is aimed at attacking leaves. The majority of growers must understand that "full-fledged basal fertilizers will strengthen the roots in the autumn and nitrogen fertilizers will attack the leaves in the spring." It is clear that having good roots can grow good leaves, and that having good leaves will result in more results and better results. The amount of spring topdressing is apple. For example, mature orchards generally apply 1 kg of urea or 3 kg of ammonium bicarbonate to each tree. Before the winter, they did not use “Zhenzhong 28” multi-element fertilizer, and each tree was combined with topdressing nitrogen fertilizer 3~4. Jin "Saizhong 28" fertilizer. The fertilization period was completed from the beginning of thawing to 10 to 15 days before germination.

2, spring fertilization. In the orchard without basal fertilizer before the winter, the fruit growers should apply fertilizer according to the soil fertility conditions and yield indicators of their orchards. Generally, 1 to 2 pounds of urea, 2 pounds of superphosphate and 3 to 4 pounds of “Saizhong 28” fertilizer are applied to each tree. Conditional farmers are striving to apply organic fertilizers again. The fertilization time should also be completed 10 to 15 days before sprouting.

Third, fertilization method

The fertilization in spring should pay special attention to protecting the fruit trees from absorbing the root system. When operating, try to prevent damage to the root system. Pay special attention to not hurt large roots. The method of fertilization is best for multi-acupoint application, with a depth of 25 to 30 cm, and a large area of ​​contact between the fertilizer and the roots of the fruit trees as much as possible to give full play to the fertilizer effect and increase the utilization rate of the fertilizer.

Foliar fertilizer can also be applied. The preparation method of the "Zezhong 28" fertilizer spray fertilizer solution is: 10 pounds of "Zhezhong 28" fertilizer + 50 pounds of clean water + 2 pounds of vinegar, soaked in a non-metallic container for three days, stirring 2 or 3 times a day, Spray the supernatant and add 50 pounds of clear water. A single fertilizer can be continuously leached 5 times, after which only the same fresh water and vinegar are added. Fertilizers can be used in conjunction with acidic pesticides or urea, and are usually applied every 7 to 10 days.

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