What kind of fertilizer is good for apple tree base fertilizer (base fertilizer application method)

Apple tree fertilizer selection

Generally speaking, it is better to apply base fertilizer to apple trees in mid-September to mid-October in autumn. The earlier the better. The effect of applying base fertilizer in autumn is better than that in spring, and applying it in early autumn is better than that in late autumn or winter.

The base fertilizer for apple trees should be mainly organic fertilizer, which can provide the tree with a variety of nutrients for a long time. Organic fertilizer must be fully decomposed before it can be used on crops.

How to apply base fertilizer to apple trees

It is recommended to use the ring ditch fertilization method to apply base fertilizer to young apple trees. Generally, the ditch width is 50~60 cm and the ditch depth is 60~80 cm. Then, fertilization should be expanded outward every subsequent year.

If it is a mature apple tree, it is best to use strip trenches or radial trenches to apply base fertilizer. Generally, the trench width and depth are 50 to 60 cm. The above methods should be alternated and rotated every other year.

How much base fertilizer should be applied to apple trees?

1. If the amount of basal fertilizer is calculated according to the age of the tree, more than 1,000 kg of organic fertilizer, 25 to 50 kg of superphosphate, and 5 to 10 kg of urea should be applied per mu for young trees.

2. If it is a first-fruit tree, usually 1500~2000 kg of organic fertilizer, 50~75 kg of superphosphate, and about 15~20 kg of urea are required per mu.

3. If it is a mature fruit tree, it is best to apply more than 4,000 kg of organic fertilizer, 150-180 kg of superphosphate, and 40-50 kg of urea per mu.

How to apply base fertilizer to apple trees

Apple trees generally need top dressing three times a year. The first top dressing is before and after the plants sprout, and the fertilizer is mainly nitrogen fertilizer. The second top dressing is usually during the flower bud differentiation and fruit enlargement period of the apple trees, and the fertilizer is mainly phosphorus and potassium fertilizer, a mixture of nitrogen, phosphorus and potassium. The third time is in the late growth stage of the plant and fruit, and the fertilizer is mainly potassium fertilizer.