How to fertilize and pull branches for apple trees

How to fertilize and branch apple trees? Please introduce in detail 1. Apple tree fertilization (1) from the outer edge of the crown, dig an annular ditch 30 cm wide and 40 cm deep (young trees) in the ground. Big trees should dig an annular ditch 50 cm wide and 60 cm deep. (2) the method of fertilizing along the ditch can be used in adult orchards. When digging ditches, the topsoil and the underlying soil should be stacked separately, and then the fertilizer and topsoil should be mixed into the ditch and then filled with the underlying soil, and should be watered in time after fertilization. (3) the amount of fertilizer applied. One year old apple tree applied 20kg base fertilizer per tree, 4 ~ 5 year old apple tree applied 40kg base fertilizer per mu, 6 ~ 10 year old apple tree applied 3000kg / mu base fertilizer per mu, and fruit trees in full fruiting period applied 4000kg / mu base fertilizer. In addition to applying base fertilizer, it is also necessary to apply phosphorus and potassium fertilizer in different periods. The amount of phosphorus and potash fertilizer per tree of different ages in the whole year: 1 kg of phosphate fertilizer and 0.2 kg of potassium fertilizer for unfruiting trees, 1.25 kg and 0.5 kg of potassium fertilizer for first fruiting trees, 5 kg of phosphate fertilizer and 2 kg of potash fertilizer for fruit trees in full fruit stage. 2. Apple trees should be reshaped and pulled from early September to early October. (1) nail the sawed stake into the ground and tie it to the stake with rope or wire on the branch. (2) the length of the lower branch of the crown is 90cm 100cm, the length of the middle branch is 70cm and 80cm, the length of the upper branch is 50cm and 60cm, and the angle of the branch should be 70 °~ 90 °. (3) remove the upper dorsal branches within 20 cm from the central trunk in time, and coring the rest of the branches. Click to get more apple tree planting techniques click to get more fruit planting techniques