1, flower bud pruning
The pruning method of flower buds is mainly aimed at blueberry trees in small seedling stage. The purpose is to increase the number of branches, expand the crown width of blueberry trees, and at the same time leave nutrients in the roots temporarily, so as to promote the development and expansion of roots and adjust the shape of their fruit trees.
2. Thinning and pruning
This pruning method is suitable for mature blueberry trees. The purpose is to control the height of trees and improve the light conditions of trees. Pruning those dense, diseased and damaged branches, in general, means removing those weak branches, leaving healthy and strong branches, so that fruit trees can grow in a balanced way.
3, the old tree update pruning
Generally, blueberry trees have been planted for about 20 years, and the branches hanging down or close to the ground are basically aging, so they need to be completely sawed off, so that the saws can sprout new branches close to the trunk and give the trees new life.
Matters needing attention in planting blueberry trees
1, select the appropriate variety. There are early-maturing, middle-maturing and late-maturing varieties of blueberry, so it is necessary to choose suitable varieties according to local climatic conditions to ensure normal fruit. In addition, it is also important to choose varieties that are resistant to pests and diseases.
2. Choose good soil. The best soil for blueberry growth is acidic and fertile sandy soil or sandy loam, and the pH value is between 4 and 5. The soil should be loose, well drained and not too wet. If the soil conditions are not ideal, potted blueberries can be used.
3. The planting density is suitable. There should be a distance of 1-2 meters between blueberries, leaving enough lighting and ventilation space. Especially in wet and rainy environment, increasing planting density properly is beneficial to the prevention and control of pests and diseases.
4. Appropriate fertilization. Blueberries have a great demand for nitrogen and phosphorus fertilizers, but excessive fertilization must be avoided to prevent root burns and pests. Generally speaking, 3-5 kg of organic fertilizer and 5- 10 kg of chemical fertilizer can meet the demand every year.