1, the establishment of the new park. Hills, slopes, terraces and flat land can all be cultivated. It is best to choose a place where the terrain is high and dry, and there is no water. The flat land should be planted with deep ditches and high ridges. Avoid mixing with pear trees.
2. Planting density. It can be planted after defoliation or in mid-March, with row spacing of 2m× 3m or 3m× 3m and 74 ~ 1 10 plants per mu. Sufficient organic fertilizer should be applied in the planting hole. When planting, pollinated trees should be planted at the ratio of 8∶ 1
3. Fertilizer and water management. The principle of fertilization is to apply thin fertilizer frequently, and it is appropriate to apply thin human excrement and urine; In addition, it can be combined with drought-resistant water at ordinary times, and 0.5 kg of urea can be added for irrigation per 100 kg of water. Sufficient base fertilizer should be applied after harvest, and the application amount of base fertilizer should account for 60% of the annual fertilization amount. Green manure can be interplanted between rows to improve the soil.
4. pruning method. American black plums grow vigorously and the trees stand upright. Winter pruning should be based on the principle of light cutting, long putting and open angle, and it is not advisable to cut your head again. In addition to the extension and short cutting of main branches, dense branches are generally used for thinning, light cutting and slow release. By pulling branches to increase the angle, high branches generally require 45 ~ 50 degrees, and lateral branches and branches 60 ~ 70 degrees. Pruning should be carried out in summer during the growing period, and the pruning methods are as follows: (1) using the method of removing the heart to inhibit the apical dominance, promote the secondary branches, increase the foliage branches and bouquet-shaped fruiting branches, and promote flowering; (2) thinning the flourishing branches and competing branches on the back, and cutting them twice in May and June if you want to use them; (3) girdling or girdling lush trees to promote flowering.
5. Raise flowers and fruits. When the number of flowers is 1/3, the mixture of potassium dihydrogen phosphate, urea and borax is 600 times, and then sprayed outside the roots, and sprayed again after 7 days.