Is Black Brin a Plum? Detailed Explanation of Black Brin Planting Techniques

AbstractBlack Brin is a plum. It can generally be planted on hills, slopes, terraces and flat land. 74-110 plants can be planted per mu, with an appropriate amount of organic fertilizer applied, and then pollinator trees are planted at a ratio of 8:1. During the growing period, an appropriate amount of human excrement and urine, urea, potassium dihydrogen phosphate, borax, etc. can be applied. In summer and winter, branches that are too dense should be pruned, which helps promote flowering and fruiting of the fruit trees.

I. Is Black Brin a Plum?

1. Black Brin is a plum. Its name comes from a free translation of the English “black plum&rdquo, that is, black plum. In Chinese-speaking regions such as China's Hong Kong and Taiwan regions and Southeast Asia, plum is generally transliterated as “&rdquo, so this fruit is translated as Black Brin.

2. However, in some places it is also translated as Black Brown, or black plum, black rose plum, etc. Because it was introduced from the United States and the fruit color is purple-black, it is also called American black plum or American plum.

3. The peel of Black Brin is purple-black, and the flesh is yellow, juicy and sweet. The sugar content is as high as above 13°, the quality is relatively good, and the edible rate is as high as above 95%. The fruit generally matures from early June to mid-to-late June.

II. Black Brin Planting Techniques

1. Establish a new orchard

It can generally be planted on hills, slopes, terraces and flat land. A place with high terrain, dryness and no water accumulation can be selected for planting. When planting on flat land, deep furrows and high beds should be made, and it should not be planted together with pear trees.

2. Planting density

Planting can be carried out after leaf fall or in early-to-mid March. With a plant spacing and row spacing of 2 m × 3 m, or 3 m × 3 m, 74-110 plants can be planted per mu. Then sufficient organic fertilizer is applied in the planting holes. When planting, pollinator trees need to be planted at a ratio of 8:1.

3. Fertilizer and water management

(1) During the growing period, it is suitable to apply thin fertilizer frequently, mainly by watering with dilute human excrement and urine. At the same time, watering can be combined with drought resistance. For every 100 kg of water, 0.5 kg of urea can be added before watering.

(2) After harvest, sufficient base fertilizer needs to be applied. The amount of base fertilizer applied should account for about 60% of the annual fertilizer application. Green manure can be intercropped between rows, which helps improve the soil environment.

4. Pruning methods

(1) American black plum grows relatively vigorously and the tree posture is upright. In winter pruning, the principles are generally light pruning and long release, and opening the angle. Heavy cutting and random heading back should not be used. In addition to short cutting of scaffold branches and extension branches, the main practices are usually thinning dense branches and light pruning with delayed release. The branch-pulling method can be used to increase the angle. High branches require 45-50 degrees, while side branches and branch groups require 60-70 degrees.

(2) During the growth process, pruning should also be carried out in summer. Generally, pinching can be used to inhibit apical dominance, and then promote the growth of secondary branches, which helps increase leaf cluster branches and bouquet-like fruiting branches and promotes flower formation. At the same time, vigorous branches on the back and competitive branches should also be thinned out. If they are to be used, they can be heavily short-cut twice in May-June. For vigorously growing trees, girdling or ringing should be carried out, which helps promote flowering and fruiting.

5. Protecting flowers and fruits

When the flowers of the fruit trees have fallen to 1/3, potassium dihydrogen phosphate plus borax plus urea can be used, each as a 600-fold solution mixed together for foliar spraying. Then, after 7 days, spray once more.