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The variety has wide adaptability, rapid growth, early results and high yield. Planted in March that year, the next year each fruit can produce 2-3 kilograms, the third year fruit production can reach 20 kilograms or more, single fruit weight 80-120 grams, skin black purple, yellow flesh, juicy sweet taste , Sugar content above 13 degrees, excellent quality, edible rate of 95% or more, in Guangdong Guangdong northern Guangdong fruit ripening period from the end of May to early June, the current market price of the Guangzhou market stable at 8 yuan / kg or more, Is a worthwhile development of fruit varieties, with a wide market prospects. The main points of suitable cultivation environment and main cultivation techniques are described below:
First, suitable for planting areas:
The species is not afraid of heat afraid of freezing, winter temperature in the case of -28.3 °C without frost damage. However, the high temperatures in winter show inefficient results. According to the results of the survey, the introduction of the results is only suitable for the areas with frost in winter, otherwise the results will be insignificant or the yield will be low.
Second, the main cultivation techniques:
1. Selection of land: Li Shu has strong adaptability, and can be planted on slopes and flat lands. It is best to choose land with deep soil, good drainage, and sunny backsliding.
2. Planting specifications: It is recommended to use 43 meters or 3.53.5 meters, that is, about 60 acres planted.
3. Planting time: spring and autumn planting can be, autumn planting time is 11-12 months, with spring planting as well.
4. Planting requirements: (1) Digging must be planted and basal fertilizer must be applied. (2) Pollination trees within the orchard should not be less than 10%. It is recommended that American red plums be used as pollination trees. Since most varieties of plum trees are self-contained, they can increase yield.
5. Field Management:
(A) Fertilization: The young tree is dominated by nitrogenous shoots. Before spring and summer shoots sprout, urea or decomposed manure can be applied to promote shoot growth.
(B) Result tree fertilization: The first application of flowering fertilizer is applied 10 days before budding, and the second application of strong fruit fertilizer is performed. In the rapid expansion of small fruit, the first and second fertilization use nitrogen, Phosphorus, potassium fertilizer-based. The third fertilization, after the fruit is applied, is dominated by organic fertilizers such as peanut bran and chicken manure. Plus a small amount of urea, the fourth time in the winter, combined with deep-turning to improve the soil, digging points apply a variety of organic fertilizer, soil miscellaneous fertilizer.
(2) Shaping, trimming
A. Juvenile tree shaping, pruning: The shaping of the juvenile tree is usually a natural happy shape, that is, it is dried in the first year after colonization, and is truncated at 60-80 cm from the ground, and 3-4 branches are selected from the branches that were sprouted in the current year. As the main branch, when the main branch is 50-60 centimeters long, it should be shortened. When it is short, care should be taken to cut outwards. After constant pruning and shaping, the tree shape is basically formed.
B, the results of tree pruning; Li to short fruit branches and the results of the results of the main branch of the results, so the results of tree pruning should be appropriate to form a short fruit branch and a bouquet of fruit as a goal, should be based on age, tree vigor and other conditions to trim. Moderate short cuts and thinning of long and middle fruiting branches. One-meter or more long fruiting branches should be about 1/3 shorter, and the middle fruiting branch should be 1/2 short. For short-fruiting branches and bouquet-shaped fruiting branches, they should not be cut short, and only suitable for removing excessively dense branches; for dead branches, diseases and pests, etc. Pendulous branches and slender twigs should be cut in time to ensure good light, reduce nutrient consumption and spread of diseases and insects.
(3) Diseases and Insect Pests The main diseases of Li are: flow gum disease, anthrax, and black spot disease. Prevention and control methods: The main problems of fluid injection are prevention, timely control of pests, reduction of wounds, prevention of mechanical damage, whitening of trunks in winter, etc.; prevention and treatment can use antiseptic drugs such as anthrax, carbendazim and thiophanate-methyl. Insect pests mainly include: aphids, scale insects, and red neck beetles. Control methods include: 1 Clearing the garden in winter, burning the egg branches, and reducing the insects in the following year. 2 The use of insecticides such as trichlorfon and imidacloprid during the leaf development period and flowering period can all have good results.
American black and red plum cultivation techniques
"U.S. black Lee" is named differently from place to place. Some places are called black rose plums, and some are called black amber plum, black brown, black li, and beautiful li. Because the species was introduced from the United States, the color of the fruit is purple-black. We call it the American black plum.