How to grow carambola for high yields? A detailed explanation of the key cultivation techniques
Carambola, also called wu lian zi or yang tao, is an evergreen small tree that can reach 8-12 m in height. It is a common fruit in tropical and subtropical regions, with extremely high nutritional value and excellent taste, and is deeply loved by consumers. We have all eaten it, but do you know how it is grown? How can it be grown to achieve high yields? Let's take a look at the high-yield carambola cultivation techniques below on QinNongNet.
1. Orchard establishment and planting
Select high-yielding, highly adaptable, disease-resistant quality variety saplings, then choose a site for the orchard that is open, flat, sunny, with deep soil, loose and fertile, and good drainage. Planting can be done in spring and autumn, when the temperature is favorable for sapling growth and development. When planting, pay attention to planting density, generally about 20-25 plants per mu. Use the pit planting method: first dig large pits 1 m long, wide, and deep, place base fertilizer in the pit, backfill a layer of soil, then add base fertilizer again, follow this sequence, and finally fill the pit with topsoil mixed with lime powder and compact it. When planting, the mound should be 20-30 cm above the soil layer, and after planting, water thoroughly at the roots.
2. Fertilizer and water management
About 2-3 months after the young trees are planted, the roots will have grown throughout the entire planting pit. At this time, appropriate pit expansion should be carried out to allow further root growth and development. About one month after the young trees survive planting, topdressing should begin to promote rapid growth. At the start of fertilization, the principle is to apply light fertilizer frequently to prevent damage to the roots; early fertilization should mainly use light fertilizer. After two months, apply an appropriate amount of farmyard manure or compound organic fertilizer to provide the trace elements needed for plant growth and prevent malnutrition.
Fertilization should stop in November, and winter fertilizer should be applied in December so the young trees can overwinter safely. In the following spring, organic fertilizer should be applied to improve soil fertility. Watering can be done according to rainfall and soil dryness; if natural rainfall can meet the needs of planting and growth, there is no need to water, but in areas with less rainfall, artificial watering should be supplemented according to soil conditions. In addition, after each fertilization, some water can also be applied appropriately to dilute and infiltrate the fertilizer, which helps the plant absorb it.
3. Shaping and pruning
When the young trees grow to 50-60 cm, they should be shaped and pruned. Cut off the branch tips and keep 3-4 small buds to grow into main branches. When the branches grow to 50 cm, pinch off the growing tips, which can promote branching and budding. The branches should then keep 3-4 lateral buds, allowing them to grow freely into a round canopy. Mature trees should also be pruned, generally twice a year. The first time is after fruit harvest in spring, cutting off excessive water shoots, weak branches, and old dead branches to avoid excessive nutrient consumption, accumulate nutrients for the next flowering and fruiting, and also help new shoots emerge and flower buds sprout. The second time is in summer, when dense branches and excessive water shoots are cut off to increase light and ventilation and raise yield.
4. Pest and disease control
The most important thing when growing carambola is pest and disease prevention. There are many kinds of pests and diseases affecting carambola, including those harmful to leaves, flowers, and fruit, but they all affect carambola growth and yield. In severe cases, they can cause total crop failure or plant death, bringing huge losses to fruit growers, so special attention is needed.
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