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Techniques of Growing Rambutan Trees for Many Fruits

Rambutan is grown in many tropical areas. In addition to being eaten fresh, rambutan also has an export value that brings high economic income. In order for rambutan to produce high quality and yield, gardeners need to have complete knowledge about plants. In today’s post we will send you guys Rambutan planting techniques for best results.

Density and distance of rambutan planting

Planting density is 250 trees/ha, planting distance is 6.5 * 6.0 m.

Normally, each hectare of land will grow about 250 rambutan trees
Normally, each hectare of land will grow about 250 rambutan trees

Prepare the planting hole

The planting hole is 80 * 80 cm square, 75 cm deep. When digging a hole, it is advisable to separate the top layer (up to 30cm of soil) to one side and the soil in the lower layer to one side.

The amount of manure for each hole: 10kg of organic manure or manure, 200-300 g of Super Lan, evenly spread with the surrounding ground.

In the old gardens, trees were planted using 50g Basudin 10H and 0.4-0.6 kg lime mixed with the mixture of surface + manure to fill the pit.

Then water well (or have at least 2 to 3 rains) for the soil mixture + to decompose quickly.

In well-drained places such as Basalt red soil, sandy loam soil only needs to be filled in so that after watering, the soil will sink to the lake surface, about 10-15cm lower than normal ground. For poorly drained soils, it is necessary to fill with soil 10-15cm higher than the pit surface after watering. The soil subsides with the natural ground.

The planting hole must be prepared 20-30 days before planting.

Plant tree

Use a hoe to dig a small hole in the middle of the plant about 2-3 cm deeper than the height of the seedling bag. Then use fungicides such as: Dithane M-45, Mancozerb … spray thoroughly into the planting hole, the dosage according to the instructions on the package.

Leave the bag on the ground, use a sharp knife to cut a line around the plastic bag, 2-3cm from the bottom, peel off the bottom of the bag. Examine the roots, cut off all the taproots and rootlets from the potting soil, then put the plant in the planting hole.

Use a knife to make a straight line from top to bottom and peel off the plastic bag.

Then use your hands to cultivate the soil and gently press around the base, do not use your feet to step on the ground. Then make a tub for the tree, with a diameter of 1-1.2 m, so that the base of the rambutan is higher than the top soil of the basin to avoid the root being soaked in water (turtle shape). If the seedling has grown and has a main stem, cut off the top with sharp scissors, leaving only the height from the ground to about 60 cm or 70 cm.

After planting, use 30 cc Bayfolan or HVP-801 for 1 8-liter bottle (dosage according to the instructions on the medicine bottle), spray heavily on the entire stem and leaves. The purpose is to help plants have enough nutrients and necessary microelements when the soil is not easy to touch.

Seedlings need to be planted according to the correct procedure to ensure high survival
Seedlings need to be planted according to the correct procedure to ensure high survival

After planting, it is necessary to take the stakes and tie the branches to the stakes to avoid the wind from shaking the roots. After that, it is mandatory to use coconut boats to cover the energy from the East and West, if there is a strong wind, cover it in the direction the wind blows. It is recommended to use coconut vessels for easy air circulation (covering time is about 60 days). After planting, the plants must be watered immediately, each tree is 25-20 liters.

Take care

Watering immediately after planting, planting at the beginning or middle of the rainy season will save watering work. If planted in the dry season, it must be watered regularly for at least the first 1 month. However, planting in flooded conditions, scum, or too much watering can easily lead to root degeneration, so we should consider watering when necessary.

Rambutan has a high demand for N and K. When there is a lack of K, the plant suffers from dry blight disease. Fertilizers for rambutan can be applied as follows:

1st year: After planting, fertilize once every 1-1.5 months, fertilize each root with 50-100 g of NPK (15:15:15), spray additional micronutrient fertilizers such as number one or Fetrilon -combi according to the dose instructions, the purpose is to help the plant get enough nutrients and micronutrients when the soil is not easy to touch.

NPK fertilizer should be diluted with water using a watering can around the base or evenly distributed around the base and covered with a thin layer of soil on top. After each spraying or watering, the distance of 5-10 cm from the root will create conditions for the roots to reach far, the tree will grow quickly and limit falling when there is wind.

2nd year: amount of fertilizer for one root: 100g N+50g K2O (200g urea+80g KCl). Divide into 2 times to fertilize at the beginning and end of the rainy season.

The third year: the tree begins to bear fruit, the amount of fertilizer for a tree is: 1.5 NPK fertilizer in the ratio 2:1:2. Divide and fertilize 2 times before flowering and after harvesting.

4th year: The amount of fertilizer increased from the previous year by 0.5-1.0 kg/tree. Keep the NPK ratio at 2:1:2. Divide into 4 times to fertilize:

+ First time: after harvesting the fruit, pruning, applying all phosphorus, 1/3N and 1/3 K2O.

+ Second time: before blooming: apply 1/3N.

+ 3rd time: when the fruit is 1-2cm in diameter. Apply 1/3 N and 1/3 K2O.

+ 4th time: 1 month before harvest: Apply 1/3 potassium.

– In the following years, to ensure stable fruit trees, the amount of fertilizer is gradually increased: 2-3 kg of NPK for a tree in 1 year and 10-30 kg of manure.

With a yield of 7.3 tons/ha, rambutan removed from the soil: 1.5kg N, 2kg P2O5; 11.7kg K2O; 5.9kg Ca; 2.7kg Mg per 1ha. Therefore, it is necessary to fertilize rambutan annually to ensure stable fruit yield for many years.

The amount of fertilizer for rambutan trees through each stage is different
The amount of fertilizer for rambutan trees through each stage is different

Care for plants to flower

After the previous harvest, prune completely the flowers that have given fruit, cut off dry branches, overshoots, apply chemical fertilizers and organic fertilizers to quickly recover. When the second wave of buds is completely old, proceed to squeeze the water to make cotton, squeeze the water until the leaves are slightly wilted, observe on the top sprouts to shrink like the tip of a matchstick, start watering, the amount of water is 2/3 normal amount of water, wait about 4-6 days to monitor peak sprouts.

If the top sprouts spread out in a straight line, the leaves are short, when watering, they will flower.

If you see the sprouts spreading and growing well, when watering, they will produce young leaves. In this case, we stop watering and monitor 7-10 days to see the flowers show clearly, we continue to water. If the leaves are young, we stop watering, after 10-15 days the young leaves will fall, now we water the plants again to flower.

The care largely determines the flowering ability of the rambutan tree
The care largely determines the flowering ability of the rambutan tree

After the flowers are clear, water regularly, continuously and regularly to ensure enough water for the plant. Additional cabinet materials such as straw can be used to reduce moisture on the surface of the tub and enhance moisture retention for plants.

In addition to fertilizing through the root route, it is necessary to spray more Basfoliar or calcium-nitrate to supplement protein, calcium and some micronutrients such as Mg2+, Zn2+, Bo…, spray 2-3 times, 15 days apart each time to prevent fruit cracking caused by lack of calcium and microelements. Rambutan is characterized by thin skin, high edible rate, so it is easy to crack fruit during rice production, so spraying calcium and microelements is very necessary.

In addition to fertilizers, farmers also pay attention to spray more preventive drugs to increase the resistance of plants
In addition to fertilizers, farmers also pay attention to spray more preventive drugs to increase the resistance of plants

AgriSearch.net very happy to share with farmers information about rambutan growing techniques. Hopefully the content of this article will help you have more experience to take care of your rambutan garden.

Emilia Chaney
Emilia Chaneyhttps://agrisearch.net
My name is Emilia Chaney. I'm a social girl from Romania with a big smile and 3 passions: Agriculture, Travel and Social Media. I try to make this blog practical, full of great advice and inspiring ideas.

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