Rambutan (Nephelium lappaceum) is a tropical tree which belongs to the Sapindaceae family and also the fruit of this tree. This tree does not grow very tall, but it produces an ample harvest. Rambutan is widely distributed throughout Indonesia, Malaysia and Southeast Asia. It is also identified in some countries, by different names, for example, in Nicargua, Costa Rica and Panama, Rambutan is identified as mamon chino while Thailand people call it ngoh. The common color of Rambutan is red, but the fruit of this particular type is yellowish. The hairy skin of the Rambutan fruit is removed to get to the whitish or pinky edible parts. They typically taste sweet though some are sour as well as sweet.
The Rambutan tree grows to about 10 to 20 m in height. Its alternate leaves are 10 to 30 cm in length and pinnate and have three to eleven leaflets, each with an entire margin about 5 to 15 cm in width and 3 to 10 cm in breadth. Petal-less small flowers which are about 2 1/2 to 5 mm in size are disk-shape and they bloom cluster wise. The shape of Rambutan fruit is round or oval and it is about three to six cm by three to four cm in dimension.
Rambutan is borne in clusters, and about 10 to 20 Rambutan fruit can be seen. Its leather like skin has pliable thorns. Rambutan fruit is typically red though some are yellow or orange. ‘Rambut’ is a Malay word that means ‘hairs’, hence it gets its name because of the thorn like appearance of its fruits. Its brownish seed is about two to three cm in size and is basally scarred. It is soft and crunchy. Although the raw seeds are poisonous, they may be eaten after cooking.
Uses and benefits for healthy
Rambutan is a tasty fruit and it is very popular in many countries. Seed oil from the Rambutan is produced and in use to manufacture candles and soap. Although Rambutan trees are cut down rarely, their wood is used in the construction industry. Rambutan fruit is said to heal dysentery and diarrhea effectively. The leaves are also used as cataplasm to cure headaches. In Malaysia, the skin of the Rambutan fruit is used to prepare native medicines. Further, the roots of Rambutan trees are boiled and used as a medication to cure fever.
According to some researches, Rambutan fruit is rich in following components: Fat, Calcium, Iron, Protein, Nitrogen, Ash, Sodium, Zinc, Magnesium, Manganese, Potassium, Phosphorus, pH, Vitamin C, Vitamin A, Thiamin, Riboflavin, Fiber. Eating five fruit in a day can seriously decrease the chance of cancer. Rambutan fruit is also very effective in lowering blood pressure.
There are some important benefits of Rambutan to healthy, such as:
1. For every 100 grams of Rambutan Diet contains 84 calories. If you follow a 2,000-calorie diet program, Rambutan has donated 4.2 percent of daily calories you need. The amount of heat needed by the body varies as it depends on your weight, lifestyle, gender, and age.
2. Rambutan fruit is rich in sugar, mostly fructose and sucrose, but less calories, only around 60 in a fruit. Rambutan fruit is abundant with vitamin C and has potassium, iron, beta carotene or vitamin A, and a little calcium, magnesium, sodium, niacin, fiber and protein.
3. The fruit has been employed in traditional medicine in Malaysia and Indonesia for hundreds of years as a treatment for diabetes, hypertension and various ailments. Besides the antioxidants obtained in its beta carotene and vitamin C, research workers at the Chiang Mai University in Thailand found that the Rambutan pulp, seeds and skin have strong, plant based, antioxidants called flavonoids. Certain kinds of flavonoids are believed to reduce cholesterol and possess anti-cancerous, anti-inflammatory attributes.
4. For macronutrient, Rambutan fruit is known as a very low-fat. Most of which are owned by Rambutan calories come from carbohydrates. Institute of Medicine recommends 130 grams of Rambutan for your daily consumption.
5. For every 100 grams of Vitamin, Rambutan contains about 40 percent of the daily intake of vitamin C is needed by the body. In addition, Rambutan meat also contains about 1 percent commonly known as niacin or vitamin B3.
6. This fruit is very rich in iron, needed to control the oxygen levels in our body. Iron helps prevent fatigue and dizziness caused by anemia.
6. The fruit also has small quantities of copper, necessary for the creation of white and red blood cells, and also manganese, which our body needs to produce and activate some enzymes.
7. Some people also use it as a fever remedy. Kill intestinal parasites and reduce symptoms of diarrhea.
In some countries, the Rambutan tree is very common in gardens. They are also grown in medium sized estates for trading. Although Rambutan are widely seen in Southeast Asian countries, Sri Lanka, Ecuador, India, Indonesia, Malaysia, Philippines, Thailand, the Caribbean, Africa, Cambodia and Central America are also main countries for Rambutan plantations. It is one of the fruits that give out massive harvest in Hawaii as well. Rambutan trees are genetically male or female. Although female Rambutan trees are only with female flowers, the male Rambutan tree has both flowers although female blooms are less.
Fragrance of Rambutan flowers entices insects. Mostly, bees can be seen around Rambutan flowers. Many types of butterflies, flies and other types of insects extract a great quantity of honey thus fertilizing them. Since the female flowers lack pollen, they need cross pollinations to be fertilized. Although some cultivars are apomixes, Rambutan mostly depends on insects to be pollinated.
From the selected clones, a range of cultivars has been produced up to now. Some of them are highly suitable for harvesting and they are only three to five m in height which makes them easier to be cultivated. Seeds of Rambutan are now available that are developed to bear both the female and male flowers equally well. After removing the fleshy fruit, seeds are thoroughly washed before planting. It will take about nine to 25 days for sprouting. Seedlings give results after five to six years but genetic wise the duration may change. Patch budding is an effective way to propagate Rambutan trees. In this method, one and half month old seedlings are taken and planted in one quart cans with enough manure. Thereafter they are transferred to large containers and this type of trees produces flowers within three years after they are planted out in orchards.