From the characteristics of pericarp:

1, orange peel is thin and the easiest to peel;

2. The orange peel is thick, and peeling is slightly difficult;

3. The orange peel is smooth, and the peel is closely connected with the pulp, which is the most difficult to peel.

In order to facilitate the distinction, oranges, oranges and oranges have the following characteristics:

1, Citrus: It is the mature fruit of many citrus such as Rutaceae. The fruit is large, nearly spherical, with yellow skin, orange yellow or orange red, thick skin, thick sponge layer, loose texture, slightly difficult to peel, and oval seeds. Moderate sweet and sour, resistant to storage.

2. Oranges: Oranges are mature fruits of many kinds of oranges, such as Fuju or Juju of Rutaceae. There are many kinds, including Babu Orange, Money Orange, Sweet Orange, Lime, Miyagawa Orange, Xinjin Orange, Zhangwei Orange, Wenzhou Orange, Sichuan Orange and so on. The fruit is small, usually oblate, and the peel is orange red, vermilion or orange yellow. The pericarp is thin and loose, the sponge layer is thin, tough and easy to peel, and there are 7 to 1 1 cysts. It tastes sweet or sour, and the seeds are thin and not resistant to storage.

3. Oranges refer to a group of plants under Rutaceae, Citrinae, Citrus and Citrinae. Varieties are golden orange, navel orange and so on. Common mainly refers to sweet orange. Zhongyu No.7 sweet orange is a new seedless, high-quality, high-yield, storable, fresh and processed (juice-making) sweet orange variety bred by Citrus Institute of Chinese Academy of Agricultural Sciences. The fruit is round or rectangular, the peel is smooth and thin, and the capsule is compact, so it is not easy to peel. The meat is moderately sweet and sour, and the aroma is overflowing.

Extended data:

Vitamin A in oranges can also enhance people's vision in dark environment and treat night blindness. Oranges should not be eaten more. If you eat too much, you will get carotene, and your skin will be dark yellow, just like jaundice. If you eat too many oranges and your palms turn yellow, as long as you stop eating for a while, your skin color will gradually return to normal. In the Ming Dynasty, Zhang's uncle Zhang had a soft spot for oranges. The report said that he "likes oranges, oranges are ripe, and there is nothing but oranges. If you don't publish it yourself, you will lose your life and strip it. " When you eat them, your hands and feet are yellow.

Citrus is the mature fruit of many citrus plants, such as Rutaceae, Camellia sinensis or Ponkan. Its main functions are promoting fluid production, quenching thirst, moistening dryness, harmonizing stomach, inducing diuresis and sobering up. Indications: chest heat, dry mouth or alcoholism, anorexia, adverse qi flow and dysuria.

The growth, development, flowering and fruiting of citrus are closely related to environmental conditions such as temperature, sunshine, moisture (humidity), soil, wind, altitude, topography and slope direction, among which the temperature has the greatest influence. Even if the temperature is different, sometimes there will be completely different results.

The optimum temperature for citrus growth is 37℃. When flower buds differentiate in autumn, the temperature of day and night is required to be about 20℃ and 10℃ respectively. Too low a temperature will freeze oranges. In addition, oranges are shade-tolerant trees, but good sunshine is needed for high quality and high yield. Generally, areas with annual sunshine hours 1200 ~ 2200 hours can grow normally.

The cultivation of oranges has a long history, because its peel contains aromatic smell, and the ancients used it instead of incense. The seeds of this genus are found in the Western Han tombs unearthed in Mawangdui, a suburb of Changsha, Hunan.

According to textual research, it is considered to be the seed of orange-rough and slightly angular, and its color has turned gray-black-and it is considered to be one of the materials used to burn incense and bury and preserve the integrity of the body. Those seeds and other similar things are placed in the west of the coffin hole, while the food is placed in the east.

References:

Orange-Baidu Encyclopedia, Orange-Baidu Encyclopedia, Orange-Baidu Encyclopedia