Cabbage is also called cabbage, lotus white, rutabaga and so on. In recent years, more and more vegetable farmers have begun to cultivate cabbage off-season through protected areas. The cabbage planted in this way has fewer pests and good quality, and vegetable farmers can obtain higher benefits. There are mainly plastic sheds (small arch sheds, middle sheds, large sheds) and solar greenhouses used for the cultivation of protected cabbage. Different types of cabbage are suitable for different cultivation modes. Plastic greenhouse cultivation The cabbage cultivation areas in plastic sheds are mainly located in Luoyang, Henan, Xi'an, Shaanxi, and Yuncheng, Shanxi. According to the climatic conditions and types of facilities in different regions, it can be arranged for the postponement of autumn (harvest from November to December). Sunlight greenhouse cultivation A reasonable and efficient annual rotation and intercropping cultivation mode can be selected according to local climate conditions and greenhouse performance to improve land utilization and output value. Cabbage varieties cultivated in a solar greenhouse should have the advantages of good yield and bright green ball color. In addition, the varieties are particularly required to be resistant to low temperature and weak light, and have a short growth period, so that they can be harvested as soon as possible so as not to affect the next crop. It is recommended to select excellent early-maturing varieties such as Zhonggan 8398, Zhonggan 56, and Zhonggan 26. These varieties can fully adapt to the low temperature and low light conditions of solar greenhouse cultivation, and provide a guarantee for increasing the income of vegetable farmers. Disclaimer: Some articles on this website are transferred from the Internet. If the legal rights of a third party are involved, please inform this website for processing. phone
Melanin is a protein that exists in the basal layer of everyone` s skin. The exposure to ultraviolet radiation can cause changes in melanin, generating a substance that protects the skin. Then, melanin moves through the layers of cellular metabolism and reaches the epidermis of the skin, resulting in skin problems such as pigmentation and uneven skin color.
(1) The first step of whitening is to inhibit melanin production.
Melanin is the most important type of pigment that affects skin whiteness, and inhibiting the generation of melanin is the most important ultimate goal of whitening products.
(2) The second step of whitening is to block melanin transport.
After melanin is generated within melanocytes, melanosomes are transported along the dendritic processes of melanocytes to the surrounding keratinocytes, affecting skin color.
(3)The third step of whitening, stripping.
By softening the stratum corneum, these substances accelerate the shedding of dead cells in the stratum corneum and promote the metabolism of the epidermis, so that the melanosomes entering the epidermis fall off with the rapid renewal of the epidermis during metabolism process, thereby reducing its impact on skin color.
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