The premature picking of Chinese cabbage seriously affects the yield. The reason is that the seedlings of cabbage are affected by low temperature, and they are caused by flower buds through vernalization. There are three conditions for the cabbage to pass through the vernalization stage. First, the seedlings have a certain size, and the early maturing varieties reach three leaf stems. When it is thicker than 0.6 cm, it may be convulsed by vernalization. The second is that the seedlings are at a low temperature of 0-10 degrees for a long time, especially at a low temperature of 4-5 degrees. The third is to go through vernalization after a certain period of time, generally 30-45 days. It can be seen that the prevention of early convulsions should be strictly controlled sowing time can not be sown early, seedling temperature can not be less than 10 degrees for a long time, followed by selection of spring cabbage varieties that are not easy to early convulsions, such as Zhong Gan 11, Zhong Gan 12, and so on. The use of greenhouse nursery, seedling age can not be too long, from the seedling stage to promote vegetative growth, the leaf ball growth faster than the growth rate of calyx, early fertilizer, timely irrigation, etc., do not control the growth due to drought to promote convulsions. Spring early maturing varieties, generally try not to seedlings.
When people was young, the human body had a good DNA damage repair mechanism, and can maintain a good cell renewal speed, in order to maintain the normal growth, development and reproduction of the body. With the increase of age, the level of DNA damage repair in human body decreased.
In addition, individual and environmental factors, such as stress and strain, injury and infection, decline of immune response, malnutrition, metabolic disorders, drug abuse, bad living habits, diseases, environmental pollution and so on, will accelerate the speed of DNA damage and reduce the level of repair.
NMN is a serious scientific research achievement that can significantly reverse aging and prolong life through rigorous scientific verification. With the deepening of research, more and more effects of NMN have been found, such as improving muscle aging, reversing hematopoietic stem cell activity, maintaining telomere length and so on.
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