From which dynasty did tobacco enter China?

Tobacco entered China in the Ming Dynasty;

Native to South America. China is widely cultivated in northern and southern provinces. Tobacco is a thermophilic crop and is sensitive to temperature. Different temperature conditions have great influence on the quality and yield of tobacco. The temperature requirement of high-quality tobacco leaves in the growth period is lower in the early stage and higher in the later stage.

As a raw material for tobacco industry; The whole plant can also be used as an insecticide; It can also be used as anesthetic, antiperspirant, sedative and emetic in medicine.

growing environment

Tobacco is a thermophilic crop and is sensitive to temperature. Different temperature conditions have great influence on the quality and yield of tobacco. The temperature requirement of high-quality tobacco leaves in the growth period is lower in the early stage and higher in the later stage. When the average temperature of the day is higher than 35℃, the growth of tobacco plants is inhibited, the leaves become thicker and harder, the nicotine content is too high, and the quality becomes worse. Low temperature can promote the early development of tobacco plants, but different varieties have different responses to low temperature.

The temperature below 13℃ is generally not desirable, especially in humid weather without light. Under the good growth conditions of sufficient sunshine and average daily temperature of about 27℃, tobacco ripens in 80-90 days after transplanting; In cold weather, it takes 100- 120 days to mature. Insufficient light will lead to the slow growth of tobacco, and the leaves can hardly mature normally, resulting in inferior tobacco leaves. Middle and late stage of field growth;

When the daily average temperature is lower than 20℃, the transformation and accumulation of assimilates will be inhibited, thus hindering the normal maturity of tobacco leaves. The lower the temperature, the worse the quality of tobacco leaves, such as frost leaves caused by early frost in the late growth stage, which will be of no use value.