What was the introduction route of high-yield crops introduced to America in Ming and Qing Dynasties?

Potatoes, sweet potatoes, and corn are all introduced to the Spanish colony-the Philippine Islands every week by Spaniards who were found in America, and then introduced to Fujian, China by immigrants from China in the Philippines, and then spread.

1492, Columbus rediscovered America, which attracted Europeans' attention to this so-called "new continent". After the success of American colonization, in the late/kloc-6th century, the Spanish established a colony in the Philippines in South Asia, and some American crops began to be introduced into the Philippines, and then spread from the Philippines to all parts of Southeast Asia and further to China. The introduction and spread of American crops became a prominent feature of crop introduction in China in Ming and Qing Dynasties.

Second, the reason: 1. When high-yield crops originating in the United States enter China on a large scale, high-yield crops such as sweet potato, corn and potato have low requirements on temperature and moisture, and can grow on barren land.

2. The Little Ice Age in Ming and Qing Dynasties caused the global temperature to drop, and plants in middle and high latitudes could grow shorter in a year. The global temperature drop also makes the temperature difference between East Asia continent and Pacific Ocean smaller in summer, and the warm and humid subtropical monsoon is difficult to penetrate into the North China Plain, which leads to not only the temperature drop, but also the serious drought. There are few lakes and rivers in North China Plain.

Most parts of the United States are hot and rainy all the year round, and these crops have high requirements for temperature and precipitation. Although China does not belong to the tropical region like the United States, these crops can also be matured due to the influence of monsoon climate and hot and rainy summer.

Extended data:

American crops were introduced into China, mostly in the Ming and Qing Dynasties.

Among them, there are important food crops such as corn, sweet potato and potato, as well as oil crops such as peanuts and sunflowers. There are more than 20 kinds of fruits and vegetables, such as tomatoes, peppers, kidney beans, guava and annona, as well as amateur crops such as tobacco and upland cotton (American cotton).

It has achieved rapid development in a short time, and many of them occupy a decisive position in today's crop composition. The reason is closely related to the intensification of the contradiction between man and land caused by the rapid population growth since Ming and Qing Dynasties and the development of market economy.

References:

Phoenix. com-The demise of the Ming Dynasty was related to Indians.