Was the double cropping rice discovered by Kangxi?

No. Rice originates from China and has been cultivated in the Yangtze River basin since 7,000 years ago. According to different methods, rice can be divided into indica and japonica rice, early rice and middle and late rice, glutinous rice and non-glutinous rice.

Chinese scientist Yuan Longping has made great contributions to the research of hybrid rice and is known as the "father of hybrid rice". The fruits of rice are rice, and the rice (grain) is called rice, fragrant rice, and rice after being hulled. Nearly half of the world's population feeds on rice.

There are various ways to eat rice, including rice, rice porridge, rice cakes, rice cakes, rice wine, etc. In addition to being edible, rice can also be used as industrial raw materials for brewing and sugar, and rice husks and rice stalks can be used as feed. The main rice producing areas in China are mainly the Northeast China, the Yangtze River Basin, and the Pearl River Basin.

It is a direct cash crop. It is also the staple food of one-third of the world's human race.

Rice is harvested twice a year mainly depending on the climatic conditions of the planting place, and during the Ming Dynasty, there was a large-scale planting of Champong rice, and it was recorded that the southern region obtained two crops a year. What does it have to do with Kangxi?

The earliest appearance of the rice double-cropping system in southern China was in the Tang Dynasty, which has nothing to do with Kangxi.

Rice is native to the low latitudes of the tropics, and it can only be planted once a year in order to flower and bear fruit under short-day conditions. Since the advent of early rice varieties that are not sensitive to short days, rice cultivation has gradually advanced to the Yellow River Basin, where summer sunshine is longer, while in the south, two to three crops a year can be planted. Its modalities and evolution include:

the use of regenerative rice; The seeds of early rice and late rice were mixed, and the early rice was harvested first and then the late rice was harvested. The implementation of transplanting, first planting early rice and then planting late rice, the development of double cropping rice with two harvests a year. From the Song Dynasty to the Qing Dynasty, double-cropping rice has always been the main farming system in the coastal areas of Fujian and Zhejiang. The proportion of double-cropping rice is very small. By the Ming and Qing dynasties, the middle reaches of the Yangtze River were dominated by double-cropping rice.

Since the Tang and Song dynasties, winter wheat has been planted in the late rice fields in the Taihu Lake Basin, and the rice-wheat double cropping system has gradually been formed, which has continued to this day.

In the Song Dynasty, the Song Dynasty's work on rice varieties and their fertility and cultivation characteristics said that double-cropping rice was already common in the south at that time.

The two-crop rice in the north was cultivated in his experimental field by Kangxi taking seeds from the south back to Beijing during his southern tour.

It wasn't discovered by Kangxi.

It is a historical material of the Tang Dynasty.

Wu Di is fertile and the things are many, and the crops are cut and planted with wheat, and they are ripe again at the age of one year. This kind of two-cropping farming system has appeared in the Tang Dynasty, and Wu Di is the Taihu Lake basin area in the south of the Yangtze River.

Other reasons. The development of irrigation of farmland and the improvement of agricultural implements.

1) The Grand Canal is conducive to farmland irrigation;

2) Tang set up officials to manage water conservancy;

3) Creation of cylinder cars and curved ploughs.

It is a double-cropping rice invented by Emperor Kangxi. This is a true record of historians. In the era before the Kangxi Emperor, although rice was widely cultivated in the south, the rice had a long maturity period and could only be harvested once a year.

Later, Emperor Kangxi studied rice in Beijing and discovered new varieties that could greatly shorten the maturity period, so according to the warm and long temperature in the south, the idea of planting twice was born. Later, after experimentation, the planting was successful! Because Emperor Kangxi was a Manchurian, many people didn't want to recognize it, so they distorted history and said that double-cropping rice was naturally made, or invented by an ancient agricultural scholar, which is purely to mislead future generations!

If anyone refutes it, I ask you to go to the Palace Museum in Beijing and check the historical records to prove it.

It's not that it has nothing to do with invention, for example, no matter how much you grow in the Northeast, you can't produce two crops a year, while in Guangdong, you don't care about it, it grows three times a year.

The earliest rice cropping system in southern China was in the Tang Dynasty, what does it have to do with Kangxi?