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Why is Chengdu Plain in Sichuan Basin known as a land of abundance? (Try to analyze from the perspectives of topography, climate, soil and farming history)
1. 1 historical allusions

It is called "the land of abundance" because Tianfu was originally an official position, mainly in charge of human treasures. Later, after the Dujiangyan water conservancy project was built by Li Bing and Zi Erlang, the "governors" of Shu County in Qin Dynasty, the Chengdu Plain became rich, and "floods and droughts depend on people, and hunger is unknown" became the main grain supply base and the main source of tax revenue of the central dynasty. In addition, the basin has a special strategic position in the era of cold weapons, thus avoiding the destruction of many wars in history and obtaining a relatively stable social environment.

Many far-sighted strategists in history, such as Sean and Zhuge Liang, regard Sichuan as the foundation of their country. In the middle and late Tang Dynasty, there was a war in Guanzhong, and both Xuanzong and Tang Xizong chose Chengdu, Sichuan to avoid chaos. More than 60 years ago, in War of Resistance against Japanese Aggression, Chiang Kai-shek even predicted: "Victory will never leave Sichuan, and failure will never leave Bay". Although the armed forces cooperating with the Kuomintang defeated the Japanese invaders, the victorious Kuomintang government was finally defeated and fled to Taiwan Province Province.

"Yizhou is in danger, fertile land is thousands of miles away, and the land is rich, so the emperor can be the emperor." This is a famous sentence in the famous book Longzhongdui in history. The reason why the author Zhuge Liang helped Liu Bei, a native of Hebei Province, become emperor is probably related to the prediction that "victory will not lead to Sichuan". During the Three Kingdoms period, Liu Bei led the mob and hit and run, but he was able to preserve his strength, which was related to the unique geographical position of Sichuan.

Besides, what happened in these 20 years, there is a saying in Sichuan that "you should look for Ziyang when you eat food", which shows that the rapid development of Sichuan has a historical origin. Today, as long as the leaders and people of Sichuan can conform to this origin, the land of abundance will always be a land of wealth through the ages.

1.2 Beautiful Sichuan

Sichuan, known as the "land of abundance", has beautiful natural features of mountains and rivers: diverse topography, overlapping peaks and verdant rivers; There is also the historical humanities that show off the crown of China: Bashu culture has a long history and famous writers come forth in large numbers. Here, nature, humanity and social customs depend on each other and blend with each other, creating a land of abundance with unique advantages and high taste.

Tianfu was originally the name of an official position. He is an official in charge of the "national treasury" for the "son of heaven". This official position was established on Sunday. At that time, productivity was backward, and all the things that Tianfu was in charge of were rare and precious, such as money, rice, gold and silver jewelry, books, books and so on. He manages all the oil and water resources of a country.

But "Tianfu" first refers not to Sichuan, but to Qin in the hinterland of Qinchuan. Inventor is the famous strategist Su Qin; This figure, who relied on "hanging his head and stabbing stocks" and "learning officials", went to the state of Qin to please the king of Qin, saying that Qin Guoqiang was developed in agriculture, prosperous in economy and powerful in military affairs; There is no doubt that it should be like something ... he couldn't find the right word to describe it at once, so he found the word "Tianfu" It is said that Qin is really a land of abundance.

1.3 Why is the land of abundance in Chengdu?

Why did the land of abundance move from north to south to Chengdu after more than 2000 years? There are two reasons:

On the one hand, the ancient emperor of China made two unforgivable mistakes in the north. As we all know, after the Spring and Autumn Period and the Warring States Period, Qin unified the six countries. At that time, the population was about 100 million, and there were many more women than men. In this case, Qin Shihuang did not practice recuperation, but sent his eldest son, Fu Su, and general Meng Tian to guard the northern border with 300,000 troops. At the same time, 300,000 civilian workers were recruited to build the Great Wall, 500,000 civilian workers to build Epang Palace and 700,000 civilian workers to build the Qin Liling. This has caused two serious problems: first, there is a shortage of men in the population (family planning has been advanced for more than 2000 years), and fertility cannot keep up; Second, large-scale construction has caused soil erosion in the north. For example, Epang Palace burned for three months. Think of 1989 A fire in Daxinganling, which burned 560,000 hectares of forest area in just 27 days. Soil erosion will inevitably lead to poor land. Now only look at the loess high slope.

On the other hand, in Chengdu, Li Bing, the second governor of Shu County (the first one looked around and could only fight) built Dujiangyan, which made great contributions to the agricultural production in Chengdu Plain. Later, during the Three Kingdoms period, Kong Ming rewarded farming, developed production and built water conservancy projects. This is a great impetus to the plain agriculture in Chengdu. The life phenomenon of "not picking up the remains and not closing the door at night" has been realized in the territory, and the reputation of a land of abundance has been spread. In the heyday of Chengdu in the Tang Dynasty, a poem by Li Bai said: "Ten thousand Chengdu will be opened on the ninth day, and ten thousand households will show their paintings. Every grass and tree is as beautiful as a cloud. There was nothing here in Qin Dynasty. " Chengdu's position as a land of abundance has been consolidated. This is the first time in history that "Qin" and "Shu" are compared, and the status of Shu has been established, so Chengdu replaced the crown of "Land of Abundance" of Qin State and obtained the patent right of "Land of Abundance".

1.4 natural resources

The terrain here is very comfortable. She has the richest vast plain in the west, which lies between Longquan Mountain, Longmen Mountain and Qionglai Mountain. It starts from Jiangyou in the north and ends at Leshan Wu Tong Bridge in the south. Administratively, it includes Chengdu, Deyang, Mianyang, Leshan and Meishan, with a total area of 22,900 square kilometers and a total population of 27.986 million (in 2004), accounting for 36% of the population of Sichuan Province. The core area has arrived. Dujiang ancient weir built in Qin Dynasty cared for her like a giant hand, and Siguniang Mountain was her strong backbone. The subtropical humid monsoon climate endows her with an annual average temperature of 18℃ and an annual precipitation of more than1000 mm. She has fertile and flat green plains, comfortable and pleasant climatic conditions, rich canals and rivers and thousands of years of time and space inheritance.

1.5 pleasant scenery

The scenery here is picturesque. The beautiful Longquan Mountain is like an oriental snake, the quiet and clean Wuhou Temple is full of thoughts, the smoky Qingyang Palace is full of piety, the beautiful Qingcheng Mountain is still full of fairy tales, and there are still few Sanskrit voices in front of the beautiful Emei Mountain. The mountains and rivers here have both the charm of Jiangnan and the lofty sentiments of the west. Gongga Mountain and Siguniang Mountain guarded her like giants, and the Yangtze River and Jialing River lost their lives. "Open 10% in nine days, and thousands of families draw pictures." Li Bai, a poet, traveled all over China, and his admiration for him added a bit of bookishness to the mountains of the land of abundance.