Average temperature, annual precipitation, river hydrological characteristics, main crops, feeding habits and residential characteristics in the north of Huaihe River in Qinling Mountains 1 month.

Qinling-Huaihe River North-South Comparison Table Area Project Qinling-North of Huaihe River-Latitude position 32 N ~ 34 N The main landforms in the north and south of Huaihe River are plains and hills. 1 month, the average temperature is below 0℃, and the annual precipitation in warm temperate subtropical areas is between 400 mm and 800 mm above 0℃. The rainy season is long and rainy. The seasonal variation of precipitation is very small. Under dry and wet conditions, the river flow in humid areas is small, seasonal changes are great and the flow is rich. Seasonal variation of small sediment concentration, large sediment concentration, small flood season and short flood season. Ice age is frozen in winter, but not in winter. The main types of agricultural arable land are dry land, paddy field, grain crops, wheat, rice, oil crops, peanuts, sugar crops, sugar beets and sugarcane. Farming system: two-year triple cropping to two-year double cropping to one-year double cropping to three-year triple cropping-the north-south dividing line of China. We need to find out the direction of the Huaihe River Line in Qinling Mountains, and what is its important condition as the dividing line between the north and the south. Know what geography this dividing line is. First of all, it has become an important geographical dividing line in China, which must be due to the landform differences on both sides of this line. There are many factors that cause different landscapes, such as temperature and precipitation, and topography. Generally speaking, the difference between different regions is often due to more factors caused by climate, such as more precipitation in the south, less precipitation in the north, more precipitation in the eastern coastal areas and less precipitation in the western inland areas. Needless to say, it can be inferred from the above introduction that this line must be the dividing line of climate. From this, we can understand the differences of temperature, precipitation, dry and wet conditions on both sides of the Qinling-Huaihe boundary, as well as the differences of river hydrological characteristics, agricultural conditions and soil vegetation under this climate difference. According to the related geographical atlas, the Huaihe River line in Qinling Mountains runs east-west, and it is the passing place of 1 month 0 degree isotherm and 800 mm annual precipitation line. In addition, the Qinling Mountains can prevent the cold wave from going south in winter and the humid sea breeze from entering the northwest in summer, which leads to the differences in climate, rivers, vegetation, soil and agriculture between the north and the south of this line, so it naturally becomes an important dividing line in eastern China. The dividing line between Qinling Mountain and Huaihe River plays an important role in dividing: 1, subtropical zone and warm temperate zone. Reason: China's 1 month 0-degree isotherm passes through the Huaihe River in Qinling Mountains, and the average temperature north of the 1 month 0-degree isotherm is below 0, which belongs to a warm temperate zone. South of 0℃ isotherm 1 month, the average temperature is above 0℃, which belongs to subtropical zone. 2. The dividing line between the humid area and the semi-humid area. Depending on the amount of precipitation. 3. According to the differences of ice age, flood season, discharge, sediment concentration and shipping, the dividing line with obvious differences in river conditions is obtained. 4. The boundary between different soils and vegetation depends on different plants on both sides, such as coniferous forest and deciduous broad-leaved forest in the north and evergreen broad-leaved forest in the south. And the characteristics of black soil in the north and red soil in the south. 5. The dividing line of agricultural production is different. Agriculture in the north is mainly dry land, usually one or two crops a year, mainly wheat and corn; Paddy fields are dominant in the south, with two or three crops a year, mainly rice and wheat. Qinling National Botanical Garden is located in zhouzhi county, Xi Province, 76 kilometers away from the city center. The total planned area is 458Km2, of which the central area is 262Km2, ranking first in the world. The total investment budget of Qinling National Botanical Garden is 65.438+0.38 billion yuan, and the investment of the first phase project is 530 million yuan. Its main functions are scientific research, popular science education, biodiversity protection and eco-tourism.