The geomorphological characteristics of the Songnen Plain, where is the Songnen Plain

It is located in the southwest of Heilongjiang Province.

The Songnen Plain is one of the important commercial grain production areas in China, with fertile soil, black soil and chernozem accounting for more than 60%, rich in soybean, wheat, corn, sugar beet, flax, potato, etc., and is an important commercial grain base. Spring wheat, corn, sorghum, and millet are the main crops for grain production, and early-maturing japonica rice is planted in some areas. The cash crops are mainly soybeans, sugar beets and flax.

In the central and southern basins of the Songnen Plain, there are natural beauties such as grassland wetlands, rivers and lakes, mud forests, forests, seas and snow fields.

The Songnen Plain is located in the Greater and Lesser Khing'an MountainsChangbai Mountainsand the central region of the Songliao Basin between the Songliao watershed.

The Songnen Plain is the northern plain of the eastern dug jujube.

The largest component is located in the central area of the Songliao Basin between the Greater and Lesser Khing'an Mountains and the Changbai Mountains and the Songliao Watershed, mainly by the Songhua River.

and the Nenjiang River alluvium. In Heilongjiang Province, only the northern half of the Songnen Plain is located, 540 kilometers from north to south and about 430 kilometers from east to west.

The Songnen Plain is in the Great Khing'an Mountains.

The piedmont is a undulating erosion plateau with an altitude of about 200-250 meters. Relative height 10, 30 meters. There are many weathered detrital materials and clay belonging to the Baitushan Formation formed from the end of the Tertiary to the beginning of the Quaternary, and the soil belongs to the erosion and leaching type, with thin soil layer, coarse texture and acidic reaction.

Land resources

The Songnen Plain has 5.59 million hectares of cultivated land, fertile soil, black soil, chernozem accounts for more than 60%, rich in soybeans, wheat, corn, sugar beet, flax, potatoes, etc., is an important debate chain commodity grain judgment base, in addition, the plain grassland is concentrated, animal husbandry is developed, and the underground oil resources are abundant.

Hello, now I'm here to answer your questions on the Li Cave. Where is the Songnen Plain, I believe that many friends in the Songnen Plain still don't know, now let's take a look! 1. Typical temperate monsoon climate ,..

1. The typical temperate monsoon climate, with high temperature and rain in summer, cold and dry pine and neen plain in winter disturbed dry season, is an integral part of the Northeast Plain.

2. It is located between the Great and Small Xing'an Mountains and the Changbai Mountains and the Songliao Watershed, and is mainly formed by the alluvium of the Songhua River and the Nenjiang River.

Agricultural location factors:

1. Climate: Typical temperate monsoon climate, with high temperature and rain in summer, cold and dry in winter.

2. Topography: The Songnen Plain belongs to the northern part of the second subsidence zone of the New China tectonic system, also known as the Songliao fault depression. After the Yanshan movement, a trench-type basin was formed, which was limited by faults on all sides, the east and west sides were the Hercynian fold belt, and the middle part was a platform structure, which has the rudimentary form of modern landform.

3. Soil: In this area of the Songnen Plain, the upper part of the soil composition is loess-like sub-clay, the lower part is a gravel layer, and the surface is widely developed with black soil.

4. Unfavorable factors: less calorie, short growth period, more can only develop one-year crops, and the crop variety is single.

The main crops grown in the Songnen Plain include corn, rice, soybeans, spring wheat, sorghum, potatoes, sugar beets, flax, sunflowers, cabbage, radish, green onions, beans, eggplants, tomatoes, etc. Reason: The Songnen Plain has flat terrain, fertile soil, and strong water and fertilizer retention capacity; In summer, it is high temperature and rainy, and the combination of water and heat conditions is good at the same time. There are rivers such as Songhua River and Nenjiang River in the surrounding area, and the irrigation water source is sufficient.

1. The main crops planted in the Songnen Plain

1. Types of crops suitable for planting.

The Songnen Plain is one of the important commercial grain producing areas in China, and the main crops grown include corn, rice, soybeans, spring wheat, sorghum, potatoes, sugar beets, flax, sunflowers, cabbage, radish, green onions, beans, eggplants, tomatoes, etc.

2. Reasons. 1) Soil.

The Songnen Plain has a deep soil layer, fertile soil, moderate texture, good structure, strong water and fertilizer retention ability, more than 60% is chernozem and black soil, the organic matter content reaches 4-8%, the humus composition is mainly humic acid, and the substitution salt ions are mainly calcium and magnesium, which belongs to the saline saturated soil, except for the humus layer which is nearly neutral, the other layers are slightly alkaline (between), which is second only to the black soil suitable for agriculture.

2) Terrain. The Songnen Plain is mostly plain, and the terrain is flat, which is suitable for growing crops.

3) Climate. Songnen Plain is located at 43°-48°N, located in the middle part of Northeast China, belongs to the temperate monsoon climate, although the hydrothermal conditions are not very sufficient, but the summer is high temperature and rainy, rain and heat at the same time, the combination of water and heat conditions is good, which is conducive to the growth of crops.

4) Water source. There are rivers such as Songhua River and Nenjiang River in the surrounding area, with sufficient irrigation water sources and convenient irrigation.

5) Mechanization.

The Songnen Plain has a high degree of mechanization and flat terrain, which is also very conducive to mechanized operations.

2. The location of the Songnen Plain

1. The Songnen Plain is the largest component of the Northeast Plain, located in the central area of the Songliao Basin between the Great and Small Xing'an Mountains, the Changbai Mountains and the Songliao Watershed, and is formed by the alluvium of the Songhua River and the Nenjiang River.

2. The western part of the Songnen Plain is bounded by Jingxing, Longjiang Zhujiakan, Gannan Taiping Lake and the Daxing'an Mountains, the eastern and northeastern parts are bounded by the Keluo River, Qixingpao, Xiaoxing'an Mountains, the north and south Hexi, Tieli, Bayan Longquan Town and the Xiaoxing'an Mountains, the southeast is bounded by Longfeng Mountain, Wuchang Anjia, Acheng Yagou, Binxi and the eastern mountains, and the southern part reaches the Songliao watershed.