What crops are suitable for planting in the middle and lower reaches of the Yangtze River? Tell me the reason!

Rice: a plain with warm and cool nature, good water conditions and light and heat

The plain in the middle and lower reaches of the Yangtze River is one of the three major plains in China. Located along the middle and lower reaches of the Yangtze River to the east of Yichang, Hubei, it consists of two lakes (Jianghan Plain in Hubei and Dongting Lake Plain in Hunan), Poyang Lake Plain, Jiangsu-Anhui Riverside Plain, Lixiahe Plain and Yangtze River Delta Plain, covering an area of about 2, square kilometers. The two lakes plain is bounded by Jingjiang River, which is called Jianghan Plain in the north and Dongting Lake Plain in the south. Jianghan Plain is mainly formed by alluvial deposits of the Yangtze River and the Han River. Since the entrance of the Jingjiang River north dike was completely blocked around 13 AD, the sediment carried by the Han River has played a major role in the development of Jianghan Plain, and its delta has become an important part of Jianghan Plain. The terrain of Hanjiang Delta is also slightly inclined from northwest to southeast, and lakes are crowded in the southeast front. Dongting Lake Plain is mainly formed by the sediment from the Yangtze River that flows southward through Taiping, Ouchi, Songzi and Tiaoxian (blocked in 1958) on the south bank of Jingjiang River. It covers an area of about 1, square kilometers. Most of them are below 5 meters above sea level, with high terrain in the north and low terrain in the south, dense water networks and fertile soil. In addition to the marginal red earth mounds, the flood plain in the central part of Poyang Lake Plain is mainly formed by the scouring and silting of rivers such as Jiangxi, Fuzhou, Xinjiang, Poyang Lake and Xiushan, among which the Ganjiang River is the main one. It covers an area of about 2, square kilometers. The terrain is low and flat, most of them are below 5 meters above sea level, and the water network is dense, and the surface is covered with red soil and river alluvium. The plain along the Yangtze River in Jiangsu and Anhui mainly refers to the long and narrow alluvial plain distributed along the banks of the Yangtze River between Hukou and Zhenjiang, including Wuhu Plain and Chaohu Plain. The plains are wide and narrow alternately, and the river flows in and out, with a gentle velocity; Since Datong, every time it is supported by the tide, the flow velocity is slower and the sediment deposition is strengthened. Especially when the river passes over the rocky head which is forced by the rocky mound, the river branches and sandbars appear between the branches. There are many lakes on both sides of the river. The Yangtze River Delta has developed from the estuary below Zhenjiang. To the north of the delta is Lixiahe Plain. The plain is a dish-shaped depression with high, middle and low levels in Zhou Dynasty. The northern edge of the depression is the old course of the Yellow River; The southern margin is the north bank of the Yangtze River in the delta; The west edge is Hongze Lake and Yunxi levee; The eastern edge is the coastal plain of northern Jiangsu.

the banded plain along the middle and lower reaches east of the Three Gorges of the Yangtze River in China. Huaiyang Hill and Huanghuai Plain in the north, Jiangnan Hill and Zhejiang-Fujian Hill in the south. It is alluvial from the Yangtze River and its tributaries. The area is about 2, square kilometers. The terrain is low and flat, and the altitude is mostly about 5 meters. The middle reaches include Jianghan Plain in Hubei, Dongting Lake Plain in Hunan and Poyang Lake Plain in Jiangxi. The downstream plains include the plains along the Yangtze River in Anhui and Chaohu Plain (the central plain of Anhui), as well as the Yangtze River Delta between Jiangsu, Zhejiang and Shanghai. Most of the climate belongs to the north subtropical zone, and a small part belongs to the northern margin of the middle subtropical zone. The average annual temperature is 14 ~ 18℃, the coldest average monthly temperature is ~ 5.5℃, the absolute lowest temperature is-1 ~-2℃, the hottest average monthly temperature is 27 ~ 28℃, and the frost-free period is 21 ~ 27 days. Agriculture crops twice or three times a year, with annual precipitation of 1 ~ 14 mm, concentrated in spring and summer. Zonal soil is only found in low hills and gentle hills, mainly yellow brown soil or yellow cinnamon soil. The southern margin is red soil, and most of the plains are paddy soil. With developed agriculture and high land reclamation index (62.1% in Shanghai and 45.6% in Jiangsu), it is an important grain, cotton and oil production base. Rich in rice, wheat, cotton, rape, silkworm, ramie, jute and so on. Rivers and branches crisscross, and lakes are dotted, with an area of 2, square kilometers, equivalent to 1% of the plain area. On the two lakes plain, there are more than 1,3 large lakes, including small lakes, totaling more than 1,, with an area of more than 12, square kilometers, accounting for more than 2% of the area of the two lakes plain, which is the place with the largest number of lakes in China. There are many freshwater lakes, such as Poyang Lake, Dongting Lake, Taihu Lake, Hongze Lake and Chaohu Lake, which are connected with the Yangtze River, and have the function of regulating water volume and reducing flood peak. They produce fish, shrimp, crab, lotus, water chestnut and reed, as well as world treasures such as Chinese sturgeon, Chinese alligator and baiji. Aquatic products occupy an important position in China, and are known as the land of plenty. It is one of the most economically developed areas, including Shanghai, Nanjing, Wuhan, Nanchang, Suzhou, Wuxi, Changzhou, Nantong, Wuhu and Changsha. The main industries are steel, machinery, electric power, textile and chemistry, and it is an important industrial base. The plain is located in the hub of China's north-south and east-west transportation networks, with well-developed land and water transportation. The Yangtze River runs through the central part, becoming an east-west waterway artery, and its numerous tributaries form a huge waterway network.

abundant water, long flood season and small seasonal variation of water level; The river has a large drop and abundant water power; River sediment concentration is small; No ice period.

The high temperature period is consistent with the rainy period, and the water and heat resources are abundant and well coordinated. The rainy season is timely and appropriate, which is beneficial to rice growth. The plain in the middle and lower reaches of the Yangtze River and the Pearl River Delta have low terrain, fertile soil and convenient irrigation. The agricultural production in the Yangtze River basin has a long history and high production level.