Can you breed here in Nantong, Jiangsu? Is there any requirement for temperature?

It's hard to say. If it is an important aquaculture, it is best to ask professionals carefully. I am from Nantong, which is near the sea and belongs to the southeast. Nantong has a pleasant climate. Welcome to visit. The average winter temperature in 65438+February is 6 degrees, 3 degrees in 2000 and 8 degrees in February, which is close to the sea, so compared with other cities in Jiangsu, it is warm in winter and cool in summer. Mosquitoes definitely exist, especially in remote places and underground buildings. Tong Tong is located in the southeast of Jiangsu Province, bordering the Yangtze River in the south, the Yellow Sea in the east, facing Shanghai, Jiangsu, Wuxi and Changzhou, and backed by the vast northern Jiangsu Plain, and is known as the "gateway to rivers and seas". Nantong is an import and export material transfer hub in the Yangtze River basin and an important port city in the Yangtze River Delta. The five mountains in the urban area (namely, Langshan, Jianshan, Junshan, Huangni and Maanshan) are the high tops left on the ground after the subsidence of Jiangnan ancient land in Himalayan orogeny. Nantong has a flat terrain, with slight ups and downs along the river, offshore and north-central areas to Helixia District. Gullies crisscross the territory, connecting rivers, seas and rivers. Nantong belongs to subtropical and warm temperate monsoon climate, with mild climate and distinct four seasons. With fertile land, criss-crossing rivers and abundant rainfall, it is a river-sea plain suitable for the comprehensive development of agriculture, forestry, animal husbandry and by-fishing. The city's cultivated land is 7.07 million mu, and the output rate of cultivated land is higher than the provincial average. Mainly grain and cotton, it is rich in cotton and special cash crops, and it is an important commodity cotton production base in China. Landscape: Nantong Museum, Shuihui Garden, Dinghui Temple, Zhiyun Tower, Xiaoguang Tower and other scenic spots are surrounded by mountains and waters, each with its own characteristics. Wolf Mountain in the south of the city is the first of the eight famous Buddhist mountains in China, and it is the most worthwhile place to visit in Nantong. Nantong, as one of the open coastal cities in China 14, is a hub port for the transshipment of materials in and out of the Yangtze River basin and an important port city in the Yangtze River Delta, and is known as the "first window of the Yangtze River". Every day, 10,000-ton ships from all over the world flow here. 1, climate characteristics

Nantong is located in the mid-latitude area of the northern hemisphere. The solar altitude angle and the length of day and night do not change much throughout the year. The outline of the region is a rhombic peninsula, with three sides facing water and one facing land. Oceans and rivers have obvious regulating effects on climate and precipitation. The atmospheric circulation in the city is monsoon circulation. In winter, it is dominated by polar continental air masses, with dry and cold northerly airflow. In summer, it is controlled by tropical ocean air masses, and the southerly airflow is hot and humid. In spring and autumn, cold and warm air masses compete for dominance, and cyclone activities are frequent. Therefore, the city presents a mild climate, four distinct seasons, abundant rainfall, water and heat in the same season of the northern subtropical monsoon humid climate characteristics.

Spring begins in early April and ends in early June, lasting more than two months. The climatic characteristics are as follows: the average monthly temperature is about 65438 0.5℃ lower than that of Nanjing, Xuzhou and Lianyungang due to the slow rise of temperature due to the influence of rivers and seas; At the same time, with the invasion of cold air in the north, the weather will get cold in late spring, with more rainy days and less sunshine.

Summer lasts more than three months from mid-June to mid-September. The climatic characteristics are as follows: the early stage is generally the Meiyu period from mid-June to mid-July. Due to the different time and degree affected by summer monsoon, early plum rain, abundant plum rain and fixed plum rain with different precipitation time and quantity often appear; The end of late Meiyu was controlled by subtropical high. Under the control of a single heating flow, the rainfall decreases and the weather is hot. There are often high temperature and drought periods of 20-30 days or even longer, and the average temperature is around 27.5℃. This is the dog days, so it is called "summer drought". In summer, the temperature, precipitation, sunshine and solar radiation all reached the highest value in the whole year.

Autumn lasts for nearly two months from the end of September to the middle of June 165438+ 10, which is a transitional season in which winter monsoon replaces summer monsoon. The climate features are as follows: In autumn, under normal circumstances, the winter wind controls the ground atmosphere, the atmosphere is warm and cold, the airflow is stable, and the weather changes little, resulting in weak wind, sunny weather and crisp autumn air. However, in some years, in the contest between cold and warm air currents, there will be abnormal weather with continuous autumn rain. At this time, if there is another tropical storm crossing the border, there will be strong winds and heavy rain, and the precipitation will increase suddenly.

Winter lasts four and a half months from the middle of 165438+ 10 to the early April of the following year. During this period, there were frequent cold and high-pressure airflow in Mongolia, once every 7- 10 day. Every time cold air goes south, there will be a process of obvious cooling, strong wind and rain and snow in the metropolis, and then the weather will turn fine and warm, forming a regular weather change process of "three cold and four warm". Winter is the season with the least temperature, precipitation, sunshine and solar radiation throughout the year.

The climate division of Nantong is just between the north subtropical temperate subregion and the north subtropical temperate subregion in Jiangsu Province. Hai 'an, Rudong and Rugao belong to the northeast of the former, while the rest of Nantong belongs to the latter, named as the climate zone along the Yangtze River. According to the distance from the sea and the different coastal climate, the two subregions are divided into two subregions (Figure 1- 13), and the climate characteristics of each subregion are reflected in the differences in crop layout.

Figure 1- 13 Climate Zoning Map of Nantong City

2. Climate resources

Nantong is one of the most important agricultural areas in China, belonging to the south of the eastern forest agricultural area, with good water and heat conditions.

(1) light energy

The city is rich in light energy, with an annual average sunshine duration of 2000-2250 hours and an annual average solar radiation of1117 kcal/cm2. Geographical distribution in urban areas is the most, and Rugao is less. There are two obvious peaks in the annual time allocation. The former is from late May to mid-June, which is beneficial to the filling, maturity and harvest of summer crops. The latter is from mid-July to late August, which is beneficial to the growth of cotton bolls, rice and other big autumn crops. If the city's light energy resources are calculated according to the theoretical photosynthetic production potential, the total crop yield per mu can reach 5755-6039 kg, while the actual crop yield per mu is usually around 2000 kg at present.

(2) Heat

The city is rich in heat resources, with an annual average temperature of14.6℃ ~15.1℃ and a long frost-free period of 2 12-235 days. In fact, there are only 50-60 frost days every year. When the average temperature drops to 0℃ or below, severe frost and soil freezing occur, and the average cold period is only 20-25 days. The annual average minimum temperature is -7℃ ~ 8℃. The number of days when the annual temperature is stable above 0℃ is 330-345 days, the total accumulated temperature is 5300℃-5500℃, the cultivation period is very long, and the active growth period when the temperature is stable above 10℃ is 220-230 days, which is very beneficial to rice, cotton and other heat-loving crops. The city's heat is guaranteed to be more than two crops a year, and under certain conditions, it can also be three crops a year.

(3) Moisture

The city is rich in precipitation, with annual average rainy days 120 days, annual average precipitation1000-100 mm, annual evaporation 1300- 1400 mm, and dry (k = e/.

The seasonal variation of precipitation is the most in the flood season from May to September, accounting for about 665,438+0-67% of the annual total, and there are several relatively concentrated periods: from late April to early May, there is "peach blossom water", which can provide water for the later growth of summer sowing crops and the emergence of spring sowing crops; There is "Meiyu" from late June to mid-July, which can meet the needs of vigorous growth of crops in summer and autumn; There is "typhoon water" from late July to early September, and "white dew" in the middle and early September, which is also conducive to late maturity of autumn crops. However, the interannual variation of precipitation in Nantong area is great. For example, the maximum annual precipitation of 192 1 year reaches 1759. 1 mm, and the minimum precipitation of 1933 is only 243.6 mm; The maximum precipitation in summer can reach 600-900 mm, and the minimum is less than 200 mm, which is prone to drought and flood disasters.