Traditional Culture Encyclopedia - Weather forecast - Is duckbill fish suitable for farming in Xuancheng, Anhui Province?
Is duckbill fish suitable for farming in Xuancheng, Anhui Province?
Second, the living habits of platypus
1. Duckbill fish has strong adaptability, rapid growth, gentle temperament and short food chain. It is the only sturgeon that feeds on zooplankton. Its bait source is wide, easy to raise and catch, and it is suitable for breeding in reservoirs, lakes and ponds.
2. The feeding habits of platypus are similar to those of silver carp (that is, bighead carp, which is called bighead carp in different places). It is a filter-feeding fish, which mainly feeds on zooplankton and cladocera, especially on Daphnia, and occasionally eats small aquatic insects such as chironomid larvae. The paddlefish, whose body length is less than 12 cm, can eat zooplankton one by one, or eat small fish shrimp. The fish is over 12 cm long, and its feeding organs are developed, so it can catch fast-swimming copepods by filtration.
3. With the individual growth of ACIPENSER sinensis, it also eats pellet feed. In the juvenile stage, because of the long snout and peculiar body, the abdomen is upward when feeding pellet feed, which is unique and attractive, so it has high ornamental value and can be raised as a senior ornamental fish.
Third, the climatic characteristics of Xuancheng, Anhui Province
1. The climate in Xuancheng area belongs to subtropical humid monsoon climate type, which has the following remarkable characteristics: the monsoon is obvious and the four seasons are distinct. Xuancheng, located in the mid-latitude zone, is one of the areas with the most obvious monsoon climate. Due to the difference of thermal properties between land and ocean, the south wind from the ocean prevails in summer and the north wind from the inland prevails in winter. In summer, it is controlled by tropical ocean air mass, which is hot and rainy, and in winter, it is controlled by Eurasian air mass, which is cold and rainy, and the rainfall distribution is uneven during the year.
2. Summer is the longest in a year, about 12 1 day, from May 2 1 day to September 18 day, with average temperature >; 22℃; Winter comes next, about 102 days,1October 27th to March 8th of the following year 165438+, and the average temperature is <1o℃; Spring is short, about 73 days. From March 9th to May 20th, the average temperature was between10 and 22℃. Autumn is the shortest, about 69 days, from September 19 to June165438+1October 26th, and the average temperature is between 10 ~ 22℃. Warm spring, hot summer, cool autumn and cold winter have four distinct seasons. With the synchronization of light and temperature, the annual changes of sunshine and temperature tend to be consistent in the same season of rain and heat, and precipitation is concentrated in warm and hot seasons.
3. The climate is humid and the rainfall is abundant. The annual average temperature in Xuancheng is 65,438+05.6℃, the average temperature in the hottest month is 28.65,438+0℃, the average temperature in Leng Yue is 2.7℃, and the annual average temperature is 25.4℃, with mild climate change. The dryness is between 0.68 and 0.90, that is, the possible evaporation is less than the actual precipitation, which belongs to the humid climate zone. There is abundant rainfall, with annual precipitation ranging from1200mm to1500mm. The climate is humid and mild, and the frost-free period is as long as 8 months.
4. Plum rain is obvious, and it is an important weather phenomenon in Xuancheng that summer rain concentrates on plum rain. Every year, plum blossoms enter in mid-June and blossom in early July, with rainy days of about 25 days. The average amount of plum rains is 200 ~ 350 mm, which generally accounts for about a quarter of the annual rainfall. Summer rainfall concentration is one of the characteristics of monsoon climate. Generally, the summer precipitation is 500 ~ 600 mm, accounting for about 40% of the annual precipitation.
5. Xuancheng has four distinct seasons, mild climate, large annual temperature difference, moderate rainfall, abundant sunshine, long frost-free period and many easterly winds, and belongs to subtropical monsoon climate. The annual average temperature 16.0℃, the monthly average temperature 1 3.3℃ and the extreme minimum temperature-16.0℃. The average temperature in July is 28.0℃, and the extreme maximum temperature is 465438 0.5℃. The annual average temperature is 24.7℃, and the maximum daily range is 26.9℃. According to the average temperature, the four seasons in Xuancheng are as follows: March16-May 25th, summer May 26th-September 20th, autumn September 2nd1-165438+1October 20th, winter165438. The average annual growth period is 234 days, and the average annual frost-free period is 228 days, with the longest 242 days and the shortest 224 days. The annual average sunshine hours are 1784. 1 hour. The duration above 0℃ is 355 days. The annual average precipitation is 1, 429.6 mm, and the geographical distribution is characterized by more in the south and less in the north, more in the mountains and less in the plains.
6. The annual average rainy days 146 days, the maximum 179 days and the minimum 104 days. The maximum rainfall in extreme years is 2308.2mm, and the minimum rainfall in extreme years is 695.0mm. Rainfall is concentrated from May to 10 every year, with the maximum in June.
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