The breeding head of high-yield technology
I. Pond Condition The pond area is 3,000 square meters to 10,000 square meters. The depth of water is more than 2 meters and it is rectangular. Water leakage is better. The bottom of the pool is flat and the silt is about 20 cm thick. It should be equipped with facilities for irrigation, feed processing, transportation, oxygenation, etc. The power of the pond-fishing machine per acre should be 0.5 kW or more. The ponds are required to be relatively contiguous and easy to manage. Second, the water quality conditions, adequate water, fresh water, no pollution. Pool water transparency is between 30 cm and 35 cm, dissolved oxygen is about 5 mg/l, not less than 2 mg/l, pH is between 7 and 8, and regular water injection is required during the cultivation period. Every month from July to September Water injection once, each injection volume is 20 cm to 30 cm. Third, the fish stocking in December, each acre stocking weight of 100 grams to 150 grams of the first group of 1000 head fish, tail weight of about 20 grams of the first group of fish head 1250 fish head; January, per acre About 200 grams of oysters and breams with tail weights of about 500 grams are weighed, and 250 species of bream and bream with tail weights of 40 grams to 50 grams are weighed. Each group weighs about 20 grams of 1,000 squid species. In this way, you can make full use of the bait in the water to obtain high yield and high efficiency. Feeding for feeding green and green feed: Feeding ryegrass perennial from March to May; Feeding Sudan grass and bitter leeks from May to September; Feeding Other dry grasses from August to October Feeding cakes, wheat and other commodities concentrates. The distribution percentages for each month of feeding were as follows: a small amount of feeding from December to February; 2% in March; 5% in April; 10% in May, 15% in June, 23% in July, and 22% in August; 16%; 5% in October; 2% in November. The feeding rate (daily feeding amount/total fish weight in the pool) is related to the water temperature as follows: Below 20°C, the feeding rate is 0.5%; from 20°C to 22°C, it is 0.5% to 1%; 22°C to 25 °C when 1% ~ 2%; 25 °C ~ 28 °C when 2% ~ 3%; 28 °C ~ 30 °C when 3% ~ 5%. Feeding adherence to the "quadruple" principle of qualitative, timing, positioning, and quantitative, feeding 2 to 3 times a day, so that a small amount of meals, improve the utilization of feed, splashing should be uniform. The food table is built southwards. It is usually built around 80 cm under water and can be properly raised in summer. Fifth, daily management should pay attention to regulating water quality, so that it is fat, live, tender and cool. During the rearing period and later period, the fish gradually grew up, the ponds contained more fish, and the fishes at night could easily float. It is necessary to turn on the oxygen at a proper time, and generally, “three open and two cannot be openedâ€. That is, when it is sunny, it will be turned on for 1 hour; when it is cloudy, it will be switched on from 2 a.m. to 4 a.m. on the next day, until the floating head is lifted; when there is danger of serious floating heads when it is overcast, it is necessary to turn on the float head until it does not float. Do not boot in the evening in normal circumstances, do not boot in rainy days, and set a limited boot time at night. Samples of fish growth were regularly collected monthly from May onwards. According to the water temperature, weather conditions, etc., a flexible grasp of the amount of feed, to prevent excessive feeding or feeding, affecting the normal growth of fish. 6. The prevention of fish diseases adheres to the principle of "prevention first, and prevention from governing." In the 10 days to 15 days before the fish ponds, 125kg to 150kg of lime are used in the clear pond to kill bacteria, pathogens and predators. April-September every 15 days, per acre water surface with 25 kg to 30 kg of calcined water Quanchiposa; August splash 1 "Excellent chlorine net" concentration of 0.2510-6; September splash 1 "fish health" , Concentration 110-6. Seventh, catching and retaining species during the period from June to October, catching once a month, each acre can list about 300 to 500 grams of head weight, about 400 kg, tail weight of 700 to 1000 grams. About 170 kilograms of squid and 130 kilograms of squid weighing between 100 grams and 200 grams. In November, dry ponds and ponds can also be harvested with tail weights ranging from 100 grams to 150 grams of the second-instar fish species of about 1000 heads, and tail weights of 450-500 grams of old and young fish are about 200.
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