I. Selection of aquaculture area The aquaculture area is 65 hectares, with complete water and electricity facilities and convenient transportation.
Second, rice field project construction
1. In the field project, 10 mu is a yellow sturgeon paddy field ecological breeding unit. In the inside of the rice paddy dam, a ring ditch of 1.5m in width, 0.5m in bottom width, and 0.7m in depth is dug, and every 40m in the paddy field is excavated. Shallow ditch of 0.5m and depth of 0.2m (cultivation layer) makes the shallow ditch communicate with the ditch.
2. The temporary holding pool takes 10 mu as a unit, and one holding tank with a depth of 1m and an area of ​​60 square meters is built on the end of the paddy field near the water source for breeding seedlings.
Third, seed selection and stocking
1. Selection and transportation of seedlings Select healthy seed with good germplasm quality, individual uniformity, and no pollution. The stocking specification is 10g per tail. On May 12, 2004, the yellow sturgeon seedlings were purchased from Liaoyang City and transported by a live fish transporter with aeration equipment. After reaching the destination, 20 g/m3 of potassium permanganate was used for seedlings in the water tank. Disinfect for 15 minutes, then put the seed into the holding tank.
2. The seed stocking adopts the "two-level" stocking method, namely the holding pond cultivation and the paddy field cultivation. The size of the sturgeon fry was purchased at 6g/tail. The stingrays were raised on May 12 and the stocking density was 60/m3. On June 27, after fertilization in rice fields and disappearance of pesticide efficacy, the seedlings in the holding tank were stocked and raised in paddy fields at a stocking density of 350 fish per mu.
IV. Breeding management
1. Domestication Feeding and domestication are started from the raising of stocking, and timing, fixed-point, and non-quantitative domestication methods are adopted. Feeding is performed twice a day at fixed points (18 o'clock before dusk and 22 o'clock at night), and the signal is given before feeding. ) Then, after feeding, after 3 days to 5 days of acclimatization, more than 80% of the seedlings can concentrate on feeding sites.
2. The different stages of feeding and development of the stingray have different nutritional requirements. We use a special feed with a protein content of 40%, feed it twice a day, and feed the stingray breeding into three stages. The reasonable combination to meet the nutritional needs of the growth of stingray seedlings. The first stage is from May to June. The feed consists of 40% protein special feed. Each time, the total amount of photosynthetic bacteria with 2% feed is added. The seed with 6g/tail is cultivated after 45 days. The average weight of the seedlings in the pond reached 50 g per tail, with a maximum weight of 85 g per tail. The second stage is from July to August. The feed is mainly made up of 40% of mixed fish, 40% of soybean meal and 20% of bran. The supplement of lamp attracts insects. Each time, the photosynthetic bacteria with 3% of total feed is added. The third stage is from September to October. It is the stage of fattening of stingrays. The feed is based on a special feed with a protein content of 40%, supplemented by miscellaneous fish, and photosynthetic bacteria with a total feed content of 4% each time. . Adding photosynthetic bacteria and appropriate amount of mixed fish in feed can improve the quality of stingrays. During the cultivation, the bait coefficient is 1.0.
3. Lamp Insect At the end of May, as the temperature rises, a large number of insects reproduce and grow. At this time, 1 lamp is installed above the feed table in the holding tank, 2 lamps are installed above the paddy field feed table, and the lamp induces insects to fall into the water. Feeding for stingrays not only reduces feed costs, increases animal nutrition, but also reduces the occurrence of pests in rice cultivation.
Fifth, fish disease prevention
1. Insist on changing the water and maintain the effective depth of the rice field where the stingray is cultured. Before July, the field surface maintained a water depth of 10cm to 15cm; after July, the field surface maintained a water depth of 15cm to 20cm. Change the water every 5 days to 7 days.
2. Adjust the water quality, use 0.2ppm dibromohydantoin to spill over the field every 15 days, and use 8ppm to 10ppm photosynthetic bacteria to splash through the field every 10 days to keep the water fresh, cool and tender.
3. When the moss does not form a filament, the surface of the moss will be completely exterminated with 1ppm copper sulfate or 2ppm bleach.
VI. Planting and Management of Rice The basic principle of ecoculture of paddy rice in paddy fields is to improve the comprehensive benefits of rice and fish when the yield of rice is slightly reduced compared with monocropping rice.
Second, rice field project construction
1. In the field project, 10 mu is a yellow sturgeon paddy field ecological breeding unit. In the inside of the rice paddy dam, a ring ditch of 1.5m in width, 0.5m in bottom width, and 0.7m in depth is dug, and every 40m in the paddy field is excavated. Shallow ditch of 0.5m and depth of 0.2m (cultivation layer) makes the shallow ditch communicate with the ditch.
2. The temporary holding pool takes 10 mu as a unit, and one holding tank with a depth of 1m and an area of ​​60 square meters is built on the end of the paddy field near the water source for breeding seedlings.
Third, seed selection and stocking
1. Selection and transportation of seedlings Select healthy seed with good germplasm quality, individual uniformity, and no pollution. The stocking specification is 10g per tail. On May 12, 2004, the yellow sturgeon seedlings were purchased from Liaoyang City and transported by a live fish transporter with aeration equipment. After reaching the destination, 20 g/m3 of potassium permanganate was used for seedlings in the water tank. Disinfect for 15 minutes, then put the seed into the holding tank.
2. The seed stocking adopts the "two-level" stocking method, namely the holding pond cultivation and the paddy field cultivation. The size of the sturgeon fry was purchased at 6g/tail. The stingrays were raised on May 12 and the stocking density was 60/m3. On June 27, after fertilization in rice fields and disappearance of pesticide efficacy, the seedlings in the holding tank were stocked and raised in paddy fields at a stocking density of 350 fish per mu.
IV. Breeding management
1. Domestication Feeding and domestication are started from the raising of stocking, and timing, fixed-point, and non-quantitative domestication methods are adopted. Feeding is performed twice a day at fixed points (18 o'clock before dusk and 22 o'clock at night), and the signal is given before feeding. ) Then, after feeding, after 3 days to 5 days of acclimatization, more than 80% of the seedlings can concentrate on feeding sites.
2. The different stages of feeding and development of the stingray have different nutritional requirements. We use a special feed with a protein content of 40%, feed it twice a day, and feed the stingray breeding into three stages. The reasonable combination to meet the nutritional needs of the growth of stingray seedlings. The first stage is from May to June. The feed consists of 40% protein special feed. Each time, the total amount of photosynthetic bacteria with 2% feed is added. The seed with 6g/tail is cultivated after 45 days. The average weight of the seedlings in the pond reached 50 g per tail, with a maximum weight of 85 g per tail. The second stage is from July to August. The feed is mainly made up of 40% of mixed fish, 40% of soybean meal and 20% of bran. The supplement of lamp attracts insects. Each time, the photosynthetic bacteria with 3% of total feed is added. The third stage is from September to October. It is the stage of fattening of stingrays. The feed is based on a special feed with a protein content of 40%, supplemented by miscellaneous fish, and photosynthetic bacteria with a total feed content of 4% each time. . Adding photosynthetic bacteria and appropriate amount of mixed fish in feed can improve the quality of stingrays. During the cultivation, the bait coefficient is 1.0.
3. Lamp Insect At the end of May, as the temperature rises, a large number of insects reproduce and grow. At this time, 1 lamp is installed above the feed table in the holding tank, 2 lamps are installed above the paddy field feed table, and the lamp induces insects to fall into the water. Feeding for stingrays not only reduces feed costs, increases animal nutrition, but also reduces the occurrence of pests in rice cultivation.
Fifth, fish disease prevention
1. Insist on changing the water and maintain the effective depth of the rice field where the stingray is cultured. Before July, the field surface maintained a water depth of 10cm to 15cm; after July, the field surface maintained a water depth of 15cm to 20cm. Change the water every 5 days to 7 days.
2. Adjust the water quality, use 0.2ppm dibromohydantoin to spill over the field every 15 days, and use 8ppm to 10ppm photosynthetic bacteria to splash through the field every 10 days to keep the water fresh, cool and tender.
3. When the moss does not form a filament, the surface of the moss will be completely exterminated with 1ppm copper sulfate or 2ppm bleach.
VI. Planting and Management of Rice The basic principle of ecoculture of paddy rice in paddy fields is to improve the comprehensive benefits of rice and fish when the yield of rice is slightly reduced compared with monocropping rice.
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