In the past few years, the author explored a set of high-yielding models for the application of local farmers in the development of Macrobrachium rosenbergii. The main technical indicators required for the production are: 200 kg per mu, 30 shrimp/500 g, and fish farming. The output is 50 kilograms, and the full price is matched with a pellet feed ratio of 1.8 or less.
First, the pond conditions: pond area of ​​1--5 acres, the maximum depth of up to 1.2 - 1.5 meters, the pond is a rectangle is good, the bottom of the pond is flat, no or less silt, the slope around the pond is 1:3, the pond water retention is better There is no pollution near the water source.
2. Disinfection and Detoxification: 15 days before the stocking of shrimps (ie around May 10), use 100 kg of lime slurry per acre to disinfect the whole pond, kill wild fish and pathogens, and improve the pH of the pond. .
Third, the quality of water culture and shrimp stocking: 10 days after the lime clear pond (ie the disappearance of medicinal properties), put the seedlings before the 3-7 days of water, water depth of 70 cm, with 60--80 purpose of the water inlet Bag filter, the water quality to maintain a certain degree of fatness, transparency of 30 cm, there are enough palatable plankton, such as water quality is too thin, you can put a small amount of fermented organic fertilizer. In late May, when the weather is clear and the water temperature of the pond is stable above 20°C, stocks of Macrobrachium rosenbergii can be stocked (incubated in the earthen pond or cement pool for about 20 days, with a body length of 2 cm), and the bag will be filled with oxygen when stocking. Immerse in water for a quarter of an hour and adjust the temperature difference within 2 degrees to gradually put the seedlings into the pond. The number of stocks raised per acre of ponds is 15,000, which needs to be counted correctly.
Fourth, feeding and management: in the entire breeding process, all use full-price pelleted feeds, require water stability 2--4 hours), put Macrobrachium rosenbergii No. 2 crushing material within 10 days after seedling release, crude protein content 32%, The particle size is 0.5 mm; it is fed from the beginning of June to the end of August of Macrobrachium rosenbergii No. 3 material, with a crude protein content of 30%; particle size of 2.0 mm; and from the beginning of September to the end of September, it is fed with No. 4 material of Macrobrachium rosenbergii, and the crude protein content is 28. %, particle size 2.5 mm. The number of feedings per day is twice, and it is 1/3 of the total number of days in the morning at 8 o'clock in the morning and 2/3 of the total number of days in the evening at 5 o'clock. Evenly, the entire pond is splashed when feeding. In the daily management, adjustments should be made based on the temperature, water quality, and shrimp eating status. It is better to eat all the shrimp without feeding them. Avoid excessive feeding and pollute the water quality.
Feeding until the end of September for sale. During the entire breeding period, the total amount of mu feeding is about 372.4 kg, the feed coefficient is 1.8, the survival rate of shrimp is 80%, and the shrimp yield can reach 200 kg or more, and a higher economy can be obtained. benefit.
V. Water quality management: The pond water should be slightly fattened in the early stage of breeding and properly light in the later period. The water color is yellow-green, the transparency is 30--50 cm, the PH value is 7--8, and the dissolved oxygen is not less than 2 mg/l. When stocking The water depth is 70 centimeters. The water level is increased by 10 centimeters every other week. The water level in the middle and late June reaches 1.2-1.5 meters. When the water quality is deteriorated or the weather is hot and the air pressure is low, more water is needed and the aerator is activated. Oxygen, open the aerator for 2 hours at noon during the high-temperature season at noon every day to reduce the temperature difference in the water layer and improve the water quality. Ponds should be equipped with aerators, with the waterwheel type as the best, with an acre power of 0.75 kilowatts.
The ponds can be stocked with larvae or the summer flowers and squid species in the current year, and each 50 mus can be put in the pond. The fish production per mu can reach 50 kilograms.
VI. Planting Concealed Materials: Swallow vegetables are planted on the pond slope around the pond. They are usually planted at the end of April. On the 70-cm water level line that was transplanted to the pond slope in early May, the planting distance is 10 cm. When the water level rises, the water spinach grows to the pond when it grows well. 2- 4 meters, the area accounts for 20% to 30% of the pond area, can be used as a good habitat and oyster shell environment Macrobrachium rosenbergii, reducing the mutual killing, can increase the survival rate and growth rate. However, the area covered by the water spinach should not be too large, otherwise it will affect the photosynthesis of water in the water and lead to the lack of oxygen in the water body.
First, the pond conditions: pond area of ​​1--5 acres, the maximum depth of up to 1.2 - 1.5 meters, the pond is a rectangle is good, the bottom of the pond is flat, no or less silt, the slope around the pond is 1:3, the pond water retention is better There is no pollution near the water source.
2. Disinfection and Detoxification: 15 days before the stocking of shrimps (ie around May 10), use 100 kg of lime slurry per acre to disinfect the whole pond, kill wild fish and pathogens, and improve the pH of the pond. .
Third, the quality of water culture and shrimp stocking: 10 days after the lime clear pond (ie the disappearance of medicinal properties), put the seedlings before the 3-7 days of water, water depth of 70 cm, with 60--80 purpose of the water inlet Bag filter, the water quality to maintain a certain degree of fatness, transparency of 30 cm, there are enough palatable plankton, such as water quality is too thin, you can put a small amount of fermented organic fertilizer. In late May, when the weather is clear and the water temperature of the pond is stable above 20°C, stocks of Macrobrachium rosenbergii can be stocked (incubated in the earthen pond or cement pool for about 20 days, with a body length of 2 cm), and the bag will be filled with oxygen when stocking. Immerse in water for a quarter of an hour and adjust the temperature difference within 2 degrees to gradually put the seedlings into the pond. The number of stocks raised per acre of ponds is 15,000, which needs to be counted correctly.
Fourth, feeding and management: in the entire breeding process, all use full-price pelleted feeds, require water stability 2--4 hours), put Macrobrachium rosenbergii No. 2 crushing material within 10 days after seedling release, crude protein content 32%, The particle size is 0.5 mm; it is fed from the beginning of June to the end of August of Macrobrachium rosenbergii No. 3 material, with a crude protein content of 30%; particle size of 2.0 mm; and from the beginning of September to the end of September, it is fed with No. 4 material of Macrobrachium rosenbergii, and the crude protein content is 28. %, particle size 2.5 mm. The number of feedings per day is twice, and it is 1/3 of the total number of days in the morning at 8 o'clock in the morning and 2/3 of the total number of days in the evening at 5 o'clock. Evenly, the entire pond is splashed when feeding. In the daily management, adjustments should be made based on the temperature, water quality, and shrimp eating status. It is better to eat all the shrimp without feeding them. Avoid excessive feeding and pollute the water quality.
Feeding until the end of September for sale. During the entire breeding period, the total amount of mu feeding is about 372.4 kg, the feed coefficient is 1.8, the survival rate of shrimp is 80%, and the shrimp yield can reach 200 kg or more, and a higher economy can be obtained. benefit.
V. Water quality management: The pond water should be slightly fattened in the early stage of breeding and properly light in the later period. The water color is yellow-green, the transparency is 30--50 cm, the PH value is 7--8, and the dissolved oxygen is not less than 2 mg/l. When stocking The water depth is 70 centimeters. The water level is increased by 10 centimeters every other week. The water level in the middle and late June reaches 1.2-1.5 meters. When the water quality is deteriorated or the weather is hot and the air pressure is low, more water is needed and the aerator is activated. Oxygen, open the aerator for 2 hours at noon during the high-temperature season at noon every day to reduce the temperature difference in the water layer and improve the water quality. Ponds should be equipped with aerators, with the waterwheel type as the best, with an acre power of 0.75 kilowatts.
The ponds can be stocked with larvae or the summer flowers and squid species in the current year, and each 50 mus can be put in the pond. The fish production per mu can reach 50 kilograms.
VI. Planting Concealed Materials: Swallow vegetables are planted on the pond slope around the pond. They are usually planted at the end of April. On the 70-cm water level line that was transplanted to the pond slope in early May, the planting distance is 10 cm. When the water level rises, the water spinach grows to the pond when it grows well. 2- 4 meters, the area accounts for 20% to 30% of the pond area, can be used as a good habitat and oyster shell environment Macrobrachium rosenbergii, reducing the mutual killing, can increase the survival rate and growth rate. However, the area covered by the water spinach should not be too large, otherwise it will affect the photosynthesis of water in the water and lead to the lack of oxygen in the water body.
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