Green penaeids are generally raised in two cultures. The first eel is released in winter and spring (hereinafter referred to as spring shrimp); the second eel is stocked in the end of June to early August (hereinafter abbreviated as "shrimp"). Every shrimp aquaculture has to undergo pond preparation, disinfection of clear ponds, planting of aquatic plants and setting up of inhabited grids, water injection and fertilization, and other preliminary preparations. The following is a brief introduction of the mode of high-yield, high-efficiency cultivation and low-yield culture of single-cultured shrimp ponds.
The pond requires an area of ​​3 to 6 acres, with a rectangular shape, a large gradient, complete drainage and drainage facilities, and oxygen aeration facilities. The air pump is the best choice for sand-incorporated gas heads. The filling power is 1.1 kilowatts per 3 acres.
Spring shrimp breeding stocking time is from December of the previous year to February of the following year. The shrimp seedling size is 400-1200 tails/kg, and the stocking amount is 25-30 kg/mu. In mid-April, the use of land to catch large stay small until the June dry pond fishing. The feed is mainly based on full-price pellet feed for shrimps, supplemented by fresh feed such as small-sized fish, and generally has a yield of 40-60 kilograms per mu.
The best time of autumn shrimp rearing is from the end of June to the beginning of August. The shrimp seedling size is 1.5 to 2 cm (4000 to 6000 tails/kg), and the stocking capacity is 50,000 to 80,000 pigs per mu. Water plants are mainly submerged plants. The interval between 15 and 20 days, 5 to 10 kg of lime per acre is used to regulate water quality, timely fertilization, and the transparency of the pool water is controlled at 30 to 35 centimeters. The water is replaced once a week, and each time the water is changed by about 10 centimeters. During the high temperature period, in order to maintain the water level stable, feeding, timing, positioning, quantification and quantification shall be done. The daily feeding amount accounts for 8% to 10% of the shrimp weight in the early period, and the shrimp weight is 3% to 4% in the later period, and is fed twice a day. , one in the morning and one in the afternoon, and 70% in the afternoon. Raise until mid-September, pay attention to the hatching of the early-ripened shrimp zoea, find zoea, increase the amount of water every day, the time generally lasts 10 to 15 days. After mid-October, catching large and small can be adopted to properly arrest and reduce the amount of ponds to be stored. Usually, the catch production will be about 150 kg per mu, and the listing rate will be over 70%.
The pond requires flat-type “well†ponds that are excavated in old fish ponds, shallow ponds or paddy fields. The area is generally 8 to 15 acres, the pond slope is small, and the water depth on the field boards is 0.6 to 1 meter, and there is no need for aeration facilities. .
A stocking anniversary fishing is a low-yielding shrimp farming method. In December of last year, stocks of 400 to 1200 tails/kg were stocked and 15 to 20 kg were placed in the acre. The spring of the following year will catch small and stay small, and the breeding season will use the pond's own young shrimp to breed the young shrimp. Generally, the annual mu yield will be 30-50 kilograms. This type of farming tends to lead to degraded shrimp germplasm and the market size of the shrimp is small.
The spring shrimp culture was stocked in December of last year. The size of the shrimp was 400 to 1200 tails/kg, and stocking was 15 to 20 kg per acre. Water plants should not be too much, and the coverage rate is generally 15% to 20%. In April, mature organic fertilizers will be applied, and the feed will be coarsely mixed. Generally, full-priced pellets will account for 40%, wheat and soybean meal will account for 60%, and spring yield will be about 15kg.
The coverage of aquatic plants in autumn shrimp farming is generally 20% to 30%. Long strips of weeds are provided in poolsides and pools. The water transparency is about 35 cm. The amount of fertilizer should not be too high, generally less than 100 kg of organic fertilizer per acre. Mu larvae have 30,000 to 40,000 tails (1 to 1.5 centimeters in size), and the stocking time ranges from mid-June to mid-July. Since the pond area is large and the drainage effect is not obvious, most of the shrimp seedlings propagated by early-maturing shrimps All stay in the pond. Feeding full-grain pellet feed at the early stage, the feed amount accounts for 6% to 8% of the shrimp body weight. In the later period, the pellet feed is mixed with soybean meal, wheat flour, and corn, and the pellet feed accounts for 40%, and the feed amount accounts for the shrimp weight. % to 6%. The yield per mu is 30-40 kg, and the market rate is low. The output of medium and small shrimp accounts for about 40%. The advantages of this type of farming method are less investment and less risk, which is suitable for use in economically underdeveloped regions.
The pond requires an area of ​​3 to 6 acres, with a rectangular shape, a large gradient, complete drainage and drainage facilities, and oxygen aeration facilities. The air pump is the best choice for sand-incorporated gas heads. The filling power is 1.1 kilowatts per 3 acres.
Spring shrimp breeding stocking time is from December of the previous year to February of the following year. The shrimp seedling size is 400-1200 tails/kg, and the stocking amount is 25-30 kg/mu. In mid-April, the use of land to catch large stay small until the June dry pond fishing. The feed is mainly based on full-price pellet feed for shrimps, supplemented by fresh feed such as small-sized fish, and generally has a yield of 40-60 kilograms per mu.
The best time of autumn shrimp rearing is from the end of June to the beginning of August. The shrimp seedling size is 1.5 to 2 cm (4000 to 6000 tails/kg), and the stocking capacity is 50,000 to 80,000 pigs per mu. Water plants are mainly submerged plants. The interval between 15 and 20 days, 5 to 10 kg of lime per acre is used to regulate water quality, timely fertilization, and the transparency of the pool water is controlled at 30 to 35 centimeters. The water is replaced once a week, and each time the water is changed by about 10 centimeters. During the high temperature period, in order to maintain the water level stable, feeding, timing, positioning, quantification and quantification shall be done. The daily feeding amount accounts for 8% to 10% of the shrimp weight in the early period, and the shrimp weight is 3% to 4% in the later period, and is fed twice a day. , one in the morning and one in the afternoon, and 70% in the afternoon. Raise until mid-September, pay attention to the hatching of the early-ripened shrimp zoea, find zoea, increase the amount of water every day, the time generally lasts 10 to 15 days. After mid-October, catching large and small can be adopted to properly arrest and reduce the amount of ponds to be stored. Usually, the catch production will be about 150 kg per mu, and the listing rate will be over 70%.
The pond requires flat-type “well†ponds that are excavated in old fish ponds, shallow ponds or paddy fields. The area is generally 8 to 15 acres, the pond slope is small, and the water depth on the field boards is 0.6 to 1 meter, and there is no need for aeration facilities. .
A stocking anniversary fishing is a low-yielding shrimp farming method. In December of last year, stocks of 400 to 1200 tails/kg were stocked and 15 to 20 kg were placed in the acre. The spring of the following year will catch small and stay small, and the breeding season will use the pond's own young shrimp to breed the young shrimp. Generally, the annual mu yield will be 30-50 kilograms. This type of farming tends to lead to degraded shrimp germplasm and the market size of the shrimp is small.
The spring shrimp culture was stocked in December of last year. The size of the shrimp was 400 to 1200 tails/kg, and stocking was 15 to 20 kg per acre. Water plants should not be too much, and the coverage rate is generally 15% to 20%. In April, mature organic fertilizers will be applied, and the feed will be coarsely mixed. Generally, full-priced pellets will account for 40%, wheat and soybean meal will account for 60%, and spring yield will be about 15kg.
The coverage of aquatic plants in autumn shrimp farming is generally 20% to 30%. Long strips of weeds are provided in poolsides and pools. The water transparency is about 35 cm. The amount of fertilizer should not be too high, generally less than 100 kg of organic fertilizer per acre. Mu larvae have 30,000 to 40,000 tails (1 to 1.5 centimeters in size), and the stocking time ranges from mid-June to mid-July. Since the pond area is large and the drainage effect is not obvious, most of the shrimp seedlings propagated by early-maturing shrimps All stay in the pond. Feeding full-grain pellet feed at the early stage, the feed amount accounts for 6% to 8% of the shrimp body weight. In the later period, the pellet feed is mixed with soybean meal, wheat flour, and corn, and the pellet feed accounts for 40%, and the feed amount accounts for the shrimp weight. % to 6%. The yield per mu is 30-40 kg, and the market rate is low. The output of medium and small shrimp accounts for about 40%. The advantages of this type of farming method are less investment and less risk, which is suitable for use in economically underdeveloped regions.
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