Rice field crabs practical operation technology (1)
2018-06-10 22:01:32
IV. Rearing and management of crabs in paddy fields
1. Feed the bait. Crabs are omnivorous animals, and common plant foods have a variety of aquatic plants. Wheat, corn, rice, bean cakes, bran, etc.; animal feeds include snails, flies, cockroaches, and other benthic animals; slaughterhouse waste, fish and shrimps, blood meal, silkworm cocoons, cockroaches, cockroaches, cladocera, and copepods Insects; There are artificial products with food. Feeding should adhere to the "time, quantitative, qualitative, fixed-point" and other four. Timing, that is, feeding each day in the afternoon and afternoon, feeding mainly in the afternoon 4 to 5; quantitative, that is, according to the crab's growth stage, season, the specific climate and grasp the amount of feeding, to ensure that crabs eat enough, avoid suddenly full Sudden hunger; Qualitative, that is animal and animal diets into crabs (5 ~ 7): (3 ~ 5), the cultivation of crab species in the early animal feed, after the third phase of plant-based food; fixed point, that is, every 10 ~ 20 square meters set a fixed feeding point, in order to prevent feeding and eating is not uniform, but also easy to check the feeding situation.
2. Water quality regulation. Rice field crabs, due to the shallow water level, especially in hot summer, in order to achieve sufficient water soluble oxygen pool, fresh water, must maintain the appropriate water level. When the water level is too shallow, it should be promptly replaced with water. When the water quality is too deep, new water should be replaced promptly. When the water is changed, the water inlet speed should not be too fast or too fast. You can use the side row irrigation method to ensure the water level is relatively stable. Under normal conditions, the depth of water in rice fields can be maintained within 5 to 10 cm. Change the number of waters, change the water once a week before June, change the water volume 1/5 to 1/4, change it from 2 to 3 times a week for 7-8 months, change the water every time, after 1/3, every 5 months after September Change the water 1 to 10 days, change the water every time 1/4 to 1/3.
3. Disease prevention and control.
(1) Bacterial disease: abdominal appendage rot, anal swelling. Sprinkle with 1ppm oxytetracycline or nitrofurazone, or 0.1-0.2g/kg oxytetracycline.
(2) Crustacea: scattered red spots appear in the early back shell, and then they form into a piece, which further develops into a middle ulcer, surrounded by black, and can be splashed with 15 to 20 ppm of quicklime to be controlled.
(3) Ciliate disease: White maggots appear in the carapace. The growth of the diseased crab is slow and the appetite is poor. It is caused by polychaetes and worms. It can use 0.25～0.4ppm malachite green or 5～10ppm formalin (40 %)treatment.
(4) Biological predators: mainly water snakes, frogs, crickets, water mice, birds, ferocious fish (carp, herring), crayfish, etc. We must do a good job of preventing equipment and prevent them from entering the crab pool. Once they are discovered, they will be killed in time.
4. Daily management should adhere to each field inspection in the morning and evening, check the water quality, and find out the water quality changes in time to take measures; 2 check the crab feeding conditions, adjust the feeding amount of the feed, such as the aquatic plants in the holding pool is eaten by the crab, Supplement planting. Check the integrity of the anti-fighting facilities in the third inspection, especially during heavy rain and windy weather, and check to prevent crabs from escaping. Four investigations of disease organisms, predators and invasives, discovering conditions, and promptly taking corresponding countermeasures. (to be continued)
1. Feed the bait. Crabs are omnivorous animals, and common plant foods have a variety of aquatic plants. Wheat, corn, rice, bean cakes, bran, etc.; animal feeds include snails, flies, cockroaches, and other benthic animals; slaughterhouse waste, fish and shrimps, blood meal, silkworm cocoons, cockroaches, cockroaches, cladocera, and copepods Insects; There are artificial products with food. Feeding should adhere to the "time, quantitative, qualitative, fixed-point" and other four. Timing, that is, feeding each day in the afternoon and afternoon, feeding mainly in the afternoon 4 to 5; quantitative, that is, according to the crab's growth stage, season, the specific climate and grasp the amount of feeding, to ensure that crabs eat enough, avoid suddenly full Sudden hunger; Qualitative, that is animal and animal diets into crabs (5 ~ 7): (3 ~ 5), the cultivation of crab species in the early animal feed, after the third phase of plant-based food; fixed point, that is, every 10 ~ 20 square meters set a fixed feeding point, in order to prevent feeding and eating is not uniform, but also easy to check the feeding situation.
2. Water quality regulation. Rice field crabs, due to the shallow water level, especially in hot summer, in order to achieve sufficient water soluble oxygen pool, fresh water, must maintain the appropriate water level. When the water level is too shallow, it should be promptly replaced with water. When the water quality is too deep, new water should be replaced promptly. When the water is changed, the water inlet speed should not be too fast or too fast. You can use the side row irrigation method to ensure the water level is relatively stable. Under normal conditions, the depth of water in rice fields can be maintained within 5 to 10 cm. Change the number of waters, change the water once a week before June, change the water volume 1/5 to 1/4, change it from 2 to 3 times a week for 7-8 months, change the water every time, after 1/3, every 5 months after September Change the water 1 to 10 days, change the water every time 1/4 to 1/3.
3. Disease prevention and control.
(1) Bacterial disease: abdominal appendage rot, anal swelling. Sprinkle with 1ppm oxytetracycline or nitrofurazone, or 0.1-0.2g/kg oxytetracycline.
(2) Crustacea: scattered red spots appear in the early back shell, and then they form into a piece, which further develops into a middle ulcer, surrounded by black, and can be splashed with 15 to 20 ppm of quicklime to be controlled.
(3) Ciliate disease: White maggots appear in the carapace. The growth of the diseased crab is slow and the appetite is poor. It is caused by polychaetes and worms. It can use 0.25～0.4ppm malachite green or 5～10ppm formalin (40 %)treatment.
(4) Biological predators: mainly water snakes, frogs, crickets, water mice, birds, ferocious fish (carp, herring), crayfish, etc. We must do a good job of preventing equipment and prevent them from entering the crab pool. Once they are discovered, they will be killed in time.
4. Daily management should adhere to each field inspection in the morning and evening, check the water quality, and find out the water quality changes in time to take measures; 2 check the crab feeding conditions, adjust the feeding amount of the feed, such as the aquatic plants in the holding pool is eaten by the crab, Supplement planting. Check the integrity of the anti-fighting facilities in the third inspection, especially during heavy rain and windy weather, and check to prevent crabs from escaping. Four investigations of disease organisms, predators and invasives, discovering conditions, and promptly taking corresponding countermeasures. (to be continued)
LPG Truck & Trailer Co., Ltd. , http://www.tomato-pastes.com