2. Soak the water to the highest water level 1 week. Detect pH value, total alkalinity and total hardness, and then drain.
①pH value
Soak for 3 ~ 5 days before drying, and rinse the lime slurry as clean as possible. Soak in water for more than 5 days and test the pH value. It is required that the pH value should be stabilized at around 7.0. If not, the amount of lime should be determined according to the specific situation, and the above work should be repeated until the pH value is stable at around 7.0.
②pH value
③pH value
(4) When the pH value is between 6.5 and 7.0, the bottom of the pond can be disinfected without lime or with less lime, so as to avoid the influence of the growth of prawn seedlings with high pH value and the adjustment of water quality during the culture process.
Third, after the shrimp pond is filled with water, if there are small miscellaneous fish or fish eggs, 20ppm tea bran can be used to remove them.
Fourth, water disinfection. You can choose the kind of medicine according to the water source and your own breeding process planning.
① bleaching powder 0.5 ~ 1ppm or strong chlorine essence 0.2~0.3ppm (which has great influence on algae).
② 0.35 ~ 0.7 ppm of chlorine dioxide or dibromohydantoin (little effect on algae).
③ 0.35 ~ 0.7 ppm of dialdehyde or povidone iodine (hardly affecting algae).
Verb (abbreviation of verb) Physical and chemical indicators of water quality in shrimp ponds: (required)
Total hardness: 150 ~ 250mg/L
Total alkalinity: 70 ~ 200mg/L.
PH value: 7.8 ~ 8.5
Ammonia nitrogen < 0.3mg/L.
Nitrite < 0.02 mg/L.
Heavy metals: none
Extended data:
breeding technology
1. After putting the shrimp in the pond for 30 minutes, start feeding. In the early stage, cooked soybeans were mainly fed, supplemented by a small amount of small miscellaneous fish and snail meat. The feeding amount is 6-8% of the shrimp weight, and it is fed twice in the morning and evening.
2. According to the feeding habits, the evening accounts for about 2/3 of the daily total, combined with the splashing water by the pond. In the middle stage, the water temperature is high and the food intake is vigorous, and the food intake is 10%. In the later stage, shrimp bait can also be fed, and some compound feeds such as miscellaneous fish, soybean meal, wheat bran and vegetables can also be fed, each with 25%. The daily feeding amount changes with the water temperature and can be flexibly controlled.
3. Strengthen water quality management to ensure adequate dissolved oxygen and fresh water quality.
4, high temperature season to prevent shrimp floating head, oxygen machine.
5. When the water quality is too fat, kill plankton with quicklime and sprinkle the pool water.
6. Pay attention to patrol the pond to remove enemy creatures, frogs and snakes. ?
References:
Baidu encyclopedia-lobster