Tutang weather

Biological pond soaking: Especially for earth ponds and sand ponds, it is recommended to use 50g/ mu biological oxidant and 30 g biological water purifying agent for pond soaking. Cultivation of bacteria in fertilizer and water: It is very important to cultivate bacteria in fertilizer and water in the early stage because of the low temperature of shrimp culture in winter, short sunshine time and weak photosynthesis of algae.

Recommended fertilizer and water scheme

The average inflow is preferably above 1.5m, which is beneficial to the stability of water quality after water and fertilizer application. Spray zeolite powder per mu 1 bag immediately after entering the water to purify the water quality and prevent false water color from misleading judgment. After the zeolite powder is beaten, kill harmful bacteria with 1 bottle of 3 mu. 20g/ mu biological water purifier+unicellular algae nutrient (different products are used according to the instructions) +4-5kg/ mu feed+1kg/ mu brown sugar, soaked in water for 24-48h, and preferably oxygenated at the same time. After soaking, add 200 grams of green per mu in the morning and pour it into the pond. After pouring, turn on the aerator. After 4-5 days, apply green topdressing to keep the water quality stable and prevent it from falling off. (In addition, you can use a package of 3 acres of excellent vegetables to keep the water color. Seedlings can be released 5-7 days after the water quality of topdressing is stable, and biological water purifying agent 10g/ mu can be supplemented on the day of seedling release. Supplementation of carbon source (glucose) 1kg/ mu every 3-4 days after fertilization.

water quality index

Ensure that the pH is 7.8-8.3, free of ammonia nitrogen and nitrite, and the transparency is 30-50 cm. In a safe range, the number of Vibrio is less than 5 (especially Vibrio viridis, preferably none) and the number of Flavobacterium is less than 30. When the water quality index reaches the above requirements, the seedlings can be released.

Management of one month after seedling release

Shrimp seedlings are in danger in the first 40 days or so. The causes are mainly caused by stress and excessive Vibrio. Therefore, it is very important to keep the water quality problem and improve the anti-stress ability of shrimp.

Nutrition and health care

Feed feeding mode: feed No.0 feed (seed size 1 kg? ), the day before feeding, each kilogram of feed was soaked with 2g biological water purifier +2g yeast+10g+ brown sugar +500ml water (until it was fluid)12-24h before feeding (the soaking process was stamped). Stir for 3-5 times or ventilate during soaking. Let the live bacteria and feed be fully and evenly mixed. It is suggested to use all No.0 feed and 1 feed at the stage. Mineral supplement: 30 days after seedling release, shrimp seedlings are shelled frequently and need to absorb a lot of minerals. However, due to the lack of minerals in the water, it is recommended to spray once every five days 100. Dosage: 200g/mu. Improve the anti-stress ability of shrimp: in the early stage, the anti-stress ability of shrimp seedlings was poor because of the small size of seedlings and unstable weather.

Water quality maintenance

Supplementing beneficial bacteria to maintain water color stability: it is recommended to use 20g/ mu biological water purifier and 50g/mu strong water every 3-5 days. It is suggested that 20g/ mu biological water purifying agent and 50g/ mu biological oxidant should be used every 3-5 days in conditional high-level ponds.

Supplementing beneficial bacteria to keep the water color stable: it is recommended to use 30g/ mu biological water purifying agent and 80g/ mu strong bacteria. It is suggested to use 30g/ mu biological water purifying agent +80g/ mu biological oxidant every 3-5 days and 50g/ mu powerful Bayer source every 7 days for conditional high-level ponds. At the same time, the dosage should be increased or decreased according to the change of water color and eating situation. Supplementing trace element fertilizer to keep the algae phase stable: It is suggested to supplement trace element fertilizer in time according to the change of water color, especially when the transparency becomes low and the algae phase is single. It is suggested to use 200g/ mu of Bilv every 10- 15 days.