Water quality regulation and aeration is the key 1 It is necessary to frequently start the aerator and prolong the aeration time, especially during the evening and later in the night. During the rainy season, the common manifestation of “low dissolved oxygen syndrome†is easy to hypoxia. 2 For ponds without oxygenation equipment, it is recommended to use “granular oxygen†once every 3 days to 5 days. Use better after midnight to increase the dissolved oxygen at the bottom of the pool to reduce the generation of harmful substances at the bottom of the tank. The breeding density is high and the water quality is unstable. The ponds can be flexibly used to increase the number of uses, often adding some fresh water, raising the water level appropriately, and replacing the bottom water as much as possible. 3 Use a good bottom improver to improve the quality of bottoms. It can be used together with "granular oxygen". It is best to use once every 7 days to eliminate the harmful substances in the bottom layer, inhibit the reproduction of germs, maintain good water quality, and prevent deterioration of the bottoms. Feed is the most important for feeding fresh 1 To control the amount of feeding, the amount of feeding should be flexibly controlled according to the weather, changes in water quality, and feeding conditions. The shrimps and crabs generally hold 70% to 80% satiation. 2 During the rainy season, the feed is easy to mold. Below the feed store, there must be a bottom of 10 cm to 15 cm in height. Ventilate all around to protect the air. At the same time, reduce the amount of chilled fish fed so as not to pollute the water. Daily management inspections should be carefully 1 Huang Meitian should step up the inspection of the ponds and take measures to ensure the healthy growth of shrimps and crabs in case of abnormalities. If oxygen deficiency is found, throw oxygen aerators immediately and turn on aerators at the same time. 2 The shrimp and crab ponds should cover more than 70% of water plants, and should be properly removed to leave channels of water to increase the flow and light of the water. When there are dirt on the surface of the plants, they should be frequently flooded to promote the flow of water. Under the premise of oxygen, Bacillus spp. was used to regulate water quality. After the plum was tested, the water quality was checked and quick lime was used to adjust the pH. Disease prevention can not be used indiscriminately 1 The rational use of microbial agents. Bacillus, EM bacteria, and nitrifying bacteria are common. In the rainy season, due to poor light conditions, it is best not to use photosynthetic bacteria. 2 During the rainy season, VC, multi-dimensional, allicin, three yellow powders, and lure-enhancing and long-acting agents can be selected to feed the bait, so as to improve the digestion ability of the farmed animals and enhance the anti-stress ability. It is recommended to add 1 time per 10 times. 2 days to 3 days. 3 Be careful not to use drugs indiscriminately. Try not to use disinfectants and insecticides during the rainy season, and do not promote water. Freeze Peeled Garlic,Freeze Garlic Cloves That Are Peeled,Freeze Peeled Garlic Cloves,Freezing Fresh Peeled Garlic shandong changrong international trade co.,ltd. , https://www.changronggarliccn.com
Shrimp and crab pond aquaculture management technology
In order to ensure that the shrimp and crab pond culture can successfully survive the rainy season, according to the author's years of farming experience at the grass-roots level, the following four main aquaculture management techniques should be done.