Autumn pond management methods and precautions
Pond management is very important for aquaculture, and pond management varies from season to season, as water temperatures vary from season to season. Let's take a look at the measures for autumn pond management today. First, regulate water quality As the amount of fish in the pond increases gradually, the metabolites of fish, shrimp and crab also increase accordingly. The total phosphorus and total nitrogen in the pond water are higher. Because the water quality is deteriorated without timely decomposition, the observation and monitoring of pond water quality should be strengthened. Water quality adjustments are carried out in due course. specific method: 1 set of new water to increase the total water capacity of the pond. 2 Adjust the water quality with lime, microbial preparations, etc. in due course. The color of the pond is yellowish green and yellowish brown; the transparency is about 30cm; the water quality meets the fishery water quality standards. Second, fine feeding In autumn, the organic matter content in ponds is usually high. Fertilization is mainly based on inorganic fertilizer, inorganic fertilizer is mainly based on phosphate fertilizer, and nitrogen fertilizer is supplemented. In autumn, the aquaculture objects grow relatively slowly. At this time, the feed of the concentrate is increased. The shrimp and crab ponds increase the animal feed, especially the high protein feed, which not only increases the yield, but also effectively improves the specifications and quality of the fish products. Breeding benefits. Third, timely oxygenation In the morning and evening after the fall, the temperature difference between the two is large, which is likely to cause anoxic floating heads and even pan-tangs. In order to effectively increase the dissolved oxygen in the water and reduce the content of toxic and harmful substances such as ammonia nitrogen and nitrite in the water, the aerator can be opened at 1-2 o'clock in the middle of the night, and shut down after 7-8 o'clock the next morning, while following the "three The principle of opening and not opening." In addition, you should bring your own amount of chemical oxygenator for emergency use. Fourth, control the water grass If there are too many water plants in the pond, it is easy to cause insufficient light at the bottom layer and severely lack of oxygen, causing the water plants and benthic organisms to rot and ruin, thus ruining the water quality. Therefore, timely clearing the decaying floating grass, manually removing too much dense water grass, and rationally controlling the density of water plants. , leaving a gap of 3-4 meters between the water grass. The coverage of shrimp and crab ponds is controlled at around 40%. Five, scientific disease prevention The main diseases in autumn are ectoparasites and bacterial diseases. It is best to use 1-2 insecticides and primary bactericides, or microbial preparations and substrate improvers to fully degrade toxic and harmful substances such as ammonia nitrogen and nitrite to reduce the incidence of diseases. Note: It is strictly forbidden to use the nationally banned fishery drugs. At the same time, the use of fishery drugs follows the provisions of the “Methods for the Use of Fishery Drugs†and strictly implements the drug withdrawal period. Sixth, timely listing The density of pond culture is too large, and the amount of fish is high. It can be harvested in batches and sold in a coordinated manner. Fishing selection In the morning, before pulling the net, use multi-dimensional, polysaccharide mixed bait to feed, reduce fish stress response; after pulling the net, use avermectin, chlorine dioxide, bromochlorohydantoin and other disinfection. Seven, pond management Adhere to the early, middle and late patrol ponds, and make a record, often clear the weeds at the pool, reduce the hiding place of the enemy creatures, and at the same time facilitate fishing; remove dead grass, dead fish, dead shrimps, dead crabs. Always check the anti-floating facilities to prevent shrimps and crabs from escaping. The above is all the contents of today, the article reprinted from the headline number Jishan Huayao, only for the reference of aquaculture farmers friends! Greenhouse Drip Irrigation System Fertigation is using your irrigator to fertilise the plants and soils as you water, which is the most efficient and advanced practice of fertilization. Aid of pressure system (or natural divide terrain), the soluble solid or liquid fertilizer, according to the soil nutrient content and crop fertilizer regularity and characteristics of species, with the fat of with irrigation water, through a controlled water supply pipeline system, supplying, the compatibility, water through the pipe and drop head form drip irrigation, uniform, regular, quantitative, infiltration area crop root growth and development, make the main root soil always stay loose and appropriate moisture content, at the same time according to different crop fertilizer characteristics, environment and soil nutrient content in soil; Crops in different growth phase water requirement, the different development stages of the fertilizer rule is the demand of design, the water and nutrient timing quantitative, provided directly in proportion to the crops. Greenhouse Drip Irrigation System,Greenhouse Micro Irrigation System ,Plant Drip Irrigation JIANGSU SKYPLAN GREENHOUSE TECHNOLOGY CO.,LTD , https://www.greenhousehydroponic.com
