Every autumn and winter, a number of small reservoirs (or ponds) with area ranging from a few mu to tens of mu are built for the purpose of comprehensive three-dimensional planting of farmland irrigation, fish farming, livestock, poultry, fruit and vegetable fish. Unlike ordinary old reservoirs and old reservoirs, new small reservoirs are thin in sediment, muddy in water, poor in plankton breeding, poor in oxygen production, prone to lack of oxygen, unstable in pH, and poor in fish growth environment. How can they be farmed in the same year? Take high yield? First, scientifically build libraries to provide a good infrastructure environment for fish farming. From the point of view of aquaculture, it is best to place the reservoir in a location where the leeward sunlight is adequate; there is no water leakage at the dam and at the bottom of the reservoir; spillways and drains are set to block or block fish nets; debris such as tree stumps at the bottom of the reservoir is removed; The contradictory reservoir for aquaculture fish should determine the minimum level of fish conservation; electricity should be used for simple roads; and high-yield reservoirs should also be equipped with aerators. Second, thorough disinfection. Before the impoundment, level and consolidate the reservoir slopes and dam feet. Prevent leakage of water; eliminate the misunderstanding that the first fish culture in the newly constructed reservoir will not cause disease or fish disease, and thoroughly disinfect the fish 10 days prior to stocking. Insect pests and improved reservoir sediments. The method is: dry storage (depth of 10-20 meters) with 75 kg of lime per acre of water used throughout the reservoir; or with water (1 m) with lime per acre of 150 kg of water throughout the reservoir sprinkled. Third, as soon as possible water. Reservoir water mainly comes from rain. Water sources cannot be supplied on demand, so it is imperative to plug and store water as early as possible to ensure that there are sufficient water stocks no later than the end of March. Fourth, base fertilizer. Before stocking fish, 200-400 kilograms of organic fertilizer for livestock and poultry is required per acre. The dry pool fraction heaps are fermented in the shallow water of the bottom slope of the reservoir to allow free diffusion of fertilizers and water; the impounded reservoir is excavated after excavation of several small earthen ponds in the reservoir for fermentation of organic fertilizers; the fermented organic fertilizer can directly infiltrate the reservoir. . Basal fertilizer is best applied before disinfection. Fifth, a reasonable choice for stocking large-size fish species. New species of fish should be placed in reservoirs: herbivorous fish mainly, supplemented by fertilized water and omnivorous fish; multi-raising fish in the upper and lower levels of fish. The stocking quantity should be based on the surface area, water source status, and oxygen enrichment equipment. Fish size and aquaculture technology comprehensive consideration. Generally, the water level per acre (referring to the water surface area when the water level can be stable for a long time year-round) is magnified 500-1000 fish species and the output is 200-500 kg. The ratio of fish species: grass carp head locust 60%, pupa 30%, carp and other fish 10%. Fish species specifications: grass carp below 10 per kilogram, group head carp 15-25 per kilogram, carp 10-20 per kilogram. Sixth, scientific feeding, so that the amount of fine bait. The general guideline for feeding baits is to “grab two heads in the middleâ€, that is, early spring and evening, feeding mainly concentrates, and the amount of feeding is small, while the feeding focuses on the season of fish growth from June to September, during which the amount of bait The quality is more demanding. In the early spring and late autumn, feeding is performed once a day to match the pellet feed or cake-based diet. In June-September, the bait is fed twice a day and once in the morning and afternoon, the fodder is fed first, and then the batch or cake is fed. At the same time according to the "four set" (time fixed quantitative fixed position) "three look" (see the weather to see the quality of fish to see how to eat fish) method of feeding. Seventh, skillfully applying fertilizer to keep fertilizer and water. Although herbivorous fish are mainly cultivated, in addition to the main feed fodder, it is also necessary to regularly apply topdressing to multiply the plankton, enhance the body's own oxygen production capacity, and increase the natural feed of fish such as cockroaches. It can also accelerate sedimentation speed of mud. Fertilizer is still dominated by fermented organic fertilizer, supplemented by inorganic fertilizers, and it is applied in small quantities several times. Organic fertilizer is about 100kg per mu, and the water is increased or decreased according to water quality, weather, and water temperature. The water is maintained in dark brown, green grass, and integrated. Yellow or red sauce, and there are significant changes in water color in the morning, evening and evening. Transparency 30-45cm. Top dressing should avoid rainstorm time, so as not to waste fertilizer and water when it is lost. Eight, often throw lime, Shen mud water. The mud in the new reservoir is muddy, affecting the respiration of fish and the reproduction of plankton. Splash lime once every 20-30 days, with a good muddy water effect, but also play a role in the prevention of fish diseases. The amount is 20-30kg of water per acre per time. Nine, try not to pull the net or pull the net as little as possible. The trawl operation can easily cause the sediment to float and cause water turbidity. It should not be trawl operation as much as possible. If it is really necessary to trawl, it is better to use a net with less sinkers. X. Improve the surrounding environment of the reservoir. The use of ryegrass and sudangrass on dam surfaces, slopes, and slopes on both sides can both feed the fish as a green feed and prevent the mud from being flushed into the reservoir by rain and causing muddy water.
Ningxia Goji Berries,Chinese Wolfberry,Healthy Food
Dried Fruit Goji Black Berry Co.,Ltd , http://www.chgojipowder.com