Grain-saving fish farming four methods
Chemical Fertilizer Fish Fertilizer Fertilizer fish has the advantages of convenient transportation, simple application, high nutrient content, no organic matter, no consumption of dissolved oxygen in water, no pollution of water body, quick effect, high benefit, etc. Generally, 1 kg of urea can be used as a fish pond. About 1 kilogram. Fertilizer is a quick-acting fertilizer, and urea, ammonium bicarbonate, superphosphate, calcium magnesium phosphate fertilizer and compound fertilizer are commonly used for fish farming. Under normal circumstances, it is applied 2 to 3 days or 5 to 6 days. Each time, 2-3 to 3 kg of urea or 5 to 10 kg of ammonium bicarbonate or 8 to 10 kg of superphosphate is applied per mu. The object of fertilizer fish farming is mainly Plankton-based fish, especially the use of chemical fertilizers in the chain and carp are the best. Fertilizer ponds should always pay attention to the pH of the pool water, so that the pool water ph value controlled between 7.5 to 8. In order to prevent the acidification of water and affect the growth of fish, regular use of lime milk can be used to adjust. Usually 1 or 2 times a month, but do not apply fertilizer after giving lime for a week, so as not to affect the effect. Comprehensive fish farming is to organically combine fish farming production with the development of agriculture, forestry, animal husbandry, and industrial sideline industries, and comprehensively utilize the by-products produced by agriculture, forestry, animal husbandry, and industrial by-products and waste fish culture to form a benign artificial composite ecosystem. The breeding mode. Tests have shown that if one mu of fine-cultured fish pond is provided with a pig, 50 birds, and 0.3-0.4 mu of fish grass every year, the organic fertilizer and some green feed needed for fish farming can be basically solved, saving about 1,000 kilograms of food feed. Through comprehensive fish farming, livestock and poultry feed can be processed with food or other by-products, and fish and livestock waste can be fed with livestock manure and other wastes. Fertilizer pond fertilization can then be used to promote the close integration of agricultural, animal husbandry and fishing side industries, and increase livestock and poultry consumption. , Increased production of fresh fish, increased food, and improved efficiency. Grass and fish farming fish ponds generally account for 20% to 40% of the pond's water area. Comprehensive utilization of pond and dry land and four sides of open land, and the planting of high-quality, high-yield forage grass and feed fish is an effective way to solve fish feed and improve the efficiency of fish farming. The practice of foreign aquaculture shows that the economic benefits of planting forage grass and fish raising are 3 to 6 times higher than those for fish reared with grain. Ingredients for fish feeding can be scientifically formulated according to different fish and growth stages to improve the palatability of fish feed. It is also conducive to expanding the source of feed, reducing the feed coefficient and production cost, and is beneficial to the growth of fish. Improve the effect of meat increase, but also shorten the breeding cycle. According to experiments, the feed coefficient of fish fed on a single feed is as high as 3.5 to 4, and the feed conversion to compound feed is 1.5 to 2.5. At the same time, due to the good palatability and comprehensive nutrition of fish fed mixed feeds, fish diseases are also relatively reduced.